50278 + Interview Questions in Physics

1.	What is the number of reflection and refraction taking place in water droplet in a primary rainbow?
Answer» What is the number of reflection and refraction taking place in water droplet in a primary rainbow?

Discussion

2.	Let g(t)=π/2∫−π/2cos(π4t+f(x))dx, where f(x)=loge(x+√x2+1),x∈R. Then which one of the following is correct:
Answer» Let $g (t) = π / 2 \int - π / 2 cos (\frac{π}{4} t + f (x)) d x,$ where $f (x) = {log}_{e} (x + \sqrt{x^{2} + 1}), x \in R .$ Then which one of the following is correct:

Discussion

3.	A cannon B and a target are 0.98 km apart located at the same level. Find the time taken to hit the target, if the speed of the shell fired by the cannon is 98 m/s. Neglect the air drag and take g=9.8 m/s2.
Answer» A cannon $B$ and a target are $0.98 km$ apart located at the same level. Find the time taken to hit the target, if the speed of the shell fired by the cannon is $98 m/s$ . Neglect the air drag and take $g = 9.8 {m/s}^{2}$ .

Discussion

4.	A potentiometer wire PQ of 1 m length is connected to a standard cell E1 . Another cell E2 of emf 1.02 V is connected with a resistance ′r′ and switch S (as shown in figure). With switch S open, the null position is obtained at a distance of 49 cm from Q. The potential gradient in the potentiometer wire is
Answer» A potentiometer wire PQ of $1 m$ length is connected to a standard cell $E_{1}$ . Another cell $E_{2}$ of emf $1.02 V$ is connected with a resistance $^{'} r^{'}$ and switch $S$ (as shown in figure). With switch $S$ open, the null position is obtained at a distance of $49 cm$ from $Q$ . The potential gradient in the potentiometer wire is

Discussion

5.	One main scale division of a Vernier calliper is ′a′ cm and the nth division of the Vernier scale coincides with the (n−1)th division of the main scale. The least count of the calliper (in mm) is:
Answer» One main scale division of a Vernier calliper is $^{'} a^{'} cm$ and the $n^{t h}$ division of the Vernier scale coincides with the $(n - 1)^{t h}$ division of the main scale. The least count of the calliper (in $mm$ ) is:

Discussion

6.	A cylinder rolls without slipping down an inclined plane, the number of degrees of freedom it has, is
Answer» A cylinder rolls without slipping down an inclined plane, the number of degrees of freedom it has, is

Discussion

7.	105.There is a cubicalcopy room ABCD with the wall CD as a plane mirror .each side of the room is 3m . We place a camera at the midpoint of the wall AB .at what distance should the camera be focused to photograph of image of an object at A (1)1.6m (2)3m (3)6m (4)6.18m
Answer» 105.There is a cubicalcopy room ABCD with the wall CD as a plane mirror .each side of the room is 3m . We place a camera at the midpoint of the wall AB .at what distance should the camera be focused to photograph of image of an object at A (1)1.6m (2)3m (3)6m (4)6.18m

Discussion

8.	If →P=→Q then which of the following is NOT correct
Answer» If $\to P = \to Q$ then which of the following is NOT correct

Discussion

9.	A mass m has given a charge +q is attached at the end of a light rod. A horizontal uniform electric field is exist as shown in the figure. If the mass is released from the position shown in figure, find the angular velocity of the rod when it passes through the bottom most position.
Answer» A mass $m$ has given a charge $+ q$ is attached at the end of a light rod. A horizontal uniform electric field is exist as shown in the figure. If the mass is released from the position shown in figure, find the angular velocity of the rod when it passes through the bottom most position.

Discussion

10.	Circuit is as shown in the figure. Initially, the key is connected to 1 and now shifted to 2, before shifting of key, energy stored in capacitor is U1 and after shifting of key, energy stored in capacitor is U2, then U1U2 will be
Answer» Circuit is as shown in the figure. Initially, the key is connected to 1 and now shifted to 2, before shifting of key, energy stored in capacitor is $U_{1}$ and after shifting of key, energy stored in capacitor is $U_{2}$ , then $\frac{U_{1}}{U_{2}}$ will be

Discussion

11.	The radii of the two columns in U-tube are r1 and r2. When a liquid of density ρ (angle of contact is 0∘) is filled in it, the level difference of liquid in two arms is h. The surface tension of liquid is (g= acceleration due to gravity and r1<r1)
Answer» The radii of the two columns in U-tube are $r_{1}$ and $r_{2}$ . When a liquid of density $ρ$ (angle of contact is $0^{\circ}$ ) is filled in it, the level difference of liquid in two arms is $h$ . The surface tension of liquid is ( $g =$ acceleration due to gravity and $r_{1} < r_{1}$ )

Discussion

12.	39.calculate the rms speed of an ideal diatomic gas having molecular weight 32 gm/mol at 0 degree c. if the specific heats at constant pressure and volume are respectively 8.3 j/mol k and 6.34 cal/mol k respectively.
Answer» 39.calculate the rms speed of an ideal diatomic gas having molecular weight 32 gm/mol at 0 degree c. if the specific heats at constant pressure and volume are respectively 8.3 j/mol k and 6.34 cal/mol k respectively.

Discussion

13.	A particle of mass 107 kg is moving in the positive direction of x. Its initial position is x = 0 and initial velocity is 1 m/s. Find the velocity in m/s at x = 10 m, if power at x=0 is 2 watts
Answer» A particle of mass $\frac{10}{7}$ kg is moving in the positive direction of x. Its initial position is x = 0 and initial velocity is 1 m/s. Find the velocity in m/s at x = 10 m, if power at x=0 is 2 watts

Discussion

14.	Two stones A and B are projected from the same point. B is thrown 1 second after A is thrown. A is projected with a velocity of 60 m/s at an angle 30∘ with the horizontal and B is projected with velocity u at an angle of 45∘ with the horizontal. Find u if both stones hit the ground at the same time. (Take g=10 m/s)
Answer» Two stones $A$ and $B$ are projected from the same point. $B$ is thrown $1$ second after $A$ is thrown. $A$ is projected with a velocity of $60 m / s$ at an angle $30^{\circ}$ with the horizontal and $B$ is projected with velocity $u$ at an angle of $45^{\circ}$ with the horizontal. Find $u$ if both stones hit the ground at the same time. (Take $g = 10 m / s$ )

Discussion

15.	If one mole of an ideal monoatomic gas (γ=53) is mixed with one mole of ideal diatomic gas (γ=75), the value of γ for the mixture will be
Answer» If one mole of an ideal monoatomic gas $(γ = \frac{5}{3})$ is mixed with one mole of ideal diatomic gas $(γ = \frac{7}{5}),$ the value of $γ$ for the mixture will be

Discussion

16.	A parallel plate capacitor of capacity C has been charged so that the potential difference between its plates is V. Now the plates of this capacitor are connected to another uncharged capacitor of capacity 2C, the loss of energy in system is
Answer» A parallel plate capacitor of capacity C has been charged so that the potential difference between its plates is V. Now the plates of this capacitor are connected to another uncharged capacitor of capacity 2C, the loss of energy in system is

Discussion

17.	The resistance of pure platinum increases linearly with temperature (over a small range). We can use this property to measure temperature of different bodies, relative to a scale.If we scale the thermometer such that a resistance of 80 Ω denotes 0oC and 90 Ω denotes 100oC, what temperature will a resistance of 86 Ω denote?
Answer» The resistance of pure platinum increases linearly with temperature (over a small range). We can use this property to measure temperature of different bodies, relative to a scale. If we scale the thermometer such that a resistance of 80 Ω denotes $0^{o} C$ and 90 Ω denotes $100^{o} C$ , what temperature will a resistance of 86 Ω denote?

17.

The resistance of pure platinum increases linearly with temperature (over a small range). We can use this property to measure temperature of different bodies, relative to a scale.If we scale the thermometer such that a resistance of 80 Ω denotes 0oC and 90 Ω denotes 100oC, what temperature will a resistance of 86 Ω denote?

Answer»

The resistance of pure platinum increases linearly with temperature (over a small range). We can use this property to measure temperature of different bodies, relative to a scale.

If we scale the thermometer such that a resistance of 80 Ω denotes $0^{o} C$ and 90 Ω denotes $100^{o} C$ , what temperature will a resistance of 86 Ω denote?

Discussion

18.	The lower end of a capillary tube is dipped into water and it is seen that the water rises through 7.5 cm in the capillary. Find the radius of the capillary. Surface tension of water = 7.5 × 10-2 N m-1. Contact angle between water and glass = 0°. Take g = 10 m s-2.
Answer» The lower end of a capillary tube is dipped into water and it is seen that the water rises through 7.5 cm in the capillary. Find the radius of the capillary. Surface tension of water = 7.5 × 10^-2 N m^-1. Contact angle between water and glass = 0°. Take g = 10 m s^-2.

Discussion

19.	Both the blocks are resting on a horizontal floor and the pulley is held such that the string remains just taut. At the moment t=0, a force F=20t N starts acting on the pulley along vertically upward direction as shown in figure. Calculate the velocity of A as B loses contact with the floor. [Take g=10 m/s2]
Answer» Both the blocks are resting on a horizontal floor and the pulley is held such that the string remains just taut. At the moment $t = 0$ , a force $F = 20 t N$ starts acting on the pulley along vertically upward direction as shown in figure. Calculate the velocity of A as B loses contact with the floor. [Take $g = 10 {m/s}^{2}$ ]

Discussion

20.	A particle is moving along the positive x-axis and at t=0, the particle is at x=0. The acceleration of the particle is a function of time. The acceleration at any time t is given by a=2(1–[t])where [t] is the greatest integer function. Assuming that the particle is at rest initially, the correct graph to show the variation of velocity versus time for the interval 0<t<4 s is
Answer» A particle is moving along the positive $x$ -axis and at $t = 0$ , the particle is at $x = 0$ . The acceleration of the particle is a function of time. The acceleration at any time $t$ is given by $a = 2 (1 - [t])$ where $[t]$ is the greatest integer function. Assuming that the particle is at rest initially, the correct graph to show the variation of velocity versus time for the interval $0 < t < 4 s$ is

Discussion

21.	In case of a simple pendulum, the time period versus length graph is correctly depicted by:
Answer» In case of a simple pendulum, the time period versus length graph is correctly depicted by:

Discussion

22.	In a potentiometer circuit there is a cell of e.m.f 2V, a resistance of 5Ω and a wire of uniform thickness of length 1000 cm and resistance 15Ω. The potential gradient in the wire is
Answer» In a potentiometer circuit there is a cell of e.m.f 2V, a resistance of $5 Ω$ and a wire of uniform thickness of length 1000 cm and resistance $15 Ω$ . The potential gradient in the wire is

Discussion

23.	A set of four tuning forks can produce beat frequencies of 1,3,5,7 and 8 Hz when two of them are vibrated together. If lowest frequency among them is 550 Hz then other frequencies are
Answer» A set of four tuning forks can produce beat frequencies of $1, 3, 5, 7$ and $8$ $Hz$ when two of them are vibrated together. If lowest frequency among them is $550 Hz$ then other frequencies are

Discussion

24.	Three bodies of masses 1 kg, 3 kg and 4 kg have position vectors (^i+2^j+^k), (−3^i−2^j+^k) and (4^i) respectively . The centre of mass of this system has position vector
Answer» Three bodies of masses $1 kg$ , $3 kg$ and $4 kg$ have position vectors $(^i + 2^j +^k)$ , $(- 3^i - 2^j +^k)$ and $(4^i)$ respectively . The centre of mass of this system has position vector

Discussion

25.	why electron is not present in the nucleus of the atom
Answer» why electron is not present in the nucleus of the atom

Discussion

26.	Moment of the force, →F=(4^i+5^j−6^k) N at P(2,0,−3) m about the point Q(2,−2,−2) m is given by
Answer» Moment of the force, $\to F = (4^i + 5^j - 6^k) N$ at $P (2, 0, - 3) m$ about the point $Q (2, - 2, - 2) m$ is given by

Discussion

27.	A particle of charge Q and mass m is initially at rest at origin. Electric field is given by Ej while magnetic field is Bk. Find speed of particle when the coordinator of particle are (2π mv/qB,0,0).
Answer» A particle of charge Q and mass m is initially at rest at origin. Electric field is given by Ej while magnetic field is Bk. Find speed of particle when the coordinator of particle are (2π mv/qB,0,0).

Discussion

28.	Magnitude of repulsion rises as the distance separating the molecules:
Answer» Magnitude of repulsion rises as the distance separating the molecules:

Discussion

29.	The de Broglie wave length of a riffle bullet of mass 2 grams moving with a velocity of 2m/sec is
Answer» The de Broglie wave length of a riffle bullet of mass 2 grams moving with a velocity of 2m/sec is

Discussion

30.	A current I flows in a rectangular shaped wire whose centre lies at (x0,0,0) and whose vertices are located at the points A(x0+d,−a,−b), B(x0−d,a,−b), C(x0−d,a,+b) and D(x0+d,−a,+b) respectively. Assume that a,b,d<<x0. The magnitude of magnetic dipole moment vector of the rectangular wire frame is n A m2. The value of n is(integer only)(Given b=10 m, I=0.01 A, d=4 m, a=3 m)
Answer» A current $I$ flows in a rectangular shaped wire whose centre lies at $(x_{0}, 0, 0)$ and whose vertices are located at the points $A (x_{0} + d, - a, - b), B (x_{0} - d, a, - b), C (x_{0} - d, a, + b)$ and $D (x_{0} + d, - a, + b)$ respectively. Assume that $a, b, d << x_{0} .$ The magnitude of magnetic dipole moment vector of the rectangular wire frame is $n {A m}^{2}$ . The value of n is(integer only) (Given $b = 10 m, I = 0.01 A, d = 4 m, a = 3 m$ )

Discussion

31.	If the solenoid in Exercise 5.5 is free to turn about the verticaldirection and a uniform horizontal magnetic field of 0.25 T is applied,what is the magnitude of torque on the solenoid when its axis makesan angle of 30° with the direction of applied field?
Answer» If the solenoid in Exercise 5.5 is free to turn about the verticaldirection and a uniform horizontal magnetic field of 0.25 T is applied,what is the magnitude of torque on the solenoid when its axis makesan angle of 30° with the direction of applied field?

Discussion

32.	A 150 g block oscillates in SHM on the end of a spring with k=1500 N/m, according to the relation x=x0cos(ωt+ϕ). How long does the block take to move from the position +0.800 x0 to +0.600 x0 ?
Answer» A $150 g$ block oscillates in SHM on the end of a spring with $k = 1500 N/m$ , according to the relation $x = x_{0} cos (ω t + ϕ) .$ How long does the block take to move from the position $+ 0.800 x_{0}$ to $+ 0.600 x_{0}$ ?

Discussion

33.	A metallic rod is connected between two bodies at temperature Th and Tc (Th>Tc). P,Q and R are the points on the metallic rod along the length (point P being closer to body at temperature Th) where temperature readings are noted as T1,T2 and T3 respectively when the rod has reached steady state. Find the correct option.
Answer» A metallic rod is connected between two bodies at temperature $T_{h}$ and $T_{c} (T_{h} > T_{c})$ . $P, Q$ and $R$ are the points on the metallic rod along the length (point $P$ being closer to body at temperature $T_{h}$ ) where temperature readings are noted as $T_{1}, T_{2}$ and $T_{3}$ respectively when the rod has reached steady state. Find the correct option.

Discussion

34.	Solve the following problems.A. The resistance of a 1 m long nichrome wire is 6 Ω. If we reduce the length of the wire to 70 cm. what will its resistance be?B. When two resistors are connected in series, their effective resistance is 80 Ω. When they are connected in parallel, their effective resistance is 20 Ω. What are the values of the two resistances? C. If a charge of 420 C flows through a conducting wire in 5 minutes what is the value of the current?
Answer» Solve the following problems. A. The resistance of a 1 m long nichrome wire is 6 $Ω$ . If we reduce the length of the wire to 70 cm. what will its resistance be? B. When two resistors are connected in series, their effective resistance is 80 $Ω$ . When they are connected in parallel, their effective resistance is 20 $Ω$ . What are the values of the two resistances? C. If a charge of 420 C flows through a conducting wire in 5 minutes what is the value of the current?

Discussion

35.	sin 47°cos 43° + cos 47°sin 43° = ?(a) sin 4°(b) cos 4°(c) 1(d) 0
Answer» sin 47°cos 43° + cos 47°sin 43° = ? (a) sin 4° (b) cos 4° (c) 1 (d) 0

Discussion

36.	A particle is moving on a circular path with constantspeed v. It moves between two points A and Bwhich subtends an angle 60^° at the centre of circle.The magnitude of change in its velocity and changein magnitude of its velocity during motion from A toB are respectively
Answer» A particle is moving on a circular path with constantspeed v. It moves between two points A and Bwhich subtends an angle 60^° at the centre of circle.The magnitude of change in its velocity and changein magnitude of its velocity during motion from A toB are respectively

Discussion

37.	74.Two identical small bodies each if mass m and charge q are suspended from two strings each of length l from a fixed point.this whole system is taken into an orbiting artificial satellite,then find the tension in strings
Answer» 74.Two identical small bodies each if mass m and charge q are suspended from two strings each of length l from a fixed point.this whole system is taken into an orbiting artificial satellite,then find the tension in strings

Discussion

38.	What is the reading of ammeter in the figure. Assume that the internal resistance of battery is zero and the key is closed?
Answer» What is the reading of ammeter in the figure. Assume that the internal resistance of battery is zero and the key is closed?

38.

What is the reading of ammeter in the figure. Assume that the internal resistance of battery is zero and the key is closed?

Answer»

What is the reading of ammeter in the figure. Assume that the internal resistance of battery is zero and the key is closed?

Discussion

39.	Work done per mole in an isothermal change is
Answer» Work done per mole in an isothermal change is

Discussion

40.	Three concentric conducting spherical shells A,B and C with charge Q (inside A), 2Q (outer face of B) and 3Q (outer face of C) and radius R,2R and 4R are placed as shown in figure. Energy stored between shell A and B is
Answer» Three concentric conducting spherical shells $A, B$ and $C$ with charge $Q$ (inside $A$ ), $2 Q$ (outer face of $B$ ) and $3 Q$ (outer face of $C$ ) and radius $R, 2 R$ and $4 R$ are placed as shown in figure. Energy stored between shell $A$ and $B$ is

Discussion

41.	initially dipole is perpendicular to uniform electric field E. if dipole moment is p work done to rotate the dipole by an angle of 180 from this position i
Answer» initially dipole is perpendicular to uniform electric field E. if dipole moment is p work done to rotate the dipole by an angle of 180 from this position i

Discussion

42.	how current flows when majority(in forward bias)/minority(in reverse bias) charge carriers recombine in depletion region of pn junction?
Answer» how current flows when majority(in forward bias)/minority(in reverse bias) charge carriers recombine in depletion region of pn junction?

Discussion

43.	A ray of light falls on the surface of a spherical glass paper weight making an angle α with the normal and is refracted in the medium at an angle β. The angle of deviation of the emergent ray from the direction of the incident ray
Answer» A ray of light falls on the surface of a spherical glass paper weight making an angle $α$ with the normal and is refracted in the medium at an angle $β$ . The angle of deviation of the emergent ray from the direction of the incident ray

Discussion

44.	For a given velocity, a projectile has the same range R for two angles of projection, if t1 and t2 are the times of flight in the two cases then
Answer» For a given velocity, a projectile has the same range R for two angles of projection, if $t_{1} a n d t_{2}$ are the times of flight in the two cases then

Discussion

45.	24.19. The equation of a simple harmonic wave is given byy 3in (50t x), where x and y are in metresand t is in seconds. The ratio of maximum particle2velocity to the wave velocity isAIPMT (Mains)-2012\rbrack3223(1)225.(3)320. A train moving at a speed of 220 ms1 towards a
Answer» 24.19. The equation of a simple harmonic wave is given byy 3in (50t x), where x and y are in metresand t is in seconds. The ratio of maximum particle2velocity to the wave velocity isAIPMT (Mains)-2012\rbrack3223(1)225.(3)320. A train moving at a speed of 220 ms1 towards a

Discussion

46.	A 4-bit MOD-6 ripple counter uses J-K flip-flop. If propagation delay of each flip-flop is 20nsec, then the maximum clock frequency used is______MHz.12.5
Answer» A 4-bit MOD-6 ripple counter uses J-K flip-flop. If propagation delay of each flip-flop is 20nsec, then the maximum clock frequency used is______ $M H z .$ 12.5

Discussion

47.	A particle is thrown with the speed u at an angle alpha with the horizontal. When the particle makes an angle beeta with the horizontal ,it's speed will be
Answer» A particle is thrown with the speed u at an angle alpha with the horizontal. When the particle makes an angle beeta with the horizontal ,it's speed will be

Discussion

48.	12.Draw a circuit diagram showing a dry cell connected to a bulb through a switch.Mark the positive and the negative terminals of the cell,and the direction of flow of a.electron, b.conventional current
Answer» 12.Draw a circuit diagram showing a dry cell connected to a bulb through a switch.Mark the positive and the negative terminals of the cell,and the direction of flow of a.electron, b.conventional current

Discussion

49.	find the angular velocity of earth surface
Answer» find the angular velocity of earth surface

Discussion

50.	The projectile motion of a particle of mass 5 g is shown in the figure. The initial velocity of the particle is 5√2 ms−1 and the air resistance is assumed to be negligible. The magnitude of the change in momentum of the particles between the points A and B is x×10−2 kg-ms−1. The value of x, to the nearest integer, is _____.
Answer» The projectile motion of a particle of mass $5 g$ is shown in the figure. The initial velocity of the particle is $5 \sqrt{2} {ms}^{- 1}$ and the air resistance is assumed to be negligible. The magnitude of the change in momentum of the particles between the points $A$ and $B$ is $x \times 10^{- 2} {kg-ms}^{- 1}$ . The value of $x$ , to the nearest integer, is _____.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is the number of reflection and refraction taking place in water droplet in a primary rainbow?

Let g(t)=π/2∫−π/2cos(π4t+f(x))dx, where f(x)=loge(x+√x2+1),x∈R. Then which one of the following is correct:

A cannon B and a target are 0.98 km apart located at the same level. Find the time taken to hit the target, if the speed of the shell fired by the cannon is 98 m/s. Neglect the air drag and take g=9.8 m/s2.

One main scale division of a Vernier calliper is ′a′ cm and the nth division of the Vernier scale coincides with the (n−1)th division of the main scale. The least count of the calliper (in mm) is:

A cylinder rolls without slipping down an inclined plane, the number of degrees of freedom it has, is

105.There is a cubicalcopy room ABCD with the wall CD as a plane mirror .each side of the room is 3m . We place a camera at the midpoint of the wall AB .at what distance should the camera be focused to photograph of image of an object at A (1)1.6m (2)3m (3)6m (4)6.18m

If →P=→Q then which of the following is NOT correct

A mass m has given a charge +q is attached at the end of a light rod. A horizontal uniform electric field is exist as shown in the figure. If the mass is released from the position shown in figure, find the angular velocity of the rod when it passes through the bottom most position.

Circuit is as shown in the figure. Initially, the key is connected to 1 and now shifted to 2, before shifting of key, energy stored in capacitor is U1 and after shifting of key, energy stored in capacitor is U2, then U1U2 will be

The radii of the two columns in U-tube are r1 and r2. When a liquid of density ρ (angle of contact is 0∘) is filled in it, the level difference of liquid in two arms is h. The surface tension of liquid is (g= acceleration due to gravity and r1&lt;r1)

39.calculate the rms speed of an ideal diatomic gas having molecular weight 32 gm/mol at 0 degree c. if the specific heats at constant pressure and volume are respectively 8.3 j/mol k and 6.34 cal/mol k respectively.

A particle of mass 107 kg is moving in the positive direction of x. Its initial position is x = 0 and initial velocity is 1 m/s. Find the velocity in m/s at x = 10 m, if power at x=0 is 2 watts

If one mole of an ideal monoatomic gas (γ=53) is mixed with one mole of ideal diatomic gas (γ=75), the value of γ for the mixture will be

A parallel plate capacitor of capacity C has been charged so that the potential difference between its plates is V. Now the plates of this capacitor are connected to another uncharged capacitor of capacity 2C, the loss of energy in system is

The lower end of a capillary tube is dipped into water and it is seen that the water rises through 7.5 cm in the capillary. Find the radius of the capillary. Surface tension of water = 7.5 × 10-2 N m-1. Contact angle between water and glass = 0°. Take g = 10 m s-2.

In case of a simple pendulum, the time period versus length graph is correctly depicted by:

In a potentiometer circuit there is a cell of e.m.f 2V, a resistance of 5Ω and a wire of uniform thickness of length 1000 cm and resistance 15Ω. The potential gradient in the wire is

A set of four tuning forks can produce beat frequencies of 1,3,5,7 and 8 Hz when two of them are vibrated together. If lowest frequency among them is 550 Hz then other frequencies are

Three bodies of masses 1 kg, 3 kg and 4 kg have position vectors (^i+2^j+^k), (−3^i−2^j+^k) and (4^i) respectively . The centre of mass of this system has position vector

why electron is not present in the nucleus of the atom

Moment of the force, →F=(4^i+5^j−6^k) N at P(2,0,−3) m about the point Q(2,−2,−2) m is given by

A particle of charge Q and mass m is initially at rest at origin. Electric field is given by Ej while magnetic field is Bk. Find speed of particle when the coordinator of particle are (2π mv/qB,0,0).

Magnitude of repulsion rises as the distance separating the molecules:

The de Broglie wave length of a riffle bullet of mass 2 grams moving with a velocity of 2m/sec is

If the solenoid in Exercise 5.5 is free to turn about the verticaldirection and a uniform horizontal magnetic field of 0.25 T is applied,what is the magnitude of torque on the solenoid when its axis makesan angle of 30° with the direction of applied field?

A 150 g block oscillates in SHM on the end of a spring with k=1500 N/m, according to the relation x=x0cos(ωt+ϕ). How long does the block take to move from the position +0.800 x0 to +0.600 x0 ?

sin 47°cos 43° + cos 47°sin 43° = ?(a) sin 4°(b) cos 4°(c) 1(d) 0

A particle is moving on a circular path with constantspeed v. It moves between two points A and Bwhich subtends an angle 60^° at the centre of circle.The magnitude of change in its velocity and changein magnitude of its velocity during motion from A toB are respectively

74.Two identical small bodies each if mass m and charge q are suspended from two strings each of length l from a fixed point.this whole system is taken into an orbiting artificial satellite,then find the tension in strings

What is the reading of ammeter in the figure. Assume that the internal resistance of battery is zero and the key is closed?

Work done per mole in an isothermal change is

Three concentric conducting spherical shells A,B and C with charge Q (inside A), 2Q (outer face of B) and 3Q (outer face of C) and radius R,2R and 4R are placed as shown in figure. Energy stored between shell A and B is

initially dipole is perpendicular to uniform electric field E. if dipole moment is p work done to rotate the dipole by an angle of 180 from this position i

how current flows when majority(in forward bias)/minority(in reverse bias) charge carriers recombine in depletion region of pn junction?

A ray of light falls on the surface of a spherical glass paper weight making an angle α with the normal and is refracted in the medium at an angle β. The angle of deviation of the emergent ray from the direction of the incident ray

For a given velocity, a projectile has the same range R for two angles of projection, if t1 and t2 are the times of flight in the two cases then

24.19. The equation of a simple harmonic wave is given byy 3in (50t x), where x and y are in metresand t is in seconds. The ratio of maximum particle2velocity to the wave velocity isAIPMT (Mains)-2012\rbrack3223(1)225.(3)320. A train moving at a speed of 220 ms1 towards a

A 4-bit MOD-6 ripple counter uses J-K flip-flop. If propagation delay of each flip-flop is 20nsec, then the maximum clock frequency used is______MHz.12.5

A particle is thrown with the speed u at an angle alpha with the horizontal. When the particle makes an angle beeta with the horizontal ,it's speed will be

12.Draw a circuit diagram showing a dry cell connected to a bulb through a switch.Mark the positive and the negative terminals of the cell,and the direction of flow of a.electron, b.conventional current

find the angular velocity of earth surface

The radii of the two columns in U-tube are r1 and r2. When a liquid of density ρ (angle of contact is 0∘) is filled in it, the level difference of liquid in two arms is h. The surface tension of liquid is (g= acceleration due to gravity and r1<r1)