50278 + Interview Questions in Physics

1.	37.Verify the wave function given in figure is a solution to the linear Wave Equation x and y are in centimetre
Answer» 37.Verify the wave function given in figure is a solution to the linear Wave Equation x and y are in centimetre

Discussion

2.	A ray of light incident at a certain angle on a refracting face of the prism emerges from the other face normally. If the angle of prism is 3^° and prism is made of a material of refractive index 1.63 the angle of incidence is approximatel
Answer» A ray of light incident at a certain angle on a refracting face of the prism emerges from the other face normally. If the angle of prism is 3^° and prism is made of a material of refractive index 1.63 the angle of incidence is approximatel

Discussion

3.	The figure shows an estimated force time graph for a baseball stuck by a bat. From the curve, determine the impulse delivered to the ball
Answer» The figure shows an estimated force time graph for a baseball stuck by a bat. From the curve, determine the impulse delivered to the ball

Discussion

4.	29.For the given incident ray as shown in figure the condition for total internal reflection of this way the required refractive index of prism will be
Answer» 29.For the given incident ray as shown in figure the condition for total internal reflection of this way the required refractive index of prism will be

Discussion

5.	State the main precautions to be taken in finding the latent heat of steam.
Answer» State the main precautions to be taken in finding the latent heat of steam.

Discussion

6.	In cogeneration power plant with power load of 5.6 MW and heating load of 2 MW. Steam is generated at 40 bar and 500∘C and expanded isentropically to 0.06 bar. For process heating the steam is extracted at 2 bar and condensed to saturated liquid at 2 bar. Steam generation required to fulfill the requirement is ____ tonnes per hour.At 40 bar, 500∘C.h = 3445.3 kJ/kgs = 7.0901 kJ/kgK16
Answer» In cogeneration power plant with power load of 5.6 MW and heating load of 2 MW. Steam is generated at 40 bar and $500^{\circ} C$ and expanded isentropically to 0.06 bar. For process heating the steam is extracted at 2 bar and condensed to saturated liquid at 2 bar. Steam generation required to fulfill the requirement is ____ tonnes per hour. At 40 bar, $500^{\circ} C$ . h = 3445.3 kJ/kg s = 7.0901 kJ/kgK 16

6.

In cogeneration power plant with power load of 5.6 MW and heating load of 2 MW. Steam is generated at 40 bar and 500∘C and expanded isentropically to 0.06 bar. For process heating the steam is extracted at 2 bar and condensed to saturated liquid at 2 bar. Steam generation required to fulfill the requirement is ____ tonnes per hour.At 40 bar, 500∘C.h = 3445.3 kJ/kgs = 7.0901 kJ/kgK16

Answer»

In cogeneration power plant with power load of 5.6 MW and heating load of 2 MW. Steam is generated at 40 bar and $500^{\circ} C$ and expanded isentropically to 0.06 bar. For process heating the steam is extracted at 2 bar and condensed to saturated liquid at 2 bar. Steam generation required to fulfill the requirement is ____ tonnes per hour.

At 40 bar, $500^{\circ} C$ .

h = 3445.3 kJ/kg

s = 7.0901 kJ/kgK

16

Discussion

7.	The maximum speed and acceleration of a particle executing simple harmonic motion are 10cms−1 and 50cms−2. Find the position(s) of the particle when the speed is 8cm−1.
Answer» The maximum speed and acceleration of a particle executing simple harmonic motion are $10 c m s^{- 1} a n d 50 c m s^{- 2}$ . Find the position(s) of the particle when the speed is $8 c m^{- 1}$ .

Discussion

8.	What is the derivation of the SI unit of angular momentum
Answer» What is the derivation of the SI unit of angular momentum

Discussion

9.	32. A force of 4x2+3x N acts on a particle which displaces it from x=2, to x=3 the work done by the force
Answer» 32. A force of 4x2+3x N acts on a particle which displaces it from x=2, to x=3 the work done by the force

Discussion

10.	When a projectile is fired at an angle from the ground, it represents a
Answer» When a projectile is fired at an angle from the ground, it represents a

Discussion

11.	Two resis†an ces r1 & r2, when connected separately to the same potential difference, it was seen that the current flowing through r1 was six times the current flowing through r2. Determine the ratio of r1 & r2?
Answer» Two resis†an ces r1 & r2, when connected separately to the same potential difference, it was seen that the current flowing through r1 was six times the current flowing through r2. Determine the ratio of r1 & r2?

Discussion

12.	A particle carrying charge equal to 100 times the charge of an electron is performing one rotation per second in a circular path of radius 0.8 m. The value of magnetic field produced at the centre will be ( μ0= permeability for vaccum )
Answer» A particle carrying charge equal to $100$ times the charge of an electron is performing one rotation per second in a circular path of radius $0.8 m$ . The value of magnetic field produced at the centre will be ( $μ_{0} =$ permeability for vaccum )

Discussion

13.	A long taut string is connected to a harmonic oscillator of frequency f at one end. The oscillator oscillates with an amplitude a0 and delivers power P0 to the string. Due to dissipation of energy, the amplitude of wave goes on decreasing with distance x from the oscillator as a=a0e−kx. In what length of the string does (34)th of the energy supplied by the oscillator get dissipated?
Answer» A long taut string is connected to a harmonic oscillator of frequency $f$ at one end. The oscillator oscillates with an amplitude $a_{0}$ and delivers power $P_{0}$ to the string. Due to dissipation of energy, the amplitude of wave goes on decreasing with distance $x$ from the oscillator as $a = a_{0} e^{- k x} .$ In what length of the string does ${(\frac{3}{4})}^{t h}$ of the energy supplied by the oscillator get dissipated?

Discussion

14.	A lab assistant has to write the equation of a spring block system doing SHM. At t = 0 the block is in the condition as shown above.He writes the equation as x=A sin(ω t+ϕ). Find the value of ϕ?
Answer» A lab assistant has to write the equation of a spring block system doing SHM. At t = 0 the block is in the condition as shown above.He writes the equation as $x = A s i n (ω t + ϕ)$ . Find the value of $ϕ$ ?

14.

A lab assistant has to write the equation of a spring block system doing SHM. At t = 0 the block is in the condition as shown above.He writes the equation as x=A sin(ω t+ϕ). Find the value of ϕ?

Answer»

A lab assistant has to write the equation of a spring block system doing SHM. At t = 0 the block is in the condition as shown above.He writes the equation as $x = A s i n (ω t + ϕ)$ . Find the value of $ϕ$ ?

Discussion

15.	To get an output Y=1 in a given circuit, which of the following input will be correct?
Answer» To get an output $Y = 1$ in a given circuit, which of the following input will be correct?

Discussion

16.	A particle of mass m1 is moving with velocity v1 and another particle of mass m2 is moving with velocity v2.Both of them have the same momentum but different kinetic energy are E1 and E2.If m1 >m2 then1)E1E24)E1=E2
Answer» A particle of mass m1 is moving with velocity v1 and another particle of mass m2 is moving with velocity v2.Both of them have the same momentum but different kinetic energy are E1 and E2.If m1 >m2 then 1)E1E2 4)E1=E2

Discussion

17.	The focal lengths of the objective and eye-lens of a microscope are 1 cm and 5 cm respectively. If the magnifying power for the relaxed eye is 45, then the length of the tube is [CPMT 1979]
Answer» The focal lengths of the objective and eye-lens of a microscope are 1 cm and 5 cm respectively. If the magnifying power for the relaxed eye is 45, then the length of the tube is [CPMT 1979]

Discussion

18.	Tap on the bubbles that give the result as 12.
Answer» Tap on the bubbles that give the result as 12.

Discussion

19.	A projectile is projected with a speed 30m/s at an angle 30^° with the vertical.the speed of the projectile when its direction of motion makes an angle 30^° with the horizontal i
Answer» A projectile is projected with a speed 30m/s at an angle 30^° with the vertical.the speed of the projectile when its direction of motion makes an angle 30^° with the horizontal i

Discussion

20.	21. In an interference pattern the position of zeroth order maxima is 4.8 mm from a certain point on a screen. The frige width is .2 mm the position of 2nd order minima grom point p is?
Answer» 21. In an interference pattern the position of zeroth order maxima is 4.8 mm from a certain point on a screen. The frige width is .2 mm the position of 2nd order minima grom point p is?

Discussion

21.	A train overtakes two persons who are walking in the same direction in which the train is going at the speed of 2kmph and 4 kmph and passes them completely in 9 seconds and 10 seconds respectively.Find the length and speed of the train.
Answer» A train overtakes two persons who are walking in the same direction in which the train is going at the speed of 2kmph and 4 kmph and passes them completely in 9 seconds and 10 seconds respectively.Find the length and speed of the train.

Discussion

22.	A square gate of size 1 m×1 m is hinged at its midpoint. A fluid of density ρ fills the space to the left of the gate. The force F required to hold the gate stationary is
Answer» A square gate of size $1 m \times 1 m$ is hinged at its midpoint. A fluid of density $ρ$ fills the space to the left of the gate. The force $F$ required to hold the gate stationary is

Discussion

23.	In the shown figure, two point masses m are joined by a massless rod of length 5.5 m. The lower end of the mass system is dragged with constant velocity v0, rightwards. The kinetic energy of the system, if θ=53∘is: (correct answer + 1, wrong answer - 0.25)
Answer» In the shown figure, two point masses $m$ are joined by a massless rod of length $5.5 m$ . The lower end of the mass system is dragged with constant velocity $v_{0}$ , rightwards. The kinetic energy of the system, if $θ = 53^{\circ}$ is: (correct answer + 1, wrong answer - 0.25)

Discussion

24.	Two insulating plates are both uniformly charged in such a way that the potential difference between them is V2−V1=20V, (i.e., plate 2 is at a higher potential). The plates are separated by d=0.1 m and can be treated as infinitely large. An electron is released from rest on the inner surface of plate 1. What is its speed when it hits to plate 2? e=1.6×10−19C,me=9.11×10−31kg
Answer» Two insulating plates are both uniformly charged in such a way that the potential difference between them is $V_{2} - V_{1} = 20 V$ , (i.e., plate 2 is at a higher potential). The plates are separated by d=0.1 m and can be treated as infinitely large. An electron is released from rest on the inner surface of plate 1. What is its speed when it hits to plate 2? $e = 1.6 \times 10^{- 19} C, m_{e} = 9.11 \times 10^{- 31} k g$

Discussion

25.	In a test experiment on a model aeroplane in a wind tunnel, the flow speeds of air on the lower and upper surfaces of the wing are v and √2v respectively. If the density of air is ρ and the surface area of the wing is A, the dynamic lift on the wing is given by
Answer» In a test experiment on a model aeroplane in a wind tunnel, the flow speeds of air on the lower and upper surfaces of the wing are $v$ and $\sqrt{2} v$ respectively. If the density of air is $ρ$ and the surface area of the wing is $A$ , the dynamic lift on the wing is given by

Discussion

26.	11. Two metal spheres, one of radius R and theother of radius 2R both have same surfacecharge density o. They are brought in contact andseparated. The surface charge density of biggersphere becomes
Answer» 11. Two metal spheres, one of radius R and theother of radius 2R both have same surfacecharge density o. They are brought in contact andseparated. The surface charge density of biggersphere becomes

Discussion

27.	A projectile is thrown into space so as to have a maximum possible horizontal range of 400 metres.Taking the point of projection as the origin,the co-ordinates of the point where the velocity of the projectile is minimum are?
Answer» A projectile is thrown into space so as to have a maximum possible horizontal range of 400 metres.Taking the point of projection as the origin,the co-ordinates of the point where the velocity of the projectile is minimum are?

Discussion

28.	A charged body is kept in an electric field where it experiences a constant acceleration of 10 m/s2 in the positive x-direction. The body hits wall after travelling 4 m and rebounds but can travel only upto 2 m before coming to momentarilyrest. if the body was in contact with the wall for 12 ms then find the average acceleration of it during the impact?
Answer» A charged body is kept in an electric field where it experiences a constant acceleration of 10 m/ $s^{2}$ in the positive x-direction. The body hits wall after travelling 4 m and rebounds but can travel only upto 2 m before coming to momentarilyrest. if the body was in contact with the wall for 12 ms then find the average acceleration of it during the impact?

Discussion

29.	A wire having a semi circular loop of radius r carries a current i as shown in figure. The magnetic field at the center C due to entire wire is
Answer» A wire having a semi circular loop of radius $r$ carries a current $i$ as shown in figure. The magnetic field at the center $C$ due to entire wire is

Discussion

30.	25. The period of a simple pendulum on the surface of earth is T. At an attitude of half of the radius of35.1earth from the surface, its period will be
Answer» 25. The period of a simple pendulum on the surface of earth is T. At an attitude of half of the radius of35.1earth from the surface, its period will be

Discussion

31.	A metal wire having poisson ratio 1/4 and young's modulus 4×1010 N/m2 is stretched by a force, which produces a lateral strain of 0.01% in it. The elastic potential energy stored per unit volume in wire is (in J/m3)
Answer» A metal wire having poisson ratio $1 / 4$ and young's modulus $4 \times 10^{10} {N/m}^{2}$ is stretched by a force, which produces a lateral strain of $0.01 %$ in it. The elastic potential energy stored per unit volume in wire is (in ${J/m}^{3}$ )

Discussion

32.	A container of length 4 m, width 2 m and height 3 m is kept on a horizontal floor. A bee enters the container from a hole at bottom-most corner (A) and comes out of the hole(B) at diagonally opposite corner. If the displacement of bee is maximum when it comes out, what is its displacement ?
Answer» A container of length $4 m$ , width $2 m$ and height $3 m$ is kept on a horizontal floor. A bee enters the container from a hole at bottom-most corner $(A)$ and comes out of the hole $(B)$ at diagonally opposite corner. If the displacement of bee is maximum when it comes out, what is its displacement ?

Discussion

33.	A ball is projected with a velocity u at an elevation from a point distance d from a smooth vertical wall in a plane perpendicular to it. After rebounding from the wall, it returns to the point of projection, find the maximum distance d for which the ball can return to the point of projection.
Answer» A ball is projected with a velocity $u$ at an elevation from a point distance d from a smooth vertical wall in a plane perpendicular to it. After rebounding from the wall, it returns to the point of projection, find the maximum distance $d$ for which the ball can return to the point of projection.

33.

A ball is projected with a velocity u at an elevation from a point distance d from a smooth vertical wall in a plane perpendicular to it. After rebounding from the wall, it returns to the point of projection, find the maximum distance d for which the ball can return to the point of projection.

Answer»

A ball is projected with a velocity $u$ at an elevation from a point distance d from a smooth vertical wall in a plane perpendicular to it. After rebounding from the wall, it returns to the point of projection, find the maximum distance $d$ for which the ball can return to the point of projection.

Discussion

34.	A particle A is projected with an initial velocity of 60 m/s at an angle 30∘ to the horizontal. At the same time, a second particle B is projected in direction as shown in figure with initial speed of 50 m/s from a point at a distance of 100 m from A. If the particles collide in air, find the time when the particles collide.
Answer» A particle $A$ is projected with an initial velocity of $60 m / s$ at an angle $30^{\circ}$ to the horizontal. At the same time, a second particle $B$ is projected in direction as shown in figure with initial speed of $50 m / s$ from a point at a distance of $100 m$ from $A$ . If the particles collide in air, find the time when the particles collide.

Discussion

35.	ble }29: What is the equivalent weight of hydride of metal if equivalent weight of its oxide is }20 ?}
Answer» ble }29: What is the equivalent weight of hydride of metal if equivalent weight of its oxide is }20 ?}

Discussion

36.	Two spheres P and Q of equal radii have densities ρ1 and ρ2, respectively. The spheres are connected by a massless string and placed in liquids L1 and L2 of densities σ1 and σ2 and viscosities η1 and η2, respectively. They float in equilibrium with the sphere P in L1 and sphere Q in L2 and the string being taut. If sphere P along in L2 has terminal velocity →VP and Q along in L1 has terminal velocity →VQ, then
Answer» Two spheres P and Q of equal radii have densities $ρ_{1}$ and $ρ_{2}$ , respectively. The spheres are connected by a massless string and placed in liquids $L_{1}$ and $L_{2}$ of densities $σ_{1}$ and $σ_{2}$ and viscosities $η_{1}$ and $η_{2}$ , respectively. They float in equilibrium with the sphere P in $L_{1}$ and sphere Q in $L_{2}$ and the string being taut. If sphere P along in $L_{2}$ has terminal velocity ${\to V}_{P}$ and Q along in $L_{1}$ has terminal velocity ${\to V}_{Q}$ , then

Discussion

37.	A circular disc is rotating with constant angular velocity ω about an axis that passes through the centre. A particle 'P' is kept at a distance of 2m from the centre and another particle 'Q' at a distance of 3m from the centre. Which of these will have higher centripetal acceleration?
Answer» A circular disc is rotating with constant angular velocity ω about an axis that passes through the centre. A particle 'P' is kept at a distance of 2m from the centre and another particle 'Q' at a distance of 3m from the centre. Which of these will have higher centripetal acceleration?

37.

A circular disc is rotating with constant angular velocity ω about an axis that passes through the centre. A particle 'P' is kept at a distance of 2m from the centre and another particle 'Q' at a distance of 3m from the centre. Which of these will have higher centripetal acceleration?

Answer»

A circular disc is rotating with constant angular velocity ω about an axis that passes through the centre. A particle 'P' is kept at a distance of 2m from the centre and another particle 'Q' at a distance of 3m from the centre.

Which of these will have higher centripetal acceleration?

Discussion

38.	Find the equivalent resistance between points A and B of the following network shown in the given diagram?
Answer» Find the equivalent resistance between points A and B of the following network shown in the given diagram?

Discussion

39.	Time-velocity graph of a body is shown in the fig. Find its acceleration in m/s2.
Answer» Time-velocity graph of a body is shown in the fig. Find its acceleration in m/s².

39.

Time-velocity graph of a body is shown in the fig. Find its acceleration in m/s2.

Answer»

Time-velocity graph of a body is shown in the fig. Find its acceleration in m/s².

Discussion

40.	The output characteristics of a transistor is shown in the figure. When VCE is 10 V, and IC=4.0 mA, then value of βac is ________.
Answer» The output characteristics of a transistor is shown in the figure. When $V_{C E}$ is $10 V,$ and $I_{C} = 4.0 mA,$ then value of $β_{a c}$ is ________.

Discussion

41.	24.Two capacitors C1 and C2 are charged to 120V and 200V respectively. It is found that by connecting them together the potential on each one can be zero. Then A 3C1 + 5C2 = 0 B 9C1 + 4C2 = 0 C. 5C1=3C2 D 3C1=5C2
Answer» 24.Two capacitors C1 and C2 are charged to 120V and 200V respectively. It is found that by connecting them together the potential on each one can be zero. Then A 3C1 + 5C2 = 0 B 9C1 + 4C2 = 0 C. 5C1=3C2 D 3C1=5C2

Discussion

42.	Why do we require grid for transmission of electricity?
Answer» Why do we require grid for transmission of electricity?

Discussion

43.	A car Is moving with a speed of 40 kilometre per hour can be stopped by applying brakes info with the same car is moving with a speed of 80 km per hour the minimum stopping distance is (Assume constant retardation)
Answer» A car Is moving with a speed of 40 kilometre per hour can be stopped by applying brakes info with the same car is moving with a speed of 80 km per hour the minimum stopping distance is (Assume constant retardation)

Discussion

44.	what happen when one slit in YDS experiment in covered
Answer» what happen when one slit in YDS experiment in covered

Discussion

45.	A sphere of radius R has charge q uniformly distributed inside it. At what minimum distance from it's surface the electric potential is half of the electric potential at the centre.
Answer» A sphere of radius R has charge q uniformly distributed inside it. At what minimum distance from it's surface the electric potential is half of the electric potential at the centre.

Discussion

46.	cot15 degree
Answer» cot15 degree

Discussion

47.	separation between the charges is r points A is at distance r from -q B is at a distance of r from +q charge and c is the distance mid point find the net electric field A,B,C
Answer» separation between the charges is r points A is at distance r from -q B is at a distance of r from +q charge and c is the distance mid point find the net electric field A,B,C

Discussion

48.	A long charged cylinderof linear charged density λ issurrounded by a hollow co-axial conducting cylinder. What is theelectric field in the space between the two cylinders?
Answer» A long charged cylinder of linear charged density λ is surrounded by a hollow co-axial conducting cylinder. What is the electric field in the space between the two cylinders?

Discussion

49.	Two identical metal spheres P and Q are supported on insulating stands and placed in contact. What kind of charges will P and Q develop when a negatively charged ebonite rod is brought near P?
Answer» Two identical metal spheres P and Q are supported on insulating stands and placed in contact. What kind of charges will P and Q develop when a negatively charged ebonite rod is brought near P?

Discussion

50.	Light of wavelength 520 nm passing through a double slit, produces interference pattern of relative intensity versus deflection angle θ as shown in the figure. Find the separation d between the slits.
Answer» Light of wavelength $520 nm$ passing through a double slit, produces interference pattern of relative intensity versus deflection angle $θ$ as shown in the figure. Find the separation $d$ between the slits.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

37.Verify the wave function given in figure is a solution to the linear Wave Equation x and y are in centimetre

A ray of light incident at a certain angle on a refracting face of the prism emerges from the other face normally. If the angle of prism is 3^° and prism is made of a material of refractive index 1.63 the angle of incidence is approximatel

The figure shows an estimated force time graph for a baseball stuck by a bat. From the curve, determine the impulse delivered to the ball

29.For the given incident ray as shown in figure the condition for total internal reflection of this way the required refractive index of prism will be

State the main precautions to be taken in finding the latent heat of steam.

The maximum speed and acceleration of a particle executing simple harmonic motion are 10cms−1 and 50cms−2. Find the position(s) of the particle when the speed is 8cm−1.

What is the derivation of the SI unit of angular momentum

32. A force of 4x2+3x N acts on a particle which displaces it from x=2, to x=3 the work done by the force

When a projectile is fired at an angle from the ground, it represents a

Two resis†an ces r1 & r2, when connected separately to the same potential difference, it was seen that the current flowing through r1 was six times the current flowing through r2. Determine the ratio of r1 & r2?

A particle carrying charge equal to 100 times the charge of an electron is performing one rotation per second in a circular path of radius 0.8 m. The value of magnetic field produced at the centre will be ( μ0= permeability for vaccum )

A lab assistant has to write the equation of a spring block system doing SHM. At t = 0 the block is in the condition as shown above.He writes the equation as x=A sin(ω t+ϕ). Find the value of ϕ?

To get an output Y=1 in a given circuit, which of the following input will be correct?

A particle of mass m1 is moving with velocity v1 and another particle of mass m2 is moving with velocity v2.Both of them have the same momentum but different kinetic energy are E1 and E2.If m1 >m2 then1)E1E24)E1=E2

The focal lengths of the objective and eye-lens of a microscope are 1 cm and 5 cm respectively. If the magnifying power for the relaxed eye is 45, then the length of the tube is [CPMT 1979]

Tap on the bubbles that give the result as 12.

A projectile is projected with a speed 30m/s at an angle 30^° with the vertical.the speed of the projectile when its direction of motion makes an angle 30^° with the horizontal i

21. In an interference pattern the position of zeroth order maxima is 4.8 mm from a certain point on a screen. The frige width is .2 mm the position of 2nd order minima grom point p is?

A train overtakes two persons who are walking in the same direction in which the train is going at the speed of 2kmph and 4 kmph and passes them completely in 9 seconds and 10 seconds respectively.Find the length and speed of the train.

A square gate of size 1 m×1 m is hinged at its midpoint. A fluid of density ρ fills the space to the left of the gate. The force F required to hold the gate stationary is

In the shown figure, two point masses m are joined by a massless rod of length 5.5 m. The lower end of the mass system is dragged with constant velocity v0, rightwards. The kinetic energy of the system, if θ=53∘is: (correct answer + 1, wrong answer - 0.25)

In a test experiment on a model aeroplane in a wind tunnel, the flow speeds of air on the lower and upper surfaces of the wing are v and √2v respectively. If the density of air is ρ and the surface area of the wing is A, the dynamic lift on the wing is given by

11. Two metal spheres, one of radius R and theother of radius 2R both have same surfacecharge density o. They are brought in contact andseparated. The surface charge density of biggersphere becomes

A projectile is thrown into space so as to have a maximum possible horizontal range of 400 metres.Taking the point of projection as the origin,the co-ordinates of the point where the velocity of the projectile is minimum are?

A wire having a semi circular loop of radius r carries a current i as shown in figure. The magnetic field at the center C due to entire wire is

25. The period of a simple pendulum on the surface of earth is T. At an attitude of half of the radius of35.1earth from the surface, its period will be

A metal wire having poisson ratio 1/4 and young's modulus 4×1010 N/m2 is stretched by a force, which produces a lateral strain of 0.01% in it. The elastic potential energy stored per unit volume in wire is (in J/m3)

A container of length 4 m, width 2 m and height 3 m is kept on a horizontal floor. A bee enters the container from a hole at bottom-most corner (A) and comes out of the hole(B) at diagonally opposite corner. If the displacement of bee is maximum when it comes out, what is its displacement ?

A ball is projected with a velocity u at an elevation from a point distance d from a smooth vertical wall in a plane perpendicular to it. After rebounding from the wall, it returns to the point of projection, find the maximum distance d for which the ball can return to the point of projection.

ble }29: What is the equivalent weight of hydride of metal if equivalent weight of its oxide is }20 ?}

A circular disc is rotating with constant angular velocity ω about an axis that passes through the centre. A particle 'P' is kept at a distance of 2m from the centre and another particle 'Q' at a distance of 3m from the centre. Which of these will have higher centripetal acceleration?

Find the equivalent resistance between points A and B of the following network shown in the given diagram?

Time-velocity graph of a body is shown in the fig. Find its acceleration in m/s2.

The output characteristics of a transistor is shown in the figure. When VCE is 10 V, and IC=4.0 mA, then value of βac is ________.

24.Two capacitors C1 and C2 are charged to 120V and 200V respectively. It is found that by connecting them together the potential on each one can be zero. Then A 3C1 + 5C2 = 0 B 9C1 + 4C2 = 0 C. 5C1=3C2 D 3C1=5C2

Why do we require grid for transmission of electricity?

A car Is moving with a speed of 40 kilometre per hour can be stopped by applying brakes info with the same car is moving with a speed of 80 km per hour the minimum stopping distance is (Assume constant retardation)

what happen when one slit in YDS experiment in covered

A sphere of radius R has charge q uniformly distributed inside it. At what minimum distance from it's surface the electric potential is half of the electric potential at the centre.

cot15 degree

separation between the charges is r points A is at distance r from -q B is at a distance of r from +q charge and c is the distance mid point find the net electric field A,B,C

A long charged cylinderof linear charged density λ issurrounded by a hollow co-axial conducting cylinder. What is theelectric field in the space between the two cylinders?

Two identical metal spheres P and Q are supported on insulating stands and placed in contact. What kind of charges will P and Q develop when a negatively charged ebonite rod is brought near P?

Light of wavelength 520 nm passing through a double slit, produces interference pattern of relative intensity versus deflection angle θ as shown in the figure. Find the separation d between the slits.