50278 + Interview Questions in Physics

1.	A 2 MeV proton is moving perpendicular to a uniform magnetic field of 2.5 T. The magnetic force on the proton is-[Take mass of the proton, m=1.6×10−27 kg]
Answer» A $2 MeV$ proton is moving perpendicular to a uniform magnetic field of $2.5 T .$ The magnetic force on the proton is- [Take mass of the proton, $m = 1.6 \times 10^{- 27} kg$ ]

Discussion

2.	Why does the lower part of each box of a ferris wheel moves in the outer direction when the wheel rotates. If this is because of centripetal force,then why doesn't the centripetal force is equalised with centrifugal force.
Answer» Why does the lower part of each box of a ferris wheel moves in the outer direction when the wheel rotates. If this is because of centripetal force,then why doesn't the centripetal force is equalised with centrifugal force.

Discussion

3.	A U-tube manometer of tube diameter D is filled with a liquid of zero viscosity. If the volume of the liquid filled is V, the natural frequency of oscillations in the liquid level about its mean position, due to small perturbations, is
Answer» A U-tube manometer of tube diameter D is filled with a liquid of zero viscosity. If the volume of the liquid filled is V, the natural frequency of oscillations in the liquid level about its mean position, due to small perturbations, is

Discussion

4.	an electric dipole in x-y plane has dipole moment p which makes an angle θ with respect to positive x-axis. whe sujectd to an eletric feild E1=E icap it experiences torqe ζ1=a kcap. when subjected to another electric feild E2=1/root3 E1 jcap it experiences a torqueζ2=-ζ1. the potential energy associated with dipole when subjected to electric feild E1=Eicap will be
Answer» an electric dipole in x-y plane has dipole moment p which makes an angle θ with respect to positive x-axis. whe sujectd to an eletric feild E1=E icap it experiences torqe ζ1=a kcap. when subjected to another electric feild E2=1/root3 E1 jcap it experiences a torqueζ2=-ζ1. the potential energy associated with dipole when subjected to electric feild E1=Eicap will be

Discussion

5.	A boat is moving due east in a region where the earth's magnetic field is 5.0×10−5 NA−1m−1 due north and horizontal. The boat carries a vertical aerial 2 m long. If the speed of the boat is 1.50 ms−1, the magnitude of the induced emf in the wire of aerial is. (in mV)
Answer» A boat is moving due east in a region where the earth's magnetic field is $5.0 \times 10^{- 5} {NA}^{- 1} m^{- 1}$ due north and horizontal. The boat carries a vertical aerial $2 m$ long. If the speed of the boat is $1.50 {ms}^{- 1}$ , the magnitude of the induced $e m f$ in the wire of aerial is. (in $mV$ )

Discussion

6.	A boy is sitting on a swing and blowing a whistle at a frequency of 1000 Hz. The swing is moving through an angle of 30∘ from vertical. The boy is at 2 m from the point of support of the swing and a girl stands in front of the swing. Then the maximum frequency heard by the girl is: (Given: velocity of sound in air = 330 m/s)[Neglect, velocity of wind and take g=10 m/s2]
Answer» A boy is sitting on a swing and blowing a whistle at a frequency of $1000 Hz$ . The swing is moving through an angle of $30^{\circ}$ from vertical. The boy is at $2 m$ from the point of support of the swing and a girl stands in front of the swing. Then the maximum frequency heard by the girl is: (Given: velocity of sound in air = $330 m/s$ ) [Neglect, velocity of wind and take $g = 10 {m/s}^{2}$ ]

Discussion

7.	The g value on the two planets are 9.6 m/s2 and 3.2 m/s2 and their radii are 7200 km and 2400 km respectively. The ratio of escape velocities on two planets Ve1Ve2=x. Find the value of x.
Answer» The $g$ value on the two planets are $9.6 {m/s}^{2}$ and $3.2 {m/s}^{2}$ and their radii are $7200 km$ and $2400 km$ respectively. The ratio of escape velocities on two planets $\frac{V_{e 1}}{V_{e 2}} = x$ . Find the value of $x$ .

Discussion

8.	Find the realation between the velocity of block A and velocity of block B in the shown figure.
Answer» Find the realation between the velocity of block $A$ and velocity of block $B$ in the shown figure.

Discussion

9.	What is the angle between the electric field vectors at points A and B because of an infinitely long line charge as shown?
Answer» What is the angle between the electric field vectors at points A and B because of an infinitely long line charge as shown?

9.

What is the angle between the electric field vectors at points A and B because of an infinitely long line charge as shown?

Answer»

What is the angle between the electric field vectors at points A and B because of an infinitely long line charge as shown?

Discussion

10.	The system shown is in equilibrium. Find the accelerations of the blocks A, B and C just after the spring between B and C is cut. All blocks are of equal masses ‘m′ each and springs are of equal stiffness. (Assume springs to be ideal and take downward acceleration to be positive).
Answer» The system shown is in equilibrium. Find the accelerations of the blocks A, B and C just after the spring between B and C is cut. All blocks are of equal masses $‘ m^{'}$ each and springs are of equal stiffness. (Assume springs to be ideal and take downward acceleration to be positive).

Discussion

11.	the velocity (v) of a particle moving in along x axis varies with its position x as shown in figure . the accleration (a) of particle varies with position (x)as (1) a^2= x+3 (2) a= 2x^2 +4 (3) 2a= 3x+ 5(4) a= 4x-8
Answer» the velocity (v) of a particle moving in along x axis varies with its position x as shown in figure . the accleration (a) of particle varies with position (x)as (1) a^2= x+3 (2) a= 2x^2 +4 (3) 2a= 3x+ 5 (4) a= 4x-8

Discussion

12.	A data is transmitted through a voice-grade telephone channel of bandwidth 3.4 kHz. All 12 samples stored in the terminal are equiprobable and independent. The channel output signal to noise ratio is 15 dB. The channel capacity. C and maximum symbol rate, fs for error free transmission is :
Answer» A data is transmitted through a voice-grade telephone channel of bandwidth 3.4 kHz. All 12 samples stored in the terminal are equiprobable and independent. The channel output signal to noise ratio is 15 dB. The channel capacity. C and maximum symbol rate, $f_{s}$ for error free transmission is :

Discussion

13.	Find the distance between object (O) and final image formed after two successive reflections. Take the first reflection on mirror M1 having radius of curvature 20 cm
Answer» Find the distance between object $(O)$ and final image formed after two successive reflections. Take the first reflection on mirror $M_{1}$ having radius of curvature $20 cm$

Discussion

14.	A body is thrown with a velocity of 20 ms−1 from a building of height 15 m. If the angle of projection is 30∘ above the horizontal, the time of flight and the range of the projectile are respectively. (Take g=10 m/s2)
Answer» A body is thrown with a velocity of $20 m s^{- 1}$ from a building of height $15 m$ . If the angle of projection is $30^{\circ}$ above the horizontal, the time of flight and the range of the projectile are respectively. (Take $g = 10 m / s^{2}$ )

Discussion

15.	Let [ϵ0] denote the dimensional formula of the permittivity of vacuum. If M= mass, L= length, T= time and A= electric current, then:
Answer» Let $[ϵ_{0}]$ denote the dimensional formula of the permittivity of vacuum. If $M =$ mass, $L =$ length, $T =$ time and $A =$ electric current, then:

Discussion

16.	A dielectric slab of dielectric constant K=12 is inserted between two conducting plates having opposite charge densities of same magnitude on them. Find the magnitude of ratio of charge density induced on the surface of dielectric slab facing the conducting plate and the charge density on electric plate.
Answer» A dielectric slab of dielectric constant $K = 12$ is inserted between two conducting plates having opposite charge densities of same magnitude on them. Find the magnitude of ratio of charge density induced on the surface of dielectric slab facing the conducting plate and the charge density on electric plate.

Discussion

17.	puelengthlength(4) None of theseThe power of a pump which can pump 200 kgof water to a height of 200 m in 10 s is-Q.17(g= 10 m/s2)\lbrack EAMCET MED-98\rbrack(1) 40 KW(2) 80 KW(3) 4000 KW(4) 960 KW
Answer» puelengthlength(4) None of theseThe power of a pump which can pump 200 kgof water to a height of 200 m in 10 s is-Q.17(g= 10 m/s2)\lbrack EAMCET MED-98\rbrack(1) 40 KW(2) 80 KW(3) 4000 KW(4) 960 KW

Discussion

18.	Six point charges are placed on the vertices of regular hexagon of side 1 m as shown in the figure. The net electric field at the centre of hexagon isthe charges are +q,-q,-q,+q,+q,-q respectively.
Answer» Six point charges are placed on the vertices of regular hexagon of side 1 m as shown in the figure. The net electric field at the centre of hexagon is the charges are +q,-q,-q,+q,+q,-q respectively.

Discussion

19.	A swimmer's speed in the direction of the flow of river is 16 km/h. Against the direction of flow of river, the swimmer's speed is 8 km/h. Calculate the swimmer's speed in still water and speed of flow of the river respectively.
Answer» A swimmer's speed in the direction of the flow of river is $16 km/h$ . Against the direction of flow of river, the swimmer's speed is $8 km/h$ . Calculate the swimmer's speed in still water and speed of flow of the river respectively.

Discussion

20.	A 900 kg car moving at 10 m/s takes a turn around a circular path of radius 25 m. The centripetal acceleration and the centripetal force acting on the car is given by (Neglect friction between all surfaces)
Answer» A $900 k g$ car moving at $10 m / s$ takes a turn around a circular path of radius $25 m$ . The centripetal acceleration and the centripetal force acting on the car is given by (Neglect friction between all surfaces)

Discussion

21.	Two metal cubes with 3 cm edges of copper and aluminium are arranged as shown in the figure. The total thermal current from one reservoir to the other will be(Thermal conductivity, KCu=385 W/m-K, KAl=209 W/m-K)
Answer» Two metal cubes with $3 cm$ edges of copper and aluminium are arranged as shown in the figure. The total thermal current from one reservoir to the other will be $(Thermal conductivity, K_{C u} = 385 W/m-K, K_{A l} = 209 W/m-K)$

Discussion

22.	A stone of mass 0.05 kg is thrown vertically upwards. What is the direction and magnitude of net force on the stone during its upward motion?
Answer» A stone of mass 0.05 kg is thrown vertically upwards. What is the direction and magnitude of net force on the stone during its upward motion?

Discussion

23.	In a Young's double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths λ1=12000 ˚A and λ2=10000 ˚A. At what minimum distance from the common central bright fringe on the screen, 2 m from the slit, will a bright fringe from one interference pattern coincide, with a bright fringe from the other?
Answer» In a Young's double slit experiment, the slits are $2 mm$ apart and are illuminated by photons of two wavelengths $λ_{1} = 12000 ˚ A$ and $λ_{2} = 10000 ˚ A$ . At what minimum distance from the common central bright fringe on the screen, $2 m$ from the slit, will a bright fringe from one interference pattern coincide, with a bright fringe from the other?

Discussion

24.	Two exactly similar wires are stretched by the same load and difference in their elongation is 2.5×10∧(-3). If thier elasticities are in the ratio 5:3,find their individual elongations
Answer» Two exactly similar wires are stretched by the same load and difference in their elongation is 2.5×10∧(-3). If thier elasticities are in the ratio 5:3,find their individual elongations

Discussion

25.	Find the greatest length of steel wire that can hang vertically without breaking. Breaking stress of steel is σm and the density of wire is ρ.
Answer» Find the greatest length of steel wire that can hang vertically without breaking. Breaking stress of steel is $σ_{m}$ and the density of wire is $ρ$ .

Discussion

26.	An electric dipole if moment p is placed normal to the lines of force of electric intensity E ,then the work done in rotating it through an angle of 180,is? In this question,which initial angle should be taken ? I am facing problem in application type question ,where I am in dilemma to take which as initial angle
Answer» An electric dipole if moment p is placed normal to the lines of force of electric intensity E ,then the work done in rotating it through an angle of 180,is? In this question,which initial angle should be taken ? I am facing problem in application type question ,where I am in dilemma to take which as initial angle

Discussion

27.	A radioactive nucleus of mass number 'A', initially at rest, emits an α - particle with a speed 'v'. What will be the recoil speed of the daughter nucleus?
Answer» A radioactive nucleus of mass number 'A', initially at rest, emits an $α$ - particle with a speed 'v'. What will be the recoil speed of the daughter nucleus?

Discussion

28.	Choose the correct option based on the prallelogram ABCD.
Answer» Choose the correct option based on the prallelogram $A B C D$ .

Discussion

29.	38. A charged particle is projected in a magnetic field . If the acceleration of charged particle in this field is found to be , then value of x 1. 2/3 2. 4/3 3. 1/3 4. 3
Answer» 38. A charged particle is projected in a magnetic field . If the acceleration of charged particle in this field is found to be , then value of x 1. 2/3 2. 4/3 3. 1/3 4. 3

Discussion

30.	A moving-coil galvanometer has 100 turns and each turn has an area 2.0 cm2. The magnetic field produced by the magnet is 0.01 T. The deflection in the coil is 0.05 radian when a current of 10 mA is passed through it. Find the torsional constant of the suspension wire.
Answer» A moving-coil galvanometer has $100 turns$ and each turn has an area $2.0 {cm}^{2}$ . The magnetic field produced by the magnet is $0.01 T$ . The deflection in the coil is $0.05 radian$ when a current of $10 mA$ is passed through it. Find the torsional constant of the suspension wire.

Discussion

31.	A person wishes to hit target from a tower of height 32 m by throwing a projectile at 10 m/s aiming directly to it as shown in figure. How short from target will the projectile fall? (g=10 m/s2)Write until two digits after the decimal point.
Answer» A person wishes to hit target from a tower of height 32 m by throwing a projectile at 10 m/s aiming directly to it as shown in figure. How short from target will the projectile fall? ( $g = 10 m / s^{2}$ )Write until two digits after the decimal point.

Discussion

32.	Two balls of masses 2 kg and 4 kg are moved towards each other with velocities 4 m/s and 2 m/s respectively on a frictionless surface. Find the impulse of maximum deformation for the ball of 4 kg mass.
Answer» Two balls of masses $2 kg$ and $4 kg$ are moved towards each other with velocities $4 m/s$ and $2 m/s$ respectively on a frictionless surface. Find the impulse of maximum deformation for the ball of $4 kg$ mass.

Discussion

33.	why Fe has less radius than Na
Answer» why Fe has less radius than Na

Discussion

34.	Consider a boat which moves with a velocity of v_{bw}=6km/h relative to water. At Time t=0, the boat passes through a piece of cork floating in water while moving dowstream. It turns back at time t=20min and meet the cork again at t=t_1. The dis†an ce travelled by cork between time interval t=0 and t=t_1
Answer» Consider a boat which moves with a velocity of v_{bw}=6km/h relative to water. At Time t=0, the boat passes through a piece of cork floating in water while moving dowstream. It turns back at time t=20min and meet the cork again at t=t_1. The dis†an ce travelled by cork between time interval t=0 and t=t_1

Discussion

35.	The systen shown in the figure remains stable when
Answer» The systen shown in the figure remains stable when

Discussion

36.	In a region, the potential is represented by V(x,y,z)=6x−8xy−8y+6yz, where V is in Volts and x,y,z are in meters. The electric force experienced by a charge of 2 coulombs situated at the point (1,1,1) is:-
Answer» In a region, the potential is represented by $V (x, y, z) = 6 x - 8 x y - 8 y + 6 y z$ , where $V$ is in $Volts$ and $x, y, z$ are in $meters$ . The electric force experienced by a charge of $2 coulombs$ situated at the point $(1, 1, 1)$ is:-

Discussion

37.	Why like charges repel and opposite charges attract descibe in detail with basic concepts
Answer» Why like charges repel and opposite charges attract descibe in detail with basic concepts

Discussion

38.	When 100 volts dc is applied across a solenoid a current of 1ampere flows in it. When 100 volts ac is applied across the same coil,the current drops to 0.5 ampere. If frequency of the ac source is 50Hz, what are the impedence and inductance of solenoid?
Answer» When 100 volts dc is applied across a solenoid a current of 1ampere flows in it. When 100 volts ac is applied across the same coil,the current drops to 0.5 ampere. If frequency of the ac source is 50Hz, what are the impedence and inductance of solenoid?

Discussion

39.	When a satellite in a circular orbit around the earth enters the atmospheric region, it encounters small air resistance to its motion. Then -
Answer» When a satellite in a circular orbit around the earth enters the atmospheric region, it encounters small air resistance to its motion. Then -

Discussion

40.	A charge Q is placed at the centre of a square. If electric field intensity die to the charge at the corners of the square is E1 , and the intensity at the mid point of the side of the square is E2 then find E1/E2
Answer» A charge Q is placed at the centre of a square. If electric field intensity die to the charge at the corners of the square is E1 , and the intensity at the mid point of the side of the square is E2 then find E1/E2

Discussion

41.	Find the incorrect option for the general rotation of a wheel of radius r which can be viewed as pure translation with velocity →V0 and pure rotation about O with →ω.
Answer» Find the incorrect option for the general rotation of a wheel of radius $r$ which can be viewed as pure translation with velocity $_{0}$ and pure rotation about $O$ with $\to ω$ .

Discussion

42.	what is carnot engine.draw gh graph for this.write its working and constructio
Answer» what is carnot engine.draw gh graph for this.write its working and constructio

Discussion

43.	If the energy of the radiations is enough then can the photoelectron emitted travel at the speed of light ( or even more )In that case will the electron gain mass?
Answer» If the energy of the radiations is enough then can the photoelectron emitted travel at the speed of light ( or even more ) In that case will the electron gain mass?

Discussion

44.	The ammeter shown in figure consists of a 480 Ω coil connected in parallel to a 20 Ω shunt. Find the reading of the ammeter.
Answer» The ammeter shown in figure consists of a $480 Ω$ coil connected in parallel to a $20 Ω$ shunt. Find the reading of the ammeter.

Discussion

45.	The coefficient of static friction between a wooden block of mass 0.5 kg and a vertical rough wall is 0.2. The minimum magnitude of horizontal force that should be applied on the block to keep it adhere to the wall will be ______ N. [g=10 ms−2]
Answer» The coefficient of static friction between a wooden block of mass $0.5 kg$ and a vertical rough wall is $0.2$ . The minimum magnitude of horizontal force that should be applied on the block to keep it adhere to the wall will be ______ $N$ . $[g = 10 {ms}^{- 2}]$

Discussion

46.	Why potential decrease in the direction of electric field?
Answer» Why potential decrease in the direction of electric field?

Discussion

47.	A particle is moving along a straight line has a velocity v m/s when it cleared a distance y metre. These two are connected by the relation v =49+y.When its velocity is 1 m/s,its acceleration is
Answer» A particle is moving along a straight line has a velocity v m/s when it cleared a distance y metre. These two are connected by the relation v =49+y.When its velocity is 1 m/s,its acceleration is

Discussion

48.	In a diffraction pattern for a small pin hole, if the size of hole is increased(1) Size of central bright increases(2) Intensity increases(3) Intensity decreases(4) Size of central bright remains same.
Answer» In a diffraction pattern for a small pin hole, if the size of hole is increased (1) Size of central bright increases (2) Intensity increases (3) Intensity decreases (4) Size of central bright remains same.

Discussion

49.	For two conducting concentric spherical shells of radius R1 and R2 respectively with charges Q1 and Q2 respectively find the a)the potential at the common centre b)potential difference between the two spherical shells
Answer» For two conducting concentric spherical shells of radius R1 and R2 respectively with charges Q1 and Q2 respectively find the a)the potential at the common centre b)potential difference between the two spherical shells

Discussion

50.	The mass of a hydrogen molecule is 3.32×10−27 kg. 1023 hydrogen molecules strike per second on a fixed wall of area 2 cm2 at an angle of 45∘ to the normal. They rebound elastically with a speed of 103 m/s, then the pressure on the wall is nearly,
Answer» The mass of a hydrogen molecule is $3.32 \times 10^{- 27} kg .$ $10^{23}$ hydrogen molecules strike per second on a fixed wall of area $2 {cm}^{2}$ at an angle of $45^{\circ}$ to the normal. They rebound elastically with a speed of $10^{3} m/s$ , then the pressure on the wall is nearly,

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A 2 MeV proton is moving perpendicular to a uniform magnetic field of 2.5 T. The magnetic force on the proton is-[Take mass of the proton, m=1.6×10−27 kg]

Why does the lower part of each box of a ferris wheel moves in the outer direction when the wheel rotates. If this is because of centripetal force,then why doesn't the centripetal force is equalised with centrifugal force.

A U-tube manometer of tube diameter D is filled with a liquid of zero viscosity. If the volume of the liquid filled is V, the natural frequency of oscillations in the liquid level about its mean position, due to small perturbations, is

A boat is moving due east in a region where the earth's magnetic field is 5.0×10−5 NA−1m−1 due north and horizontal. The boat carries a vertical aerial 2 m long. If the speed of the boat is 1.50 ms−1, the magnitude of the induced emf in the wire of aerial is. (in mV)

The g value on the two planets are 9.6 m/s2 and 3.2 m/s2 and their radii are 7200 km and 2400 km respectively. The ratio of escape velocities on two planets Ve1Ve2=x. Find the value of x.

Find the realation between the velocity of block A and velocity of block B in the shown figure.

What is the angle between the electric field vectors at points A and B because of an infinitely long line charge as shown?

The system shown is in equilibrium. Find the accelerations of the blocks A, B and C just after the spring between B and C is cut. All blocks are of equal masses ‘m′ each and springs are of equal stiffness. (Assume springs to be ideal and take downward acceleration to be positive).

the velocity (v) of a particle moving in along x axis varies with its position x as shown in figure . the accleration (a) of particle varies with position (x)as (1) a^2= x+3 (2) a= 2x^2 +4 (3) 2a= 3x+ 5(4) a= 4x-8

A data is transmitted through a voice-grade telephone channel of bandwidth 3.4 kHz. All 12 samples stored in the terminal are equiprobable and independent. The channel output signal to noise ratio is 15 dB. The channel capacity. C and maximum symbol rate, fs for error free transmission is :

Find the distance between object (O) and final image formed after two successive reflections. Take the first reflection on mirror M1 having radius of curvature 20 cm

A body is thrown with a velocity of 20 ms−1 from a building of height 15 m. If the angle of projection is 30∘ above the horizontal, the time of flight and the range of the projectile are respectively. (Take g=10 m/s2)

Let [ϵ0] denote the dimensional formula of the permittivity of vacuum. If M= mass, L= length, T= time and A= electric current, then:

puelengthlength(4) None of theseThe power of a pump which can pump 200 kgof water to a height of 200 m in 10 s is-Q.17(g= 10 m/s2)\lbrack EAMCET MED-98\rbrack(1) 40 KW(2) 80 KW(3) 4000 KW(4) 960 KW

Six point charges are placed on the vertices of regular hexagon of side 1 m as shown in the figure. The net electric field at the centre of hexagon isthe charges are +q,-q,-q,+q,+q,-q respectively.

A swimmer's speed in the direction of the flow of river is 16 km/h. Against the direction of flow of river, the swimmer's speed is 8 km/h. Calculate the swimmer's speed in still water and speed of flow of the river respectively.

A 900 kg car moving at 10 m/s takes a turn around a circular path of radius 25 m. The centripetal acceleration and the centripetal force acting on the car is given by (Neglect friction between all surfaces)

Two metal cubes with 3 cm edges of copper and aluminium are arranged as shown in the figure. The total thermal current from one reservoir to the other will be(Thermal conductivity, KCu=385 W/m-K, KAl=209 W/m-K)

A stone of mass 0.05 kg is thrown vertically upwards. What is the direction and magnitude of net force on the stone during its upward motion?

Two exactly similar wires are stretched by the same load and difference in their elongation is 2.5×10∧(-3). If thier elasticities are in the ratio 5:3,find their individual elongations

Find the greatest length of steel wire that can hang vertically without breaking. Breaking stress of steel is σm and the density of wire is ρ.

A radioactive nucleus of mass number 'A', initially at rest, emits an α - particle with a speed 'v'. What will be the recoil speed of the daughter nucleus?

Choose the correct option based on the prallelogram ABCD.

38. A charged particle is projected in a magnetic field . If the acceleration of charged particle in this field is found to be , then value of x 1. 2/3 2. 4/3 3. 1/3 4. 3

A moving-coil galvanometer has 100 turns and each turn has an area 2.0 cm2. The magnetic field produced by the magnet is 0.01 T. The deflection in the coil is 0.05 radian when a current of 10 mA is passed through it. Find the torsional constant of the suspension wire.

A person wishes to hit target from a tower of height 32 m by throwing a projectile at 10 m/s aiming directly to it as shown in figure. How short from target will the projectile fall? (g=10 m/s2)Write until two digits after the decimal point.

Two balls of masses 2 kg and 4 kg are moved towards each other with velocities 4 m/s and 2 m/s respectively on a frictionless surface. Find the impulse of maximum deformation for the ball of 4 kg mass.

why Fe has less radius than Na

The systen shown in the figure remains stable when

In a region, the potential is represented by V(x,y,z)=6x−8xy−8y+6yz, where V is in Volts and x,y,z are in meters. The electric force experienced by a charge of 2 coulombs situated at the point (1,1,1) is:-

Why like charges repel and opposite charges attract descibe in detail with basic concepts

When 100 volts dc is applied across a solenoid a current of 1ampere flows in it. When 100 volts ac is applied across the same coil,the current drops to 0.5 ampere. If frequency of the ac source is 50Hz, what are the impedence and inductance of solenoid?

When a satellite in a circular orbit around the earth enters the atmospheric region, it encounters small air resistance to its motion. Then -

A charge Q is placed at the centre of a square. If electric field intensity die to the charge at the corners of the square is E1 , and the intensity at the mid point of the side of the square is E2 then find E1/E2

Find the incorrect option for the general rotation of a wheel of radius r which can be viewed as pure translation with velocity →V0 and pure rotation about O with →ω.

what is carnot engine.draw gh graph for this.write its working and constructio

If the energy of the radiations is enough then can the photoelectron emitted travel at the speed of light ( or even more )In that case will the electron gain mass?

The ammeter shown in figure consists of a 480 Ω coil connected in parallel to a 20 Ω shunt. Find the reading of the ammeter.

The coefficient of static friction between a wooden block of mass 0.5 kg and a vertical rough wall is 0.2. The minimum magnitude of horizontal force that should be applied on the block to keep it adhere to the wall will be ______ N. [g=10 ms−2]

Why potential decrease in the direction of electric field?

A particle is moving along a straight line has a velocity v m/s when it cleared a distance y metre. These two are connected by the relation v =49+y.When its velocity is 1 m/s,its acceleration is

In a diffraction pattern for a small pin hole, if the size of hole is increased(1) Size of central bright increases(2) Intensity increases(3) Intensity decreases(4) Size of central bright remains same.

For two conducting concentric spherical shells of radius R1 and R2 respectively with charges Q1 and Q2 respectively find the a)the potential at the common centre b)potential difference between the two spherical shells

The mass of a hydrogen molecule is 3.32×10−27 kg. 1023 hydrogen molecules strike per second on a fixed wall of area 2 cm2 at an angle of 45∘ to the normal. They rebound elastically with a speed of 103 m/s, then the pressure on the wall is nearly,