50278 + Interview Questions in Physics

1.	There is a non-conducting rod of length L and negligible mass with two small balls each of mass m and electric charge Q attached to its ends.the rod can rotate about a fixed vertical axis crossing it distance L/4 from one of its ends. A uniform horizontal electric field E is established. 1.At first the rod is in unstable equilibrium.If it is disturbed slightly in this position, the max velocity attained by the ball which is closer to the axis in subsequent motion is?
Answer» There is a non-conducting rod of length L and negligible mass with two small balls each of mass m and electric charge Q attached to its ends.the rod can rotate about a fixed vertical axis crossing it distance L/4 from one of its ends. A uniform horizontal electric field E is established. 1.At first the rod is in unstable equilibrium.If it is disturbed slightly in this position, the max velocity attained by the ball which is closer to the axis in subsequent motion is?

Discussion

2.	a gun is projected on platform moving with velocity v=10i. a bullet is fired from the gun with muzzle velocity u=40i+20j wrt platform .then the horizontal range of projectile is
Answer» a gun is projected on platform moving with velocity v=10i. a bullet is fired from the gun with muzzle velocity u=40i+20j wrt platform .then the horizontal range of projectile is

Discussion

3.	At what distance from the centre of a uniformly charged ring, maximum value of electric field will be obtained?
Answer» At what distance from the centre of a uniformly charged ring, maximum value of electric field will be obtained?

Discussion

4.	A man of mass m climbs on a rope of length L suspended below a balloon of mass M . The ballon is stationary with respect to ground. If the man begins to climb up the rope at a speed V (relative to rope). In what direction and with what speed(relative to ground) will the balloon move
Answer» A man of mass m climbs on a rope of length L suspended below a balloon of mass M . The ballon is stationary with respect to ground. If the man begins to climb up the rope at a speed V (relative to rope). In what direction and with what speed(relative to ground) will the balloon move

Discussion

5.	Light from a mains powered fluorescent lamp is falling on a gear rotating clockwise. The gear wheel has one tooth painted white. The white tooth appears to be rotating in the anti-clockwise direction with a speed of 60 rpm. If the mains frequency is 50 Hz, the true speed of the gear wheel is
Answer» Light from a mains powered fluorescent lamp is falling on a gear rotating clockwise. The gear wheel has one tooth painted white. The white tooth appears to be rotating in the anti-clockwise direction with a speed of 60 rpm. If the mains frequency is 50 Hz, the true speed of the gear wheel is

Discussion

6.	86.Prove that for a particle which is moving in uniform acceleration, the average velocity is arithmetic mean of the initial and final velocity of the particle.
Answer» 86.Prove that for a particle which is moving in uniform acceleration, the average velocity is arithmetic mean of the initial and final velocity of the particle.

Discussion

7.	Reducing speed limits neither saves lives nor protects the environment. This is because the more slowly a car is driven, the more time it spends on the road spewing exhaust into the air and running the risk of colliding with other vehicles. The argument's reasoning is flawed because the argument
Answer» Reducing speed limits neither saves lives nor protects the environment. This is because the more slowly a car is driven, the more time it spends on the road spewing exhaust into the air and running the risk of colliding with other vehicles. The argument's reasoning is flawed because the argument

7.

Reducing speed limits neither saves lives nor protects the environment. This is because the more slowly a car is driven, the more time it spends on the road spewing exhaust into the air and running the risk of colliding with other vehicles. The argument's reasoning is flawed because the argument

Answer»

Reducing speed limits neither saves lives nor protects the environment. This is because the more slowly a car is driven, the more time it spends on the road spewing exhaust into the air and running the risk of colliding with other vehicles.

The argument's reasoning is flawed because the argument

Discussion

8.	The rear side of a truck is open and a box of 40 kg mass is placed 5 m away from the open end as shown. The coefficient of friction between the box & the surface below it is 0.15. On a straight road, the truck starts from rest and accelerates with 2 ms−2. At what distance from the starting point does the box fall off the truck (i.e. distance travelled by the truck) ?[Ignore the size of the box]
Answer» The rear side of a truck is open and a box of $40 kg$ mass is placed $5 m$ away from the open end as shown. The coefficient of friction between the box & the surface below it is $0.15$ . On a straight road, the truck starts from rest and accelerates with $2 {ms}^{- 2}$ . At what distance from the starting point does the box fall off the truck (i.e. distance travelled by the truck) ?[Ignore the size of the box]

Discussion

9.	why is it that the frequency of oscillation of potential energy and kinetic energy is twice as that of displacement or velocity or acceleration of a partocle excecuting shm
Answer» why is it that the frequency of oscillation of potential energy and kinetic energy is twice as that of displacement or velocity or acceleration of a partocle excecuting shm

Discussion

10.	In a new system of units, the fundamental quantities mass, length and time are replaced by acceleration a, density ρ and frequency f. The dimensional formula for force in this system is
Answer» In a new system of units, the fundamental quantities mass, length and time are replaced by acceleration $a$ , density $ρ$ and frequency $f$ . The dimensional formula for force in this system is

Discussion

11.	In a circuit, a metal filament lamp is connected in series with a capacitor of capacitance C μF across a 200 V,50 Hz supply. The power consumed by the lamp is 500 W while the voltage drop across it is 100 V. Assume that there is no inductive load in the circuit. Take rms values of the voltages. The magnitude of the phase-angle (in degrees) between the current and the supply voltage is ϕ.Assume, π√3≈5.The value of C is -
Answer» In a circuit, a metal filament lamp is connected in series with a capacitor of capacitance $C μ F$ across a $200 V, 50 Hz$ supply. The power consumed by the lamp is $500 W$ while the voltage drop across it is $100 V$ . Assume that there is no inductive load in the circuit. Take $r m s$ values of the voltages. The magnitude of the phase-angle (in degrees) between the current and the supply voltage is $ϕ$ . Assume, $π \sqrt{3} \approx 5$ . The value of $C$ is -

Discussion

12.	Figure shows infinitely long bent wires in the plane of paper and each carrying a current i with O as origin and X and Y axis as shown, co-ordinates of points P & Q are (2 m,0) and (6 m,0) respectively. Magnetic induction at P is given by αμ0i32π. The value of α is
Answer» Figure shows infinitely long bent wires in the plane of paper and each carrying a current $i$ with $O$ as origin and $X$ and $Y$ axis as shown, co-ordinates of points $P$ & $Q$ are $(2 m, 0)$ and $(6 m, 0)$ respectively. Magnetic induction at $P$ is given by $\frac{α μ_{0} i}{32 π}$ . The value of $α$ is

Discussion

13.	Integrate:∫dt6t−1
Answer» Integrate: $\int \frac{d t}{6 t - 1}$

Discussion

14.	A body of mass 400g slides on a rough horizontal surface. If the frictional force is 3.0 N, find (a) the angle made by the contact force on the body with the vertical and (b) the magnitude of the contact force. Take g = 10ms2
Answer» A body of mass 400g slides on a rough horizontal surface. If the frictional force is 3.0 N, find (a) the angle made by the contact force on the body with the vertical and (b) the magnitude of the contact force. Take g = 10 $\frac{m}{s^{2}}$

Discussion

15.	A bike experiences a total reaction force of 1000 N when it tilts through an angle of 60∘ with the vertical, while moving with a velocity of 15 m/s on a frictionless road with a radius of curvature of 25 m. What is the mass of the bike? (g=10 m/s2)
Answer» A bike experiences a total reaction force of $1000 N$ when it tilts through an angle of $60^{\circ}$ with the vertical, while moving with a velocity of $15 m/s$ on a frictionless road with a radius of curvature of $25 m$ . What is the mass of the bike? $(g = 10 {m/s}^{2})$

Discussion

16.	Why did rain drops fall in different direction
Answer» Why did rain drops fall in different direction

Discussion

17.	Derive an expression for lateral shift and normal shift. On what factors these depends
Answer» Derive an expression for lateral shift and normal shift. On what factors these depends

Discussion

18.	If u=5m/s and a=3m/s^2 , find displacement in 17 sec.
Answer» If u=5m/s and a=3m/s^2 , find displacement in 17 sec.

Discussion

19.	A solid cylinder (radius r=0.2 m) rolls without slipping in a cylindrical trough (radius R=0.8 m). The time period of small oscillations is [Take g=10 m/s2]
Answer» A solid cylinder (radius $r = 0.2 m$ ) rolls without slipping in a cylindrical trough (radius $R = 0.8 m$ ). The time period of small oscillations is [Take $g = 10 {m/s}^{2}$ ]

Discussion

20.	A ball of mass 500 gm is tied to one end of a rope of length 3 m. The other end is fixed and the ball is now moving along a horizontal circle with uniform angular speed of 2 rev/s. The tension in the rope (in newton) will be:
Answer» A ball of mass $500 gm$ is tied to one end of a rope of length $3 m$ . The other end is fixed and the ball is now moving along a horizontal circle with uniform angular speed of $2 rev/s$ . The tension in the rope (in $newton$ ) will be:

Discussion

21.	2 Calculate the molarity of one kilogram of electronsin 500 ml of the solution (particle in solution)assume e- as a stable
Answer» 2 Calculate the molarity of one kilogram of electronsin 500 ml of the solution (particle in solution)assume e- as a stable

Discussion

22.	Find the value of θ in the diagram, so that the projectile can hit the target, placed at a height of 10 m from ground (as shown). (g=10 m/s2)
Answer» Find the value of $θ$ in the diagram, so that the projectile can hit the target, placed at a height of $10 m$ from ground (as shown). $(g = 10 {m/s}^{2}$ )

Discussion

23.	A spherical ball rolls on an inclined plane without slipping. Ratio of total kinetic energy to rotational kinetic energy is
Answer» A spherical ball rolls on an inclined plane without slipping. Ratio of total kinetic energy to rotational kinetic energy is

Discussion

24.	What are conservative forces and non-conservative forces?
Answer» What are conservative forces and non-conservative forces?

Discussion

25.	A wire having a linear density 0.1 kg/m is kept under a tension of 490 N. It is observed that it resonates at a frequency of 400 Hz and the next higher frequency 450 Hz. Find the length of the wire
Answer» A wire having a linear density $0.1 kg/m$ is kept under a tension of $490 N$ . It is observed that it resonates at a frequency of $400 Hz$ and the next higher frequency $450 Hz$ . Find the length of the wire

Discussion

26.	(i) Calculate the mass of 3.011 x 1023 nitrogen molecules.(ii) How many moles are 12.044 x 1023 atoms of He?
Answer» (i) Calculate the mass of 3.011 x 10²³ nitrogen molecules. (ii) How many moles are 12.044 x 10²³ atoms of He?

Discussion

27.	Why w external is taken as positive and Conservative electrostatic work done negative
Answer» Why w external is taken as positive and Conservative electrostatic work done negative

Discussion

28.	The rear side of a truck is open and a box of 40 kg mass is placed 5 m away from the open end as shown. The coefficient of friction between the box and the surface below it is 0.15. On a straight road, the truck starts from rest and accelerates with 2 ms−2. At what distance from the starting point does the box fall off the truck (i.e., distance travelled by the truck)? [Ignore the size of the box]
Answer» The rear side of a truck is open and a box of $40 kg$ mass is placed $5 m$ away from the open end as shown. The coefficient of friction between the box and the surface below it is $0.15$ . On a straight road, the truck starts from rest and accelerates with $2 {ms}^{- 2}$ . At what distance from the starting point does the box fall off the truck (i.e., distance travelled by the truck)? [Ignore the size of the box]

Discussion

29.	the heat of combustion of sucrose C_{12}H_{22}O_{11} at cons†an t volume is -1348.9kcalmol^{-1 }at 25^° C, then the heat of reaction at cons†an t pressure i
Answer» the heat of combustion of sucrose C_{12}H_{22}O_{11} at cons†an t volume is -1348.9kcalmol^{-1 }at 25^° C, then the heat of reaction at cons†an t pressure i

Discussion

30.	16. The force F is given by expression F=A cos(Bx)+C sin(Dt), where x is the displacement and T is the time. Then dimension of D/B are same as the of
Answer» 16. The force F is given by expression F=A cos(Bx)+C sin(Dt), where x is the displacement and T is the time. Then dimension of D/B are same as the of

Discussion

31.	A container with liquid filled inside it till depth H from the top is as shown in the diagram. Find the maximum angular velocity with which the cylinder can be rotated about the axis shown, such that the liquid doesn’t spill out.
Answer» A container with liquid filled inside it till depth $H$ from the top is as shown in the diagram. Find the maximum angular velocity with which the cylinder can be rotated about the axis shown, such that the liquid doesn’t spill out.

Discussion

32.	14. What is average kinetic energy of }1 mole of }SO_2 at }300K ? } (1) }4578J/mol (2) 3134 J/mol (3) }3741J/mol (4) 4173 J/mol
Answer» 14. What is average kinetic energy of }1 mole of }SO_2 at }300K ? } (1) }4578J/mol (2) 3134 J/mol (3) }3741J/mol (4) 4173 J/mol

Discussion

33.	9. In a photo electric experiment, photon of energy5 eV are incident on a metal surface. They liberateelectrons which are just stopped by an electrode at apotential of -3.5V with respect to the metal. The workfunction of the metal in eV is2) 3.53) 1.51)54) 8.5
Answer» 9. In a photo electric experiment, photon of energy5 eV are incident on a metal surface. They liberateelectrons which are just stopped by an electrode at apotential of -3.5V with respect to the metal. The workfunction of the metal in eV is2) 3.53) 1.51)54) 8.5

Discussion

34.	A coil in the shape of an equilateral triangle of side 0.02 m is suspended from a vertex such that it is hanging in a vertical plane. A magnetic field of magnetic strength 5×10−2 T is applied along the plane of coil. When a current of 0.1 A is passed through the coil, the torque experienced by its will be:
Answer» A coil in the shape of an equilateral triangle of side $0.02 m$ is suspended from a vertex such that it is hanging in a vertical plane. A magnetic field of magnetic strength $5 \times 10^{- 2} T$ is applied along the plane of coil. When a current of $0.1 A$ is passed through the coil, the torque experienced by its will be:

Discussion

35.	A particle of mass m is going along the surface of a smooth hemisphere of radius R in the vertical plane. At the moment shown, its speed is v. Choose correct options(s).
Answer» A particle of mass $m$ is going along the surface of a smooth hemisphere of radius $R$ in the vertical plane. At the moment shown, its speed is $v$ . Choose correct options(s).

Discussion

36.	42.Two circular coils of radii 5 cm and 10 cm carry equal current of 1 amphere. The coils have 50 and 60 turn respectively and are placed in such a way that their planes as well as the centre coincides. Find the magnitude of magnetic field at common centre when the current in coils are in opposite sense
Answer» 42.Two circular coils of radii 5 cm and 10 cm carry equal current of 1 amphere. The coils have 50 and 60 turn respectively and are placed in such a way that their planes as well as the centre coincides. Find the magnitude of magnetic field at common centre when the current in coils are in opposite sense

Discussion

37.	A uniform solid cube is floating in a liquid as shown in the figure, with length x inside the liquid. Some changes in parameters are mentioned in Column I. Assuming no other changes, match the following. (A) If density of the liquid decreases, x will(P) Increase(B) If height of the cube is increased keeping base area and density same, x will(Q) Decrease(C) If the whole system is accelerated upward, then x will(R) Remain same(D) If the cube is replaced by another cube of same size but lesser density, x will(S) may increaseWhich of the following option has the correct combination considering column-I and column-II.
Answer» A uniform solid cube is floating in a liquid as shown in the figure, with length $x$ inside the liquid. Some changes in parameters are mentioned in Column I. Assuming no other changes, match the following. $\begin{matrix} (A) If density of the liquid decreases, x will & (P) Increase (B) If height of the cube is increased keeping base area and density same, x will & (Q) Decrease (C) If the whole system is accelerated upward, then x will & (R) Remain same (D) If the cube is replaced by another cube of same size but lesser density, x will & (S) may increase \end{matrix}$ Which of the following option has the correct combination considering column-I and column-II.

Discussion

38.	What is the wavelength of the wave
Answer» What is the wavelength of the wave

Discussion

39.	Find the angle between the vectors ^i−^j and ^j−^k.
Answer» Find the angle between the vectors $^i -^j$ and $^j -^k$ .

Discussion

40.	In the nucleus of helium if F1 is the net force between two protons, F2 if the net force between two neutrons and F3 is the net force between a proton and a neutron. Then Options: F1 = F2 = F3 F1 > F2 > F3 F2 > F3 > F1 F2 = F3 > F1
Answer» In the nucleus of helium if F1 is the net force between two protons, F2 if the net force between two neutrons and F3 is the net force between a proton and a neutron. Then Options: F1 = F2 = F3 F1 > F2 > F3 F2 > F3 > F1 F2 = F3 > F1

Discussion

41.	Two point-charges +9e and +e are is kept 16 cm apart from each other. Where should a third charge q be placed between them so that the system is in the equilibrium state?
Answer» Two point-charges $+ 9 e$ and $+ e$ are is kept $16 cm$ apart from each other. Where should a third charge $q$ be placed between them so that the system is in the equilibrium state?

Discussion

42.	How can the trajectory of projectile can be written in terms of range?
Answer» How can the trajectory of projectile can be written in terms of range?

Discussion

43.	A concave mirror has a focal length of 20cm. At what distance from the mirror should a 4cm tall object be placed so that it forms an image at a distance of 30 cm from the mirror?Also, calculate the size of image
Answer» A concave mirror has a focal length of 20cm. At what distance from the mirror should a 4cm tall object be placed so that it forms an image at a distance of 30 cm from the mirror?Also, calculate the size of image

Discussion

44.	The excess of pressure inside a soap bubble than that of the outer pressure is
Answer» The excess of pressure inside a soap bubble than that of the outer pressure is

Discussion

45.	Figure shows a rod of length l resting on a wall and the floor. Its lower end A is pulled towards left with a constant velocity u. As a result of this, end B starts moving down along the wall. Find the velocity of the other end B downward when the rod makes an angle θ with the horizontal.
Answer» Figure shows a rod of length l resting on a wall and the floor. Its lower end A is pulled towards left with a constant velocity u. As a result of this, end B starts moving down along the wall. Find the velocity of the other end B downward when the rod makes an angle $θ$ with the horizontal.

45.

Figure shows a rod of length l resting on a wall and the floor. Its lower end A is pulled towards left with a constant velocity u. As a result of this, end B starts moving down along the wall. Find the velocity of the other end B downward when the rod makes an angle θ with the horizontal.

Answer»

Figure shows a rod of length l resting on a wall and the floor. Its lower end A is pulled towards left with a constant velocity u. As a result of this, end B starts moving down along the wall. Find the velocity of the other end B downward when the rod makes an angle $θ$ with the horizontal.

Discussion

46.	A frame ABCD is rotating with angular velocity ω about an axis which passes through the point O perpendicular to the plane of paper as shown in the figure. A uniform magnetic field →B is applied into the plane of the paper in the region as shown. Match the following. Column−IColumn−II(A) Potential difference between A and O(p) zero(B) Potential difference between O and D(q)BωL22(C) Potential difference between C and D(r) BωL2(D) Potential difference between A and D(s) constant undefinedundefinedundefinedundefined
Answer» A frame ABCD is rotating with angular velocity $ω$ about an axis which passes through the point O perpendicular to the plane of paper as shown in the figure. A uniform magnetic field $\to B$ is applied into the plane of the paper in the region as shown. Match the following. $\begin{matrix} C o l u m n - I & C o l u m n - I I (A) P o t e n t i a l d i f f e r e n c e b e t w e e n A a n d O & (p) z e r o (B) P o t e n t i a l d i f f e r e n c e b e t w e e n O a n d D & (q) \frac{B ω L^{2}}{2} (C) P o t e n t i a l d i f f e r e n c e b e t w e e n C a n d D & (r) B ω L^{2} (D) P o t e n t i a l d i f f e r e n c e b e t w e e n A a n d D & (s) c o n s t a n t \end{matrix}$ undefined undefined undefined undefined

46.

A frame ABCD is rotating with angular velocity ω about an axis which passes through the point O perpendicular to the plane of paper as shown in the figure. A uniform magnetic field →B is applied into the plane of the paper in the region as shown. Match the following. Column−IColumn−II(A) Potential difference between A and O(p) zero(B) Potential difference between O and D(q)BωL22(C) Potential difference between C and D(r) BωL2(D) Potential difference between A and D(s) constant undefinedundefinedundefinedundefined

Answer»

A frame ABCD is rotating with angular velocity $ω$ about an axis which passes through the point O perpendicular to the plane of paper as shown in the figure. A uniform magnetic field $\to B$ is applied into the plane of the paper in the region as shown.

Match the following.

$\begin{matrix} C o l u m n - I & C o l u m n - I I (A) P o t e n t i a l d i f f e r e n c e b e t w e e n A a n d O & (p) z e r o (B) P o t e n t i a l d i f f e r e n c e b e t w e e n O a n d D & (q) \frac{B ω L^{2}}{2} (C) P o t e n t i a l d i f f e r e n c e b e t w e e n C a n d D & (r) B ω L^{2} (D) P o t e n t i a l d i f f e r e n c e b e t w e e n A a n d D & (s) c o n s t a n t \end{matrix}$

undefined
undefined
undefined
undefined

Discussion

47.	In the equation (P+aV2)(V−b)=constant, the unit of a is
Answer» In the equation $(P + \frac{a}{V^{2}}) (V - b) = constant$ , the unit of $a$ is

Discussion

48.	The message signal is used to SSB-SC modulate a sinusoidal carrier signal. If f∞=2 kHz, then the bandwidth of the resultant modulated signal will be ____kHz.m(t)=[sin (2πfmt)πfmt]24
Answer» The message signal is used to SSB-SC modulate a sinusoidal carrier signal. If $f_{\infty} = 2 k H z,$ then the bandwidth of the resultant modulated signal will be ____kHz. $m (t) = {[\frac{s i n (2 π f_{m} t)}{π f_{m} t}]}^{2}$ 4

Discussion

49.	A particle, which is constrained to move along the x - axis the x - axis, is subjected to a force in the same direction which varies with the distance x of the particle from the origin as F(x)=−kx+ax3. Here k and a are positive energy U(x) of the particle is
Answer» A particle, which is constrained to move along the x - axis the x - axis, is subjected to a force in the same direction which varies with the distance x of the particle from the origin as $F (x) = - k x + a x^{3}$ . Here k and a are positive energy U(x) of the particle is

Discussion

50.	The virtual content of 4A and 50 Hz flows in an AC circuit containing a coil .The power consumed in the coil is 240 W .If the virtual voltage across the coil is 100V ,then its resistance will be
Answer» The virtual content of 4A and 50 Hz flows in an AC circuit containing a coil .The power consumed in the coil is 240 W .If the virtual voltage across the coil is 100V ,then its resistance will be

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

a gun is projected on platform moving with velocity v=10i. a bullet is fired from the gun with muzzle velocity u=40i+20j wrt platform .then the horizontal range of projectile is

At what distance from the centre of a uniformly charged ring, maximum value of electric field will be obtained?

A man of mass m climbs on a rope of length L suspended below a balloon of mass M . The ballon is stationary with respect to ground. If the man begins to climb up the rope at a speed V (relative to rope). In what direction and with what speed(relative to ground) will the balloon move

Light from a mains powered fluorescent lamp is falling on a gear rotating clockwise. The gear wheel has one tooth painted white. The white tooth appears to be rotating in the anti-clockwise direction with a speed of 60 rpm. If the mains frequency is 50 Hz, the true speed of the gear wheel is

86.Prove that for a particle which is moving in uniform acceleration, the average velocity is arithmetic mean of the initial and final velocity of the particle.

Reducing speed limits neither saves lives nor protects the environment. This is because the more slowly a car is driven, the more time it spends on the road spewing exhaust into the air and running the risk of colliding with other vehicles. The argument's reasoning is flawed because the argument

why is it that the frequency of oscillation of potential energy and kinetic energy is twice as that of displacement or velocity or acceleration of a partocle excecuting shm

In a new system of units, the fundamental quantities mass, length and time are replaced by acceleration a, density ρ and frequency f. The dimensional formula for force in this system is

Figure shows infinitely long bent wires in the plane of paper and each carrying a current i with O as origin and X and Y axis as shown, co-ordinates of points P &amp; Q are (2 m,0) and (6 m,0) respectively. Magnetic induction at P is given by αμ0i32π. The value of α is

Integrate:∫dt6t−1

A body of mass 400g slides on a rough horizontal surface. If the frictional force is 3.0 N, find (a) the angle made by the contact force on the body with the vertical and (b) the magnitude of the contact force. Take g = 10ms2

A bike experiences a total reaction force of 1000 N when it tilts through an angle of 60∘ with the vertical, while moving with a velocity of 15 m/s on a frictionless road with a radius of curvature of 25 m. What is the mass of the bike? (g=10 m/s2)

Why did rain drops fall in different direction

Derive an expression for lateral shift and normal shift. On what factors these depends

If u=5m/s and a=3m/s^2 , find displacement in 17 sec.

A solid cylinder (radius r=0.2 m) rolls without slipping in a cylindrical trough (radius R=0.8 m). The time period of small oscillations is [Take g=10 m/s2]

A ball of mass 500 gm is tied to one end of a rope of length 3 m. The other end is fixed and the ball is now moving along a horizontal circle with uniform angular speed of 2 rev/s. The tension in the rope (in newton) will be:

2 Calculate the molarity of one kilogram of electronsin 500 ml of the solution (particle in solution)assume e- as a stable

Find the value of θ in the diagram, so that the projectile can hit the target, placed at a height of 10 m from ground (as shown). (g=10 m/s2)

A spherical ball rolls on an inclined plane without slipping. Ratio of total kinetic energy to rotational kinetic energy is

What are conservative forces and non-conservative forces?

A wire having a linear density 0.1 kg/m is kept under a tension of 490 N. It is observed that it resonates at a frequency of 400 Hz and the next higher frequency 450 Hz. Find the length of the wire

(i) Calculate the mass of 3.011 x 1023 nitrogen molecules.(ii) How many moles are 12.044 x 1023 atoms of He?

Why w external is taken as positive and Conservative electrostatic work done negative

the heat of combustion of sucrose C_{12}H_{22}O_{11} at cons†an t volume is -1348.9kcalmol^{-1 }at 25^° C, then the heat of reaction at cons†an t pressure i

16. The force F is given by expression F=A cos(Bx)+C sin(Dt), where x is the displacement and T is the time. Then dimension of D/B are same as the of

A container with liquid filled inside it till depth H from the top is as shown in the diagram. Find the maximum angular velocity with which the cylinder can be rotated about the axis shown, such that the liquid doesn’t spill out.

14. What is average kinetic energy of }1 mole of }SO_2 at }300K ? } (1) }4578J/mol (2) 3134 J/mol (3) }3741J/mol (4) 4173 J/mol

9. In a photo electric experiment, photon of energy5 eV are incident on a metal surface. They liberateelectrons which are just stopped by an electrode at apotential of -3.5V with respect to the metal. The workfunction of the metal in eV is2) 3.53) 1.51)54) 8.5

A particle of mass m is going along the surface of a smooth hemisphere of radius R in the vertical plane. At the moment shown, its speed is v. Choose correct options(s).

What is the wavelength of the wave

Find the angle between the vectors ^i−^j and ^j−^k.

In the nucleus of helium if F1 is the net force between two protons, F2 if the net force between two neutrons and F3 is the net force between a proton and a neutron. Then Options: F1 = F2 = F3 F1 > F2 > F3 F2 > F3 > F1 F2 = F3 > F1

Two point-charges +9e and +e are is kept 16 cm apart from each other. Where should a third charge q be placed between them so that the system is in the equilibrium state?

How can the trajectory of projectile can be written in terms of range?

A concave mirror has a focal length of 20cm. At what distance from the mirror should a 4cm tall object be placed so that it forms an image at a distance of 30 cm from the mirror?Also, calculate the size of image

The excess of pressure inside a soap bubble than that of the outer pressure is

Figure shows a rod of length l resting on a wall and the floor. Its lower end A is pulled towards left with a constant velocity u. As a result of this, end B starts moving down along the wall. Find the velocity of the other end B downward when the rod makes an angle θ with the horizontal.

In the equation (P+aV2)(V−b)=constant, the unit of a is

The message signal is used to SSB-SC modulate a sinusoidal carrier signal. If f∞=2 kHz, then the bandwidth of the resultant modulated signal will be ____kHz.m(t)=[sin (2πfmt)πfmt]24

A particle, which is constrained to move along the x - axis the x - axis, is subjected to a force in the same direction which varies with the distance x of the particle from the origin as F(x)=−kx+ax3. Here k and a are positive energy U(x) of the particle is

The virtual content of 4A and 50 Hz flows in an AC circuit containing a coil .The power consumed in the coil is 240 W .If the virtual voltage across the coil is 100V ,then its resistance will be

Figure shows infinitely long bent wires in the plane of paper and each carrying a current i with O as origin and X and Y axis as shown, co-ordinates of points P & Q are (2 m,0) and (6 m,0) respectively. Magnetic induction at P is given by αμ0i32π. The value of α is