50278 + Interview Questions in Physics

1.	A point charge +q is placed on the axis of a ring of radius R at distance r from the centre ,then electric flux through the ring due to the point charge will be
Answer» A point charge +q is placed on the axis of a ring of radius R at distance r from the centre ,then electric flux through the ring due to the point charge will be

Discussion

2.	for pure rolling ofround object as shown the velocity of centre of mass i
Answer» for pure rolling ofround object as shown the velocity of centre of mass i

Discussion

3.	84. A short electric dipole is held at origin with its dipole moment along X-axis . If electric field intensity at a point (r,theta) in dipole field is 27V/m, the electric field intensity at a point (3r, theta) is??
Answer» 84. A short electric dipole is held at origin with its dipole moment along X-axis . If electric field intensity at a point (r,theta) in dipole field is 27V/m, the electric field intensity at a point (3r, theta) is??

Discussion

4.	The air density at Mount Everest is less than that at the sea level. It is found by mountaineers that for one trip lasting a few hours, the extra oxygen needed by them corresponds to 30,000 cc at sea level (pressure 1 atmosphere, temperature 27∘. Assuming that the temperature around Mount Everest is −73∘C and that the oxygen cylinder has capacity of 5.2 litre, the pressure at which O2 be filled (at site) in cylinder is
Answer» The air density at Mount Everest is less than that at the sea level. It is found by mountaineers that for one trip lasting a few hours, the extra oxygen needed by them corresponds to 30,000 cc at sea level (pressure 1 atmosphere, temperature $27^{\circ}$ . Assuming that the temperature around Mount Everest is $- 73^{\circ} C$ and that the oxygen cylinder has capacity of 5.2 litre, the pressure at which $O_{2}$ be filled (at site) in cylinder is

4.

The air density at Mount Everest is less than that at the sea level. It is found by mountaineers that for one trip lasting a few hours, the extra oxygen needed by them corresponds to 30,000 cc at sea level (pressure 1 atmosphere, temperature 27∘. Assuming that the temperature around Mount Everest is −73∘C and that the oxygen cylinder has capacity of 5.2 litre, the pressure at which O2 be filled (at site) in cylinder is

Answer»

The air density at Mount Everest is less than that at the sea level. It is found by mountaineers that for one trip lasting a few hours, the extra oxygen needed by them corresponds to 30,000 cc at sea level (pressure 1 atmosphere, temperature $27^{\circ}$ . Assuming that the temperature around Mount Everest is $- 73^{\circ} C$ and that the oxygen cylinder has capacity of 5.2 litre, the pressure at which $O_{2}$ be filled (at site) in cylinder is

Discussion

5.	A mercury drop of radius 1 cm is sprayed into 106 droplets of equal size. The energy expended in this process is -(surface tension of mercury is equal to 32×10−2 N/m)
Answer» A mercury drop of radius $1 cm$ is sprayed into $10^{6}$ droplets of equal size. The energy expended in this process is - (surface tension of mercury is equal to $32 \times 10^{- 2} N/m$ )

Discussion

6.	The velocity at the maximum height of a projectile is half its initial velocity of projection. Find its range on the horizontal plane. If u=20 ms−1. (Take g=10 m/s2)
Answer» The velocity at the maximum height of a projectile is half its initial velocity of projection. Find its range on the horizontal plane. If $u = 20 {ms}^{- 1}$ . (Take $g = 10 {m/s}^{2}$ )

Discussion

7.	Two balls A and B of masses 2 kg each are moving with speeds 1 m/s and 2 m/s on a frictionless surface. After colliding, ball A returns back with speed 0.5 m/s, then the maximum potential energy of deformation is
Answer» Two balls $A$ and $B$ of masses $2 kg$ each are moving with speeds $1 m/s$ and $2 m/s$ on a frictionless surface. After colliding, ball $A$ returns back with speed $0.5 m/s$ , then the maximum potential energy of deformation is

Discussion

8.	If x=at+bt2, where x is the distance travelled by the body in km and t is the time taken by it in s, then the unit of b will be
Answer» If $x = a t + b t^{2}$ , where $x$ is the distance travelled by the body in $km$ and $t$ is the time taken by it in $s$ , then the unit of $b$ will be

Discussion

9.	The orbital velocity of an artificial satellite in a circular orbit just above the earth's surface is v. For a satellite orbiting at an altitude of half the earth's radius, the orbital velocity is
Answer» The orbital velocity of an artificial satellite in a circular orbit just above the earth's surface is $v$ . For a satellite orbiting at an altitude of half the earth's radius, the orbital velocity is

Discussion

10.	For an ideal Rankine cycle operating between pressures of 30 bar and 0.04 bar, the work output from the turbine is 903kJ/kg and the work input to the feed pup is 3kJ/kg. The specific steam consumption is(round off to 2 decimal places).4
Answer» For an ideal Rankine cycle operating between pressures of $30$ bar and $0.04$ bar, the work output from the turbine is $903 k J / k g$ and the work input to the feed pup is $3 k J / k g$ . The specific steam consumption is (round off to $2$ decimal places). 4

Discussion

11.	A round uniform body of radius R, mass M, and moment of inertia I rolls down (without slipping) an inclined plane making an angle θ with the horizontal. Then its acceleration is
Answer» A round uniform body of radius R, mass M, and moment of inertia I rolls down (without slipping) an inclined plane making an angle $θ$ with the horizontal. Then its acceleration is

Discussion

12.	is pseudo for acts along motion?
Answer» is pseudo for acts along motion?

Discussion

13.	A horizontal solid cylinder (of mass m) is pivoted about its longitudinal axis. To the end of a thread wrapped on the cylinder a block (of mass 2m) is attached, as shown. If the system is left free, acceleration of the block (in ms−2) is(string is massless and there is no slipping anywhere)
Answer» A horizontal solid cylinder (of mass $m$ ) is pivoted about its longitudinal axis. To the end of a thread wrapped on the cylinder a block (of mass $2 m$ ) is attached, as shown. If the system is left free, acceleration of the block (in ${ms}^{- 2}$ ) is (string is massless and there is no slipping anywhere)

Discussion

14.	A ray of light incidents on a plane mirror at an angle of The deviationproduced in the ray is
Answer» A ray of light incidents on a plane mirror at an angle of The deviation produced in the ray is

14.

A ray of light incidents on a plane mirror at an angle of The deviationproduced in the ray is

Answer»

A ray of light incidents on a plane mirror at an angle of The deviation

produced in the ray is

Discussion

15.	Choose only incorrect statement from the following
Answer» Choose only incorrect statement from the following

Discussion

16.	Flux is a __ (Scalar/vector) quantity.
Answer» Flux is a __ (Scalar/vector) quantity.

Discussion

17.	A particle is projected upwards at an angle θ=45∘ with horizontal from the top of a tower 10 m high. Assume the origin is situated at the bottom of the tower and the speed at which the particle is projected is 40√2 m/s. Find the equation of trajectory of the particle.
Answer» A particle is projected upwards at an angle $θ = 45^{\circ}$ with horizontal from the top of a tower $10 m$ high. Assume the origin is situated at the bottom of the tower and the speed at which the particle is projected is $40 \sqrt{2} m/s$ . Find the equation of trajectory of the particle.

Discussion

18.	A bob of mass 0.1 kg hung from the ceiling of a room by a string 2 m long is set into oscillation. The speed of the bob at its mean position is 1 m s-1. What is the trajectory of the bob if the string is cut when the bob is (a) at one of its extreme positions, (b) at its mean position
Answer» A bob of mass 0.1 kg hung from the ceiling of a room by a string 2 m long is set into oscillation. The speed of the bob at its mean position is 1 m s-1. What is the trajectory of the bob if the string is cut when the bob is (a) at one of its extreme positions, (b) at its mean position

Discussion

19.	What is the correct sequence of strength of various groups in +I and-I category?
Answer» What is the correct sequence of strength of various groups in +I and-I category?

Discussion

20.	Equilibrium exists in market when quantity _____________ at the prevailing price.
Answer» Equilibrium exists in market when quantity _____________ at the prevailing price.

Discussion

21.	A particle moves through angular displacement θ on a circular path of radius ′r′. The linear displacement will be :
Answer» A particle moves through angular displacement $θ$ on a circular path of radius $^{'} r^{'}$ . The linear displacement will be :

Discussion

22.	A proton accelerated by a potential difference 500 kV flies through a uniform transverse magnetic field with induction B=0.51 T. The field occupies a region of space d=10 cm thickness as in figure. Find the angle (in degree) through which the proton deviates from the initial direction of motion.Take charge of proton as 1.6×10−19C and mass of the proton is 1.6×10−27kg
Answer» A proton accelerated by a potential difference $500 kV$ flies through a uniform transverse magnetic field with induction $B = 0.51 T$ . The field occupies a region of space $d = 10 cm$ thickness as in figure. Find the angle (in degree) through which the proton deviates from the initial direction of motion. Take charge of proton as $1.6 \times 10^{- 19} C$ and mass of the proton is $1.6 \times 10^{- 27} kg$

Discussion

23.	ntnttntttntttt ntttttAn elevator and its load have a total mass of 800 kg. Find the tension in the supporting cable when the elevator, moving downward at 10 m/s, is brought to rest with constant acceleration in a distance of 25 m. (Take g = 10 m/s2) :-ntttnttntnn ntnttntttnttttnttttt(1)nttttnttttt6400 Nntttntttnttttnttttt(2)nttttnttttt8000 Nntttntttnttttnttttt(3)nttttnttttt9600 Nntttntttnttttnttttt(4)nttttntttttZerontttnttntnn ntn
Answer» ntnttntttntttt ntttttAn elevator and its load have a total mass of 800 kg. Find the tension in the supporting cable when the elevator, moving downward at 10 m/s, is brought to rest with constant acceleration in a distance of 25 m. (Take g = 10 m/s2) :-ntttnttntnn ntnttntttnttttnttttt(1)nttttnttttt6400 Nntttntttnttttnttttt(2)nttttnttttt8000 Nntttntttnttttnttttt(3)nttttnttttt9600 Nntttntttnttttnttttt(4)nttttntttttZerontttnttntnn ntn

Discussion

24.	71. wire loop is rotated in magnetic field. The fequency of change of direction of the iduced current is? (1) Six times per revolution (2) Once per revolution (3) Twice per revolution (4) Four times per revolution
Answer» 71. wire loop is rotated in magnetic field. The fequency of change of direction of the iduced current is? (1) Six times per revolution (2) Once per revolution (3) Twice per revolution (4) Four times per revolution

Discussion

25.	A parallel beam of monochromatic light falls on a thin converging lens whose material has RI 1.5. The light emerges after two internal reflections one at each face of the lens. The focal length of the lens for this configuration is (Radius of curvature of each face is R)
Answer» A parallel beam of monochromatic light falls on a thin converging lens whose material has RI 1.5. The light emerges after two internal reflections one at each face of the lens. The focal length of the lens for this configuration is (Radius of curvature of each face is R)

Discussion

26.	140.The electric potentisal decrases uniformly from
Answer» 140.The electric potentisal decrases uniformly from

Discussion

27.	A rod of length l rotates with a uniform angularvelocity ) about an axis passing through its middlepoint but normal to its length in a uniform magneticfield of induction B with its direction parallel to theaxis of rotation. The induced emf between the twoends of the rod is49BroBl2( a)(b) zeroBlz(1)(d)2B120)
Answer» A rod of length l rotates with a uniform angularvelocity ) about an axis passing through its middlepoint but normal to its length in a uniform magneticfield of induction B with its direction parallel to theaxis of rotation. The induced emf between the twoends of the rod is49BroBl2( a)(b) zeroBlz(1)(d)2B120)

Discussion

28.	A ladder rests against a frictionless vertical wall,with its upper end 6m above the ground and the lower end 4m awayfrom the wall.The weight of the ladder is 500N and its C.G. at 1/3rd dis†an ce from the lower end.What will be the wall's reaction in newton?
Answer» A ladder rests against a frictionless vertical wall,with its upper end 6m above the ground and the lower end 4m awayfrom the wall.The weight of the ladder is 500N and its C.G. at 1/3rd dis†an ce from the lower end.What will be the wall's reaction in newton?

Discussion

29.	28. A particle of mass m oscillates along the horizontal diameter AB inside a smooth spherical she'll of radius R. At any instant kinetic energy is K. Then force applied by particle on the shell at that instant
Answer» 28. A particle of mass m oscillates along the horizontal diameter AB inside a smooth spherical she'll of radius R. At any instant kinetic energy is K. Then force applied by particle on the shell at that instant

Discussion

30.	What is the speed of mass 100 g having kinetic energy of 20 J?
Answer» What is the speed of mass $100 g$ having kinetic energy of $20 J$ ?

Discussion

31.	If a ball strikes with a velocity u1 with a wall which itself is approaching it with a velocity u2. Then which of the given options are correct?
Answer» If a ball strikes with a velocity $u_{1}$ with a wall which itself is approaching it with a velocity $u_{2}$ . Then which of the given options are correct?

31.

If a ball strikes with a velocity u1 with a wall which itself is approaching it with a velocity u2. Then which of the given options are correct?

Answer»

If a ball strikes with a velocity $u_{1}$ with a wall which itself is approaching it with a velocity $u_{2}$ . Then

which of the given options are correct?

Discussion

32.	In the figure shown, if the velocity of end A is v0, find the velocity of the end B of the rigid rod at the given instant.
Answer» In the figure shown, if the velocity of end A is $v_{0}$ , find the velocity of the end $B$ of the rigid rod at the given instant.

Discussion

33.	Calculate the charge on the capacitor long time after the assemblingof the circuit
Answer» Calculate the charge on the capacitor long time after the assembling of the circuit

33.

Calculate the charge on the capacitor long time after the assemblingof the circuit

Answer»

Calculate the charge on the capacitor long time after the assembling
of the circuit

Discussion

34.	Find the position of image ?
Answer» Find the position of image ?

Discussion

35.	A short bar magnet of moment 4 Am2 is placed in the magnetic meridian with its south-pole pointing geographic north. The distance between two null points is found to be 20 cm. (iii)If the same magnet is placed with its north pole pointing geographic north, then the distance between the null points (use 413=1.59).
Answer» A short bar magnet of moment $4 {Am}^{2}$ is placed in the magnetic meridian with its south-pole pointing geographic north. The distance between two null points is found to be $20 cm$ . $(i i i)$ If the same magnet is placed with its north pole pointing geographic north, then the distance between the null points $(use 4^{\frac{1}{3}} = 1.59)$ .

Discussion

36.	39. If a particle is moving along a straight line and itsvelocity varies with time as v 2t -2 (v and t arein St units) then choose the incorrect option.(1) Average velocity from t0 toism/s12(2) Acceleration is zero at t 1s(3) Acceleration is 2 m/s? at t o(4) Average speed from t0 to t 2 s is mis4
Answer» 39. If a particle is moving along a straight line and itsvelocity varies with time as v 2t -2 (v and t arein St units) then choose the incorrect option.(1) Average velocity from t0 toism/s12(2) Acceleration is zero at t 1s(3) Acceleration is 2 m/s? at t o(4) Average speed from t0 to t 2 s is mis4

Discussion

37.	In a purely resistive AC circuit, which of the following graphs, best represents the variation of the magnitude of peak current (Io) with the angular frequency (ω) of the AC supply?
Answer» In a purely resistive AC circuit, which of the following graphs, best represents the variation of the magnitude of peak current $(I_{o})$ with the angular frequency $(ω)$ of the AC supply?

Discussion

38.	Derivative of f(x)=4√x+1√x is
Answer» Derivative of $f (x) = 4 \sqrt{x} + \frac{1}{\sqrt{x}}$ is

Discussion

39.	The wavelength of the third line of the Balmer series for a hydrogen atom is -
Answer» The wavelength of the third line of the Balmer series for a hydrogen atom is -

Discussion

40.	An ideal gas undergoes a process in which PV−a = constant, where V is the volume occupied by the gas initially at pressure P. At the end of the process, rms speed of gas molecules has become a12 times of its initial value. The value of CV so that energy transferred by the heat to the gas becomes 'a' times of the initial energy isR((1+a)a−1−naa2−1]. The value of n is
Answer» An ideal gas undergoes a process in which $P V^{- a}$ = constant, where $V$ is the volume occupied by the gas initially at pressure $P$ . At the end of the process, rms speed of gas molecules has become $a^{\frac{1}{2}}$ times of its initial value. The value of $C_{V}$ so that energy transferred by the heat to the gas becomes ' $a$ ' times of the initial energy is $R (\frac{(1 + a)}{a - 1} - \frac{n a}{a^{2} - 1}]$ . The value of $n$ is

Discussion

41.	how [Ni(CN)4]2- is diamagnetic ??explain with CFSE theory
Answer» how [Ni(CN)4]2- is diamagnetic ??explain with CFSE theory

Discussion

42.	Three particles of masses 300 g, 800 g and 700 g are placed at positions A(2,4),B(3,5) and C(−3,−1) respectively. What is the moment of inertia of the system about the origin?
Answer» Three particles of masses $300 g, 800 g$ and $700 g$ are placed at positions $A (2, 4), B (3, 5)$ and $C (- 3, - 1)$ respectively. What is the moment of inertia of the system about the origin?

Discussion

43.	57.If two particles are projected simultaneously with different speeds from same point with different angles of projection, then correct statements is that their relative 1) Acceleration is zero 2) Velocity along horizontal direction is constant 3) Velocity is constant 4) All of these
Answer» 57.If two particles are projected simultaneously with different speeds from same point with different angles of projection, then correct statements is that their relative 1) Acceleration is zero 2) Velocity along horizontal direction is constant 3) Velocity is constant 4) All of these

Discussion

44.	The figure shows elliptical orbit of a planet m about the sun S. The shaded area SCD is twice the shaded area SAB. If t1 is the time for the planet to move from C to D and t2 is the time to move from A to B, then
Answer» The figure shows elliptical orbit of a planet $m$ about the sun $S$ . The shaded area $SCD$ is twice the shaded area $SAB$ . If $t_{1}$ is the time for the planet to move from $C$ to $D$ and $t_{2}$ is the time to move from $A$ to $B$ , then

Discussion

45.	A ring is made of a wire having a resistance R0=12 Ω. Find the points A and B as shown in the figure, at which a current carrying conductor should be connected so that the resistance R of the sub-circuit between these points is equal to 83 Ω.
Answer» A ring is made of a wire having a resistance $R_{0} = 12 Ω$ . Find the points $A$ and $B$ as shown in the figure, at which a current carrying conductor should be connected so that the resistance $R$ of the sub-circuit between these points is equal to $\frac{8}{3} Ω$ .

Discussion

46.	You are walking along a seashore and a mild wind is blowing. Is the motion of air a wave motion?
Answer» You are walking along a seashore and a mild wind is blowing. Is the motion of air a wave motion?

Discussion

47.	65. A bullet of mass 10g leaves a riffle at an initial velocity of 1000m/s and strike the earth at the same level with a velocity of 500m/s.the work done in joules overcoming the resistance of air will be?
Answer» 65. A bullet of mass 10g leaves a riffle at an initial velocity of 1000m/s and strike the earth at the same level with a velocity of 500m/s.the work done in joules overcoming the resistance of air will be?

Discussion

48.	A hypothetical planet has density ρ, radius R, and surface gravitational acceleration g. If the radius of the planet is doubled, but the planetary density stayed the same, the acceleration due to gravity at the planet’s surface would be
Answer» A hypothetical planet has density $ρ$ , radius R, and surface gravitational acceleration g. If the radius of the planet is doubled, but the planetary density stayed the same, the acceleration due to gravity at the planet’s surface would be

Discussion

49.	What minimum angular velocity should be given to the rod to complete the circle ?
Answer» What minimum angular velocity should be given to the rod to complete the circle ?

Discussion

50.	3. A ball of mass m hits a floor with a speed Vmaking an angle a with the normal N. Thecoefficient of restitution is e. The angle made byreflected ball with floor isN02ITTTTTITIT(2) tan 1(ecoto(1) cot" (ecot atan c(3) tan(4) Cottanonxis variesS 2
Answer» 3. A ball of mass m hits a floor with a speed Vmaking an angle a with the normal N. Thecoefficient of restitution is e. The angle made byreflected ball with floor isN02ITTTTTITIT(2) tan 1(ecoto(1) cot" (ecot atan c(3) tan(4) Cottanonxis variesS 2

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A point charge +q is placed on the axis of a ring of radius R at distance r from the centre ,then electric flux through the ring due to the point charge will be

for pure rolling ofround object as shown the velocity of centre of mass i

84. A short electric dipole is held at origin with its dipole moment along X-axis . If electric field intensity at a point (r,theta) in dipole field is 27V/m, the electric field intensity at a point (3r, theta) is??

A mercury drop of radius 1 cm is sprayed into 106 droplets of equal size. The energy expended in this process is -(surface tension of mercury is equal to 32×10−2 N/m)

The velocity at the maximum height of a projectile is half its initial velocity of projection. Find its range on the horizontal plane. If u=20 ms−1. (Take g=10 m/s2)

Two balls A and B of masses 2 kg each are moving with speeds 1 m/s and 2 m/s on a frictionless surface. After colliding, ball A returns back with speed 0.5 m/s, then the maximum potential energy of deformation is

If x=at+bt2, where x is the distance travelled by the body in km and t is the time taken by it in s, then the unit of b will be

The orbital velocity of an artificial satellite in a circular orbit just above the earth's surface is v. For a satellite orbiting at an altitude of half the earth's radius, the orbital velocity is

For an ideal Rankine cycle operating between pressures of 30 bar and 0.04 bar, the work output from the turbine is 903kJ/kg and the work input to the feed pup is 3kJ/kg. The specific steam consumption is(round off to 2 decimal places).4

A round uniform body of radius R, mass M, and moment of inertia I rolls down (without slipping) an inclined plane making an angle θ with the horizontal. Then its acceleration is

is pseudo for acts along motion?

A horizontal solid cylinder (of mass m) is pivoted about its longitudinal axis. To the end of a thread wrapped on the cylinder a block (of mass 2m) is attached, as shown. If the system is left free, acceleration of the block (in ms−2) is(string is massless and there is no slipping anywhere)

A ray of light incidents on a plane mirror at an angle of The deviationproduced in the ray is

Choose only incorrect statement from the following

Flux is a __ (Scalar/vector) quantity.

A particle is projected upwards at an angle θ=45∘ with horizontal from the top of a tower 10 m high. Assume the origin is situated at the bottom of the tower and the speed at which the particle is projected is 40√2 m/s. Find the equation of trajectory of the particle.

A bob of mass 0.1 kg hung from the ceiling of a room by a string 2 m long is set into oscillation. The speed of the bob at its mean position is 1 m s-1. What is the trajectory of the bob if the string is cut when the bob is (a) at one of its extreme positions, (b) at its mean position

What is the correct sequence of strength of various groups in +I and-I category?

Equilibrium exists in market when quantity _____________ at the prevailing price.

A particle moves through angular displacement θ on a circular path of radius ′r′. The linear displacement will be :

71. wire loop is rotated in magnetic field. The fequency of change of direction of the iduced current is? (1) Six times per revolution (2) Once per revolution (3) Twice per revolution (4) Four times per revolution

A parallel beam of monochromatic light falls on a thin converging lens whose material has RI 1.5. The light emerges after two internal reflections one at each face of the lens. The focal length of the lens for this configuration is (Radius of curvature of each face is R)

140.The electric potentisal decrases uniformly from

A ladder rests against a frictionless vertical wall,with its upper end 6m above the ground and the lower end 4m awayfrom the wall.The weight of the ladder is 500N and its C.G. at 1/3rd dis†an ce from the lower end.What will be the wall's reaction in newton?

28. A particle of mass m oscillates along the horizontal diameter AB inside a smooth spherical she'll of radius R. At any instant kinetic energy is K. Then force applied by particle on the shell at that instant

What is the speed of mass 100 g having kinetic energy of 20 J?

If a ball strikes with a velocity u1 with a wall which itself is approaching it with a velocity u2. Then which of the given options are correct?

In the figure shown, if the velocity of end A is v0, find the velocity of the end B of the rigid rod at the given instant.

Calculate the charge on the capacitor long time after the assemblingof the circuit

Find the position of image ?

39. If a particle is moving along a straight line and itsvelocity varies with time as v 2t -2 (v and t arein St units) then choose the incorrect option.(1) Average velocity from t0 toism/s12(2) Acceleration is zero at t 1s(3) Acceleration is 2 m/s? at t o(4) Average speed from t0 to t 2 s is mis4

In a purely resistive AC circuit, which of the following graphs, best represents the variation of the magnitude of peak current (Io) with the angular frequency (ω) of the AC supply?

Derivative of f(x)=4√x+1√x is

The wavelength of the third line of the Balmer series for a hydrogen atom is -

how [Ni(CN)4]2- is diamagnetic ??explain with CFSE theory

Three particles of masses 300 g, 800 g and 700 g are placed at positions A(2,4),B(3,5) and C(−3,−1) respectively. What is the moment of inertia of the system about the origin?

57.If two particles are projected simultaneously with different speeds from same point with different angles of projection, then correct statements is that their relative 1) Acceleration is zero 2) Velocity along horizontal direction is constant 3) Velocity is constant 4) All of these

The figure shows elliptical orbit of a planet m about the sun S. The shaded area SCD is twice the shaded area SAB. If t1 is the time for the planet to move from C to D and t2 is the time to move from A to B, then

A ring is made of a wire having a resistance R0=12 Ω. Find the points A and B as shown in the figure, at which a current carrying conductor should be connected so that the resistance R of the sub-circuit between these points is equal to 83 Ω.

You are walking along a seashore and a mild wind is blowing. Is the motion of air a wave motion?

65. A bullet of mass 10g leaves a riffle at an initial velocity of 1000m/s and strike the earth at the same level with a velocity of 500m/s.the work done in joules overcoming the resistance of air will be?

A hypothetical planet has density ρ, radius R, and surface gravitational acceleration g. If the radius of the planet is doubled, but the planetary density stayed the same, the acceleration due to gravity at the planet’s surface would be

What minimum angular velocity should be given to the rod to complete the circle ?

3. A ball of mass m hits a floor with a speed Vmaking an angle a with the normal N. Thecoefficient of restitution is e. The angle made byreflected ball with floor isN02ITTTTTITIT(2) tan 1(ecoto(1) cot" (ecot atan c(3) tan(4) Cottanonxis variesS 2