50278 + Interview Questions in Physics

1.	Plot a graph between force vs r(square) for each pair of charges given below: Pair 1: 1C & 2C Pair 2: 2C & (-3C)
Answer» Plot a graph between force vs r(square) for each pair of charges given below: Pair 1: 1C & 2C Pair 2: 2C & (-3C)

Discussion

2.	A diffraction pattern is produced by a single slit of width 0.5 mm with the help of a convex lens of focal length 40 cm. If the wavelength of light used is 5896 ˚A. The distance of the first dark fringe from the axis will be
Answer» A diffraction pattern is produced by a single slit of width $0.5 mm$ with the help of a convex lens of focal length $40 cm .$ If the wavelength of light used is $5896 ˚ A$ . The distance of the first dark fringe from the axis will be

Discussion

3.	A hydraulically efficient trapezoidal channel section has side slopes of 2V : 1H. The ratio of Byn for the channel shown below is .1.236
Answer» A hydraulically efficient trapezoidal channel section has side slopes of 2V : 1H. The ratio of $\frac{B}{y_{n}}$ for the channel shown below is . 1.236

Discussion

4.	Derive the expression for the capacitance of a parallel plate capacitor with no dielectric medium between the plates
Answer» Derive the expression for the capacitance of a parallel plate capacitor with no dielectric medium between the plates

Discussion

5.	A hollow spherical ball of radius 20 cm floats in still water, half of its volume submerged. Taking the density of water as 1000m/s3, and the acceleration due to gravity as 10 m/s2, the natural frequency of small oscillations of the ball, normal to the water surface is radians/s (roundoff to 2 decimal places).
Answer» A hollow spherical ball of radius 20 cm floats in still water, half of its volume submerged. Taking the density of water as 1000m/s $^{3}$ , and the acceleration due to gravity as 10 m/s $^{2}$ , the natural frequency of small oscillations of the ball, normal to the water surface is radians/s (roundoff to 2 decimal places).

Discussion

6.	if momentum is increased by 20% then what is increased percentage of kinetic energy?
Answer» if momentum is increased by 20% then what is increased percentage of kinetic energy?

Discussion

7.	A particle is dropped from a tower in a uniform gravitational field at t=0. The particle is blown over by a horizontal wind with constant velocity. Slope (m) of trajectory of the particle with horizontal and its kinetic energy vary according to the curves.
Answer» A particle is dropped from a tower in a uniform gravitational field at $t = 0$ . The particle is blown over by a horizontal wind with constant velocity. Slope (m) of trajectory of the particle with horizontal and its kinetic energy vary according to the curves.

Discussion

8.	A ball is thrown up with a certain velocity at an angle θ to the horizontal . The kinetic energy KE of theball varies with horizontal displacement x as
Answer» A ball is thrown up with a certain velocity at an angle θ to the horizontal . The kinetic energy KE of the ball varies with horizontal displacement x as

Discussion

9.	The displacement of an oscillating particle varies with time (in seconds) according to the equation y (cm) = sin π2(t2+13) . The maximum acceleration of the particle is approximately
Answer» The displacement of an oscillating particle varies with time (in seconds) according to the equation y (cm) = sin $\frac{π}{2} (\frac{t}{2} + \frac{1}{3})$ . The maximum acceleration of the particle is approximately

Discussion

10.	Explain the concept of RELATIVE ANGULAR VELOCITY in lucid way ?
Answer» Explain the concept of RELATIVE ANGULAR VELOCITY in lucid way ?

Discussion

11.	A ball is dropped on the floor from a height of 10 m. It rebounds to a height of 2.5 m. If the ball is in contact with the floor for 0.01 sec, the average acceleration during contact is
Answer» A ball is dropped on the floor from a height of 10 m. It rebounds to a height of 2.5 m. If the ball is in contact with the floor for 0.01 sec, the average acceleration during contact is

Discussion

12.	A square of side 3cm is placed at a distance of 25cm from a concave mirror of focal length 10cm. The centre of the square is at the axis of the mirror and the plane is normal to the axis. The area enclosed by the image of the square is
Answer» A square of side 3cm is placed at a distance of 25cm from a concave mirror of focal length 10cm. The centre of the square is at the axis of the mirror and the plane is normal to the axis. The area enclosed by the image of the square is

12.

A square of side 3cm is placed at a distance of 25cm from a concave mirror of focal length 10cm. The centre of the square is at the axis of the mirror and the plane is normal to the axis. The area enclosed by the image of the square is

Answer»

A square of side 3cm is placed at a distance of 25cm from a concave mirror

of focal length 10cm. The centre of the square is at the axis of the mirror and

the plane is normal to the axis. The area enclosed by the image of the square

is

Discussion

13.	A ring having radius 2.5 cm and mass 10 gram floats on a liquid surface having surface tension 0.06 N/m. Find force required to just lift the ring from liquid surface.
Answer» A ring having radius $2.5 cm$ and mass $10 gram$ floats on a liquid surface having surface tension $0.06 N/m$ . Find force required to just lift the ring from liquid surface.

Discussion

14.	The metalic bob of a simple pendulum has the relative density ρ . The time period of this pendulum is T . If the metallic bob is immeresed in water then the new tme period is given by
Answer» The metalic bob of a simple pendulum has the relative density ρ . The time period of this pendulum is T . If the metallic bob is immeresed in water then the new tme period is given by

Discussion

15.	A particle starting from rest undergoes acceleration given by a=\|t–2\| m/s2 where, t is time in second. Velocity of particle after 4 sec is
Answer» A particle starting from rest undergoes acceleration given by $a = \| t - 2 \| {m/s}^{2}$ where, $t$ is time in second. Velocity of particle after $4 sec$ is

Discussion

16.	If I1, I2, I3 and I4 are the respective r.m.s. values of the time varying currents as shown in the four cases I, II, III and IV. Then identify the correct relations.
Answer» If $I_{1}, I_{2}, I_{3}$ and $I_{4}$ are the respective r.m.s. values of the time varying currents as shown in the four cases $I, II, III$ and $IV$ . Then identify the correct relations.

Discussion

17.	A particle of charge q and mass m enters normally (at point P) in a region of magnetic field with speed V. It comes out normally from Q after time T as shown in the figure. The magnetic field B is present only in the region of radius R and is uniform. Initial and final velocities are along radial direction, and they are perpendicular to each other. For this to happen, which of the following expression(s) is/are correct?
Answer» A particle of charge $q$ and mass $m$ enters normally $($ at point $P)$ in a region of magnetic field with speed $V$ . It comes out normally from $Q$ after time $T$ as shown in the figure. The magnetic field $B$ is present only in the region of radius $R$ and is uniform. Initial and final velocities are along radial direction, and they are perpendicular to each other. For this to happen, which of the following expression(s) is/are correct?

Discussion

18.	Three equal point charges with charge +q each are moving along a circle of radius R and a fixed point charge −2q is placed at the centre of the circle. If +q charges are revolving at constant speed around −2q as shown, then the speed of charges are(Assume that charges (+q) form vertices of equilateral triangle)
Answer» Three equal point charges with charge $+ q$ each are moving along a circle of radius $R$ and a fixed point charge $- 2 q$ is placed at the centre of the circle. If $+ q$ charges are revolving at constant speed around $- 2 q$ as shown, then the speed of charges are (Assume that charges $(+ q)$ form vertices of equilateral triangle)

Discussion

19.	If V be the change in potential between two neighbouring points r apart, then the magnitude of electric field E is given by (1)E = ∆V * ∆r(2)E = ∆V / ∆r(3)E = ∆r / ∆V(4)E = (∆V)^2/ ∆r
Answer» If V be the change in potential between two neighbouring points r apart, then the magnitude of electric field E is given by (1)E = ∆V * ∆r (2)E = ∆V / ∆r (3)E = ∆r / ∆V (4)E = (∆V)^2/ ∆r

Discussion

20.	The densities of two solid spheres A and B of the same radii R vary with radial distance r as ρA(r)=k(rR) and ρB(r)=k(rR)5, respectively, where k is a constant. The moments of inertia of the individual spheres about axis passing through their centres are IA and IB respectively. If IBIA=n10, then value of n is-
Answer» The densities of two solid spheres A and B of the same radii R vary with radial distance r as $ρ_{A} (r) = k (\frac{r}{R})$ and $ρ_{B} (r) = k {(\frac{r}{R})}^{5}$ , respectively, where $k$ is a constant. The moments of inertia of the individual spheres about axis passing through their centres are $I_{A}$ and $I_{B}$ respectively. If $\frac{I_{B}}{I_{A}} = \frac{n}{10}$ , then value of $n$ is-

Discussion

21.	Which of the following potential energy curves in Fig. 6.18 cannot possibly describe the elastic collision of two billiard balls ? Here r is the distance between centres of the balls.
Answer» Which of the following potential energy curves in Fig. 6.18 cannot possibly describe the elastic collision of two billiard balls ? Here r is the distance between centres of the balls.

Discussion

22.	Two cities A and B are connected by a regular bus service with buses plying in either direction every T seconds . The speed of each bus is uniform and equal to Vb. A cyclist cycles from A to B with a uniform speed of Vc. A bus goes past the cyclist in T1 second in the direction A to B and every T2 second in the direction B to A. Then
Answer» Two cities $A$ and $B$ are connected by a regular bus service with buses plying in either direction every $T$ seconds . The speed of each bus is uniform and equal to $V_{b}$ . A cyclist cycles from $A$ to $B$ with a uniform speed of $V_{c}$ . A bus goes past the cyclist in $T_{1}$ second in the direction $A$ to $B$ and every $T_{2}$ second in the direction $B$ to $A$ . Then

Discussion

23.	The intensity of light at a distance r from the axis of a long cylindrical source is proportional to :
Answer» The intensity of light at a distance $r$ from the axis of a long cylindrical source is proportional to :

Discussion

24.	All the particles of a body are situated at a distance R from the origin. The distance of the centre of mass of the body from the origin is
Answer» All the particles of a body are situated at a distance $R$ from the origin. The distance of the centre of mass of the body from the origin is

Discussion

25.	2.What is ideal gas and real gas , it's properties and when was discovered, by whom?
Answer» 2.What is ideal gas and real gas , it's properties and when was discovered, by whom?

Discussion

26.	A block of mass M is tied to a fixed point C on a horizontal table through a string passing round a massless smooth pulley B. A force F is applied applied by the experimenter to the pulley. If the pulley is displaced by a distance x, then by what distance is the block displaced? Find the acceleration of the block and the pulley.
Answer» A block of mass M is tied to a fixed point C on a horizontal table through a string passing round a massless smooth pulley B. A force F is applied applied by the experimenter to the pulley. If the pulley is displaced by a distance x, then by what distance is the block displaced? Find the acceleration of the block and the pulley.

Discussion

27.	118. A long string with a charge of lambda per unit length passes through an imaginary cube of edge a the maximum flux of electric field through the cube is.
Answer» 118. A long string with a charge of lambda per unit length passes through an imaginary cube of edge a the maximum flux of electric field through the cube is.

Discussion

28.	A charged particle (mass m and charge q) moves along x−axis with velocity v0. When it passes through the origin, it enters a region having uniform electric field E=−E^j which extends up to x=d. The equation of path of electron in the region x>d is :
Answer» A charged particle $(mass m and charge q)$ moves along $x - axis$ with velocity $v_{0}$ . When it passes through the origin, it enters a region having uniform electric field $E = - E^j$ which extends up to $x = d$ . The equation of path of electron in the region $x > d$ is :

Discussion

29.	A battery of internal resistance r having no load resistance has an e.m.f. E volt. What is the observed e.m.f across the terminals of the battery when a load resistance R(=r) is connected to its terminals?
Answer» A battery of internal resistance $r$ having no load resistance has an e.m.f. $E$ volt. What is the observed e.m.f across the terminals of the battery when a load resistance $R (= r)$ is connected to its terminals?

Discussion

30.	Two balls A and B of same mass are thrown from the top of the building. A thrown upward with velocity v and B, thrown down with velocity v, then:- (1) velocity A is more than B at the ground (2) velocity of B is more than A at the ground (3) both A and B strike the ground with same velocity (4) none of the
Answer» Two balls A and B of same mass are thrown from the top of the building. A thrown upward with velocity v and B, thrown down with velocity v, then:- (1) velocity A is more than B at the ground (2) velocity of B is more than A at the ground (3) both A and B strike the ground with same velocity (4) none of the

Discussion

31.	Four identical point charges, each of charge q, are placed on the vertices of a regular hexagon of side a such that the net electric field at centre of hexagon is zero. If one of the charge is now removed, then the electric field at centre of hexagon is
Answer» Four identical point charges, each of charge q, are placed on the vertices of a regular hexagon of side a such that the net electric field at centre of hexagon is zero. If one of the charge is now removed, then the electric field at centre of hexagon is

Discussion

32.	A room is maintained at 20∘ C by a heater of resistance 20ohmconnected to 200voltmains. The temperature is uniform through out the room and heat is transmitted through a glass window of area 1 m2 and thickness 0.2cm. What will be the temperature outside? Given that thermal conductivityKfor glass is 0.2 cal/m/°C andJ= 4.2J/cal
Answer» A room is maintained at $20^{\circ} C$ by a heater of resistance 20ohmconnected to 200voltmains. The temperature is uniform through out the room and heat is transmitted through a glass window of area 1 $m^{2}$ and thickness 0.2cm. What will be the temperature outside? Given that thermal conductivityKfor glass is 0.2 cal/m/°C andJ= 4.2J/cal

32.

A room is maintained at 20∘ C by a heater of resistance 20ohmconnected to 200voltmains. The temperature is uniform through out the room and heat is transmitted through a glass window of area 1 m2 and thickness 0.2cm. What will be the temperature outside? Given that thermal conductivityKfor glass is 0.2 cal/m/°C andJ= 4.2J/cal

Answer»

A room is maintained at $20^{\circ} C$ by a heater of resistance 20ohmconnected to 200voltmains. The temperature is uniform through out the room and heat is transmitted through a glass window of area 1 $m^{2}$ and thickness 0.2cm. What will be the temperature outside? Given that thermal conductivityKfor glass is 0.2 cal/m/°C andJ= 4.2J/cal

Discussion

33.	A circular coil of radius 5 cm carries an electric current I and magnetic field at the centre is B. The magnetic field due to the coil at a point 5 m from the centre on the axis will be -
Answer» A circular coil of radius $5 cm$ carries an electric current $I$ and magnetic field at the centre is $B$ . The magnetic field due to the coil at a point $5 m$ from the centre on the axis will be -

Discussion

34.	If the surface shown in the figure is frictionless, and T2=6√3 N , find F.
Answer» If the surface shown in the figure is frictionless, and $T_{2} = 6 \sqrt{3} N$ , find $F$ .

Discussion

35.	Consider three charges q1, q2, q3 each equal to q at the vertices of an equilateral triangle of side l. What is the force on a charge Q(with the same sin as q) placed at the centroid of the triangle?
Answer» Consider three charges q1, q2, q3 each equal to q at the vertices of an equilateral triangle of side l. What is the force on a charge Q(with the same sin as q) placed at the centroid of the triangle?

Discussion

36.	Consider, the two identical containers, one with 1 mole of H2 and the other with 1 mole of He. If the root mean square (RMS) velocities of the two gases are the same, then the ratio of the temperatures, T(H2)T(He) is a:b. Find the value of a+b.
Answer» Consider, the two identical containers, one with 1 mole of $H_{2}$ and the other with 1 mole of $H e$ . If the root mean square (RMS) velocities of the two gases are the same, then the ratio of the temperatures, $\frac{T_{(H_{2})}}{T_{(H e)}}$ is $a : b$ . Find the value of $a + b$ .

Discussion

37.	Point charges +4q, -q, +4q are kept on the x-axis at points x=0, x=a,x=2a respectively... OPTIONS 1. Only -q is in stable equilibrium 2. All the charges are in stable eqbm 3.all the charges are in unstable eqbm 4. None of the charges are in eqbm Sir ,please ..do provide the explanation or steps alongwith the right option ..so it's easily understood.
Answer» Point charges +4q, -q, +4q are kept on the x-axis at points x=0, x=a,x=2a respectively... OPTIONS 1. Only -q is in stable equilibrium 2. All the charges are in stable eqbm 3.all the charges are in unstable eqbm 4. None of the charges are in eqbm Sir ,please ..do provide the explanation or steps alongwith the right option ..so it's easily understood.

Discussion

38.	A particle of mass m moving eastwards with a speed v collides with another particle of same mass moving northwards with same speed v. The two particles coalesces on collision. Then, the new particle of mass 2m will move with velocity:
Answer» A particle of mass $m$ moving eastwards with a speed $v$ collides with another particle of same mass moving northwards with same speed $v$ . The two particles coalesces on collision. Then, the new particle of mass $2 m$ will move with velocity:

Discussion

39.	A symmetric star shaped conducting wire loop is carrying a steady state current I as shown the figure. The distance between the diametrically opposite vertices of the star is 4a. The magnitude of the magnetic field at the center of the loop is
Answer» A symmetric star shaped conducting wire loop is carrying a steady state current $I$ as shown the figure. The distance between the diametrically opposite vertices of the star is $4 a$ . The magnitude of the magnetic field at the center of the loop is

Discussion

40.	if v =x^2-5x+4 ,find the acceration of the particle when velocity of the particle is
Answer» if v =x^2-5x+4 ,find the acceration of the particle when velocity of the particle is

Discussion

41.	5.What is projectile motion.
Answer» 5.What is projectile motion.

Discussion

42.	A rigid bod y in the shape of a “V” has two equal arms made of uniform rods. What must the angle between the two rods be so that when the body is suspended from one end, the other arm is horizontal?
Answer» A rigid bod y in the shape of a “V” has two equal arms made of uniform rods. What must the angle between the two rods be so that when the body is suspended from one end, the other arm is horizontal?

Discussion

43.	A quantity of an ideal monoatomic gas consists of n moles initially at temperature T1. The pressure and volume both are then slowly doubled in such a manner that the process traces out a straight line on a P−V diagram. The ratio QnRT1 for the given thermodynamic process is equal to:(Q is the heat supplied to the gas)
Answer» A quantity of an ideal monoatomic gas consists of $n$ moles initially at temperature $T_{1}$ . The pressure and volume both are then slowly doubled in such a manner that the process traces out a straight line on a $P - V$ diagram. The ratio $\frac{Q}{n R T_{1}}$ for the given thermodynamic process is equal to: (Q is the heat supplied to the gas)

Discussion

44.	The path difference between the two waves y1=a1sin(ω t−2π xλ) and y2=a2cos(ω t−2π xλ+ϕ)is
Answer» The path difference between the two waves $y_{1} = a_{1} sin (ω t - \frac{2 π x}{λ})$ and $y_{2} = a_{2} cos (ω t - \frac{2 π x}{λ} + ϕ) i s$

Discussion

45.	The position x (in m) of a particle along a straight line is given as x=3t^2-18t. The maximum speed in the time interval t=0 to t=2s is
Answer» The position x (in m) of a particle along a straight line is given as x=3t^2-18t. The maximum speed in the time interval t=0 to t=2s is

Discussion

46.	∫14+9x2dx is equal to (where C is constant of integration)
Answer» $\int \frac{1}{4 + 9 x^{2}} d x$ is equal to (where $C$ is constant of integration)

Discussion

47.	If you heat a circular disk with a hole, what change do you expect in the diameter of the hole? Remember that the effect of heating increases the separation between any pair of particles.
Answer» If you heat a circular disk with a hole, what change do you expect in the diameter of the hole? Remember that the effect of heating increases the separation between any pair of particles.

Discussion

48.	The breaking stress of the metal used for the wire connecting the blocks is 2×109 N/m2. Minimum radius of the wire is:[Take √4006π=4.60 ,g=10 m/s2 for calculation.]
Answer» The breaking stress of the metal used for the wire connecting the blocks is $2 \times 10^{9} {N/m}^{2}$ . Minimum radius of the wire is: [Take $\sqrt{\frac{400}{6 π}} = 4.60, g = 10 {m/s}^{2}$ for calculation.]

Discussion

49.	The equation of a wave on a string is y = 4sin pie/2(8t-lambda/8), then find the velocity of the wave?
Answer» The equation of a wave on a string is y = 4sin pie/2(8t-lambda/8), then find the velocity of the wave?

Discussion

50.	The reading of a pressure meter attached with a closed water pipe is 3.5 x 10 power 5 N/m^2.this reading falls to 1 x 10 power 5 N/m^2 when the valve is opened .What is the speed of water flowing through the pipe
Answer» The reading of a pressure meter attached with a closed water pipe is 3.5 x 10 power 5 N/m^2.this reading falls to 1 x 10 power 5 N/m^2 when the valve is opened .What is the speed of water flowing through the pipe

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Plot a graph between force vs r(square) for each pair of charges given below: Pair 1: 1C & 2C Pair 2: 2C & (-3C)

A diffraction pattern is produced by a single slit of width 0.5 mm with the help of a convex lens of focal length 40 cm. If the wavelength of light used is 5896 ˚A. The distance of the first dark fringe from the axis will be

A hydraulically efficient trapezoidal channel section has side slopes of 2V : 1H. The ratio of Byn for the channel shown below is .1.236

Derive the expression for the capacitance of a parallel plate capacitor with no dielectric medium between the plates

if momentum is increased by 20% then what is increased percentage of kinetic energy?

A particle is dropped from a tower in a uniform gravitational field at t=0. The particle is blown over by a horizontal wind with constant velocity. Slope (m) of trajectory of the particle with horizontal and its kinetic energy vary according to the curves.

A ball is thrown up with a certain velocity at an angle θ to the horizontal . The kinetic energy KE of theball varies with horizontal displacement x as

The displacement of an oscillating particle varies with time (in seconds) according to the equation y (cm) = sin π2(t2+13) . The maximum acceleration of the particle is approximately

Explain the concept of RELATIVE ANGULAR VELOCITY in lucid way ?

A ball is dropped on the floor from a height of 10 m. It rebounds to a height of 2.5 m. If the ball is in contact with the floor for 0.01 sec, the average acceleration during contact is

A square of side 3cm is placed at a distance of 25cm from a concave mirror of focal length 10cm. The centre of the square is at the axis of the mirror and the plane is normal to the axis. The area enclosed by the image of the square is

A ring having radius 2.5 cm and mass 10 gram floats on a liquid surface having surface tension 0.06 N/m. Find force required to just lift the ring from liquid surface.

The metalic bob of a simple pendulum has the relative density ρ . The time period of this pendulum is T . If the metallic bob is immeresed in water then the new tme period is given by

A particle starting from rest undergoes acceleration given by a=|t–2| m/s2 where, t is time in second. Velocity of particle after 4 sec is

If I1, I2, I3 and I4 are the respective r.m.s. values of the time varying currents as shown in the four cases I, II, III and IV. Then identify the correct relations.

If V be the change in potential between two neighbouring points r apart, then the magnitude of electric field E is given by (1)E = ∆V * ∆r(2)E = ∆V / ∆r(3)E = ∆r / ∆V(4)E = (∆V)^2/ ∆r

Which of the following potential energy curves in Fig. 6.18 cannot possibly describe the elastic collision of two billiard balls ? Here r is the distance between centres of the balls.

The intensity of light at a distance r from the axis of a long cylindrical source is proportional to :

All the particles of a body are situated at a distance R from the origin. The distance of the centre of mass of the body from the origin is

2.What is ideal gas and real gas , it's properties and when was discovered, by whom?

118. A long string with a charge of lambda per unit length passes through an imaginary cube of edge a the maximum flux of electric field through the cube is.

A charged particle (mass m and charge q) moves along x−axis with velocity v0. When it passes through the origin, it enters a region having uniform electric field E=−E^j which extends up to x=d. The equation of path of electron in the region x&gt;d is :

A battery of internal resistance r having no load resistance has an e.m.f. E volt. What is the observed e.m.f across the terminals of the battery when a load resistance R(=r) is connected to its terminals?

Four identical point charges, each of charge q, are placed on the vertices of a regular hexagon of side a such that the net electric field at centre of hexagon is zero. If one of the charge is now removed, then the electric field at centre of hexagon is ​

A circular coil of radius 5 cm carries an electric current I and magnetic field at the centre is B. The magnetic field due to the coil at a point 5 m from the centre on the axis will be -

If the surface shown in the figure is frictionless, and T2=6√3 N , find F.

Consider three charges q1, q2, q3 each equal to q at the vertices of an equilateral triangle of side l. What is the force on a charge Q(with the same sin as q) placed at the centroid of the triangle?

Consider, the two identical containers, one with 1 mole of H2 and the other with 1 mole of He. If the root mean square (RMS) velocities of the two gases are the same, then the ratio of the temperatures, T(H2)T(He) is a:b. Find the value of a+b.

A particle of mass m moving eastwards with a speed v collides with another particle of same mass moving northwards with same speed v. The two particles coalesces on collision. Then, the new particle of mass 2m will move with velocity:

A symmetric star shaped conducting wire loop is carrying a steady state current I as shown the figure. The distance between the diametrically opposite vertices of the star is 4a. The magnitude of the magnetic field at the center of the loop is

if v =x^2-5x+4 ,find the acceration of the particle when velocity of the particle is

5.What is projectile motion.

A rigid bod y in the shape of a “V” has two equal arms made of uniform rods. What must the angle between the two rods be so that when the body is suspended from one end, the other arm is horizontal?

The path difference between the two waves y1=a1sin(ω t−2π xλ) and y2=a2cos(ω t−2π xλ+ϕ)is

The position x (in m) of a particle along a straight line is given as x=3t^2-18t. The maximum speed in the time interval t=0 to t=2s is

∫14+9x2dx is equal to (where C is constant of integration)

If you heat a circular disk with a hole, what change do you expect in the diameter of the hole? Remember that the effect of heating increases the separation between any pair of particles.

The breaking stress of the metal used for the wire connecting the blocks is 2×109 N/m2. Minimum radius of the wire is:[Take √4006π=4.60 ,g=10 m/s2 for calculation.]

The equation of a wave on a string is y = 4sin pie/2(8t-lambda/8), then find the velocity of the wave?

The reading of a pressure meter attached with a closed water pipe is 3.5 x 10 power 5 N/m^2.this reading falls to 1 x 10 power 5 N/m^2 when the valve is opened .What is the speed of water flowing through the pipe

A charged particle (mass m and charge q) moves along x−axis with velocity v0. When it passes through the origin, it enters a region having uniform electric field E=−E^j which extends up to x=d. The equation of path of electron in the region x>d is :

Four identical point charges, each of charge q, are placed on the vertices of a regular hexagon of side a such that the net electric field at centre of hexagon is zero. If one of the charge is now removed, then the electric field at centre of hexagon is