50278 + Interview Questions in Physics

1.	The energy released by the fission of one uranium atom is 200 MeV. The number of fissions per second required to produce 3.2 W of power is
Answer» The energy released by the fission of one uranium atom is 200 MeV. The number of fissions per second required to produce 3.2 W of power is

Discussion

2.	there is one tower of height H . one particle A is projected upwards from top of the tower with a speed u1 at time t=0 . At time t=tnot another particle B is projected upwards from the bottom of the tower with the speed u2. when will the particles cross each other.
Answer» there is one tower of height H . one particle A is projected upwards from top of the tower with a speed u1 at time t=0 . At time t=tnot another particle B is projected upwards from the bottom of the tower with the speed u2. when will the particles cross each other.

Discussion

3.	A dart is thrown horizontally with an initial speed of 10 m/s towards point P, the bull's eye on a dart board. It hits at the point Q on the rim, vertically below P, 0.2 seconds later, what is distance PQ?
Answer» A dart is thrown horizontally with an initial speed of 10 m/s towards point P, the bull's eye on a dart board. It hits at the point Q on the rim, vertically below P, 0.2 seconds later, what is distance PQ?

Discussion

4.	Diagram shows the top-view of an annular disc of mass 8 kg that can freely rotate about its centre. With a cat of mass 2 kg on its outer edge, it is initially rotating at an angular speed of 8 rad/s. What will be the increase in kinetic energy of the cat & ring system, if cat finally reaches to the inner edge.
Answer» Diagram shows the top-view of an annular disc of mass $8 kg$ that can freely rotate about its centre. With a cat of mass $2 kg$ on its outer edge, it is initially rotating at an angular speed of $8 rad/s$ . What will be the increase in kinetic energy of the cat $&$ ring system, if cat finally reaches to the inner edge.

Discussion

5.	suppose ideal gas follows an additional law V^2P^3 = cons†an t.Initial temperature and volume of gas are T and V respectively.If gas expands to 64V then its final temperature will become
Answer» suppose ideal gas follows an additional law V^2P^3 = cons†an t.Initial temperature and volume of gas are T and V respectively.If gas expands to 64V then its final temperature will become

Discussion

6.	A uniform metallic rod rotates about its perpendicular bisector with constant angular speed. If it is heated uniformly to raise its temperature slightly:- (1) Its speed of rotation increases(2) Its speed of rotation decreases(3) Its speed of rotation remains same(4) Its speed of rotation increases because itsmoment of inertia increases
Answer» A uniform metallic rod rotates about its perpendicular bisector with constant angular speed. If it is heated uniformly to raise its temperature slightly:- (1) Its speed of rotation increases(2) Its speed of rotation decreases(3) Its speed of rotation remains same(4) Its speed of rotation increases because itsmoment of inertia increases

Discussion

7.	Inside a hollow uniform sphere of mass 'M', a uniform rod of lenght 'R√2' is released from the state of rest. The mass of the rod is same as that of the sphere. If the inner radius of the hollow sphere is 'R' then find out horizontal displacement of sphere with respect to earth in the time in which the rod becomes horizontal.
Answer» Inside a hollow uniform sphere of mass 'M', a uniform rod of lenght 'R $\sqrt{2}$ ' is released from the state of rest. The mass of the rod is same as that of the sphere. If the inner radius of the hollow sphere is 'R' then find out horizontal displacement of sphere with respect to earth in the time in which the rod becomes horizontal.

Discussion

8.	Find the magnitude of work done by the field of a nucleus in π/5 of elliptical orbit of an electron?
Answer» Find the magnitude of work done by the field of a nucleus in π/5 of elliptical orbit of an electron?

Discussion

9.	The coefficient of volume expansion of glycerine is 49 × 10¯⁵ K¯¹. What is the fractional change in its density for a 30 °C rise in temperature ?
Answer» The coefficient of volume expansion of glycerine is 49 × 10¯⁵ K¯¹. What is the fractional change in its density for a 30 °C rise in temperature ?

Discussion

10.	A: If a body is thrown vertically upwards (from theearth surface) the distance covered by it in thelast second of upward motion is about 5 nmirrespective of its initial speed R: The distance covered in the last second ofupward motion is equal to that covered in thefirst second of downward motion when theparticle is dropped.
Answer» A: If a body is thrown vertically upwards (from theearth surface) the distance covered by it in thelast second of upward motion is about 5 nmirrespective of its initial speed R: The distance covered in the last second ofupward motion is equal to that covered in thefirst second of downward motion when theparticle is dropped.

Discussion

11.	If the gravitational potential energy of two point masses infinitely away is taken to be zero then gravitational potential energy of a galaxy is (1) Zero (3) Negative (2) (4) Positive Can have any value
Answer» If the gravitational potential energy of two point masses infinitely away is taken to be zero then gravitational potential energy of a galaxy is (1) Zero (3) Negative (2) (4) Positive Can have any value

Discussion

12.	Position time graph of a body of mass 5 kg isgiven in the diagram. The impulse on body att = 3 s, is(u)x1812-1 2 34 5(s))(2) -30i kg m s(1) 30i kg m s-1-1(3) 6/ kg m s-1
Answer» Position time graph of a body of mass 5 kg isgiven in the diagram. The impulse on body att = 3 s, is(u)x1812-1 2 34 5(s))(2) -30i kg m s(1) 30i kg m s-1-1(3) 6/ kg m s-1

Discussion

13.	A pulley (disc) of mass = 2kg and radius =10cm is attached with the block of mass m1= 4kg and m2=6kg with a light and stretchable string . The angular acceleration of the pulley is (assuming no slipping)
Answer» A pulley (disc) of mass = 2kg and radius =10cm is attached with the block of mass m1= 4kg and m2=6kg with a light and stretchable string . The angular acceleration of the pulley is (assuming no slipping)

Discussion

14.	A metal ball of radius R has a charge Q and capacitance C.The charge is changed from q to 2q. The capacitance changes to
Answer» A metal ball of radius $R$ has a charge $Q$ and capacitance $C$ .The charge is changed from $q$ to $2 q$ . The capacitance changes to

Discussion

15.	a train is passesan electric postin 10 s & a bridge of length 2km in110s.the speed of the engine ?
Answer» a train is passesan electric postin 10 s & a bridge of length 2km in110s.the speed of the engine ?

Discussion

16.	A 30 kW, 3-phase induction motor has full load slip of 3%, the stator losses amounts to 5% of the input and mechanical losses 1.5% of output. If the current in each rotor phase is 45 A, then the resistance per phase of the rotor is ________Ω.(Answer upto three decimal)0.155
Answer» A 30 kW, 3-phase induction motor has full load slip of 3%, the stator losses amounts to 5% of the input and mechanical losses 1.5% of output. If the current in each rotor phase is 45 A, then the resistance per phase of the rotor is ________ $Ω$ .(Answer upto three decimal) 0.155

Discussion

17.	{ (3) }8m/s} The velocity of a train increases at a constant rate }{f_1 from }0 to }v, then remains constant for an }} interval and finally decreases to zero at the }{ constant rate }f_2 . If }x be the total distance described }} then total time taken is
Answer» { (3) }8m/s} The velocity of a train increases at a constant rate }{f_1 from }0 to }v, then remains constant for an }} interval and finally decreases to zero at the }{ constant rate }f_2 . If }x be the total distance described }} then total time taken is

Discussion

18.	If the surface tension of a soap solution is 0.03 MKS units, then the excess of pressure inside a soap bubble of diameter 6 mm over the atmospheric pressure will be
Answer» If the surface tension of a soap solution is 0.03 MKS units, then the excess of pressure inside a soap bubble of diameter 6 mm over the atmospheric pressure will be

Discussion

19.	a mass spring system oscillates such that the mass moves on a rough surface with coefficient of friction u . it is compressed by a dis†an ce a fom its normal length and on being released it moves to a dis†an ce b from equilibrium position .the decrease in amplitude for one half cycle(-a to b) is
Answer» a mass spring system oscillates such that the mass moves on a rough surface with coefficient of friction u . it is compressed by a dis†an ce a fom its normal length and on being released it moves to a dis†an ce b from equilibrium position .the decrease in amplitude for one half cycle(-a to b) is

Discussion

20.	How does the incident ray become parallel to the emergent ray if angle of incidence is equal to angle of emergence ?
Answer» How does the incident ray become parallel to the emergent ray if angle of incidence is equal to angle of emergence ?

Discussion

21.	The position of an object changes from r=(2i^+j^)m to r1 =(4i^+3j^)m. Find its avg. Velocity
Answer» The position of an object changes from r=(2i^+j^)m to r1 =(4i^+3j^)m. Find its avg. Velocity

Discussion

22.	Q. The load against elongation graph is plotted for 4 wires of same material then the thinest wire will be represented in graph will be?
Answer» Q. The load against elongation graph is plotted for 4 wires of same material then the thinest wire will be represented in graph will be?

Discussion

23.	The wavelength of maximum energy released during an atomic explosion was 2.93×10−10 m. Given that Wein's constant is 2.93×10−3 m−K, the maximum temperature attained must be of the order of
Answer» The wavelength of maximum energy released during an atomic explosion was $2.93 \times 10^{- 10} m$ . Given that Wein's constant is $2.93 \times 10^{- 3} m^{- K}$ , the maximum temperature attained must be of the order of

Discussion

24.	In the example of a perfectly rigid body, as the points are of same material then can we take another thing common in the points as mass?
Answer» In the example of a perfectly rigid body, as the points are of same material then can we take another thing common in the points as mass?

Discussion

25.	A pendulum bob of mass 40 mg and carrying a charge of 2×10−8 C is at rest in a horizontal uniform electric field of 2×107 Vm−1. Calculate the tension in the thread of the pendulum and the angle it makes with the vertical.
Answer» A pendulum bob of mass $40 mg$ and carrying a charge of $2 \times 10^{- 8} C$ is at rest in a horizontal uniform electric field of $2 \times 10^{7} {Vm}^{- 1}$ . Calculate the tension in the thread of the pendulum and the angle it makes with the vertical.

Discussion

26.	A projectile is projected from the ground with a certain angle with horizontal.this projectile passes from two points (a,b) and (b,a), then find out range of this projectile
Answer» A projectile is projected from the ground with a certain angle with horizontal.this projectile passes from two points (a,b) and (b,a), then find out range of this projectile

Discussion

27.	how to derive electric potential due to dipole by using cos rule
Answer» how to derive electric potential due to dipole by using cos rule

Discussion

28.	A ball thrown up vertically returns to the thrower after 8 s. The velocity with which it was thrown up is -
Answer» A ball thrown up vertically returns to the thrower after $8 s$ . The velocity with which it was thrown up is -

Discussion

29.	Two parallel glass plates are dipped partly in a liquid of density ′d′ keeping them vertical. If the distance between the plates is ′x′, surface tension for the liquid is T and angle of contact is θ, then rise of liquid between the plates due to capillary action will be:
Answer» Two parallel glass plates are dipped partly in a liquid of density $^{'} d^{'}$ keeping them vertical. If the distance between the plates is $^{'} x^{'}$ , surface tension for the liquid is $T$ and angle of contact is $θ$ , then rise of liquid between the plates due to capillary action will be:

Discussion

30.	A bullet of mass m moving at a velocity v hits a wooden block of mass M suspended by a string from rigid support. If the bullet gets embedded in the block, how high will the block rise,if the block was initially at rest?
Answer» A bullet of mass m moving at a velocity v hits a wooden block of mass M suspended by a string from rigid support. If the bullet gets embedded in the block, how high will the block rise,if the block was initially at rest?

Discussion

31.	6 Consider 3rd orbit of He\ast (Helium) using non-relativistic approach the speed of electron in thisorbit will be (given K 9 x 109 constant Z - 2 andh (Planck's constant) 6.6 x 10-34 Js)\lbrack AIPMT-2015\rbrack(1) 3.0 x 108 m/s(3) 1.46 x 106 m/s(2) 2.92 x 106 m/s(4) 0.73 x 106 m/s
Answer» 6 Consider 3rd orbit of He\ast (Helium) using non-relativistic approach the speed of electron in thisorbit will be (given K 9 x 109 constant Z - 2 andh (Planck's constant) 6.6 x 10-34 Js)\lbrack AIPMT-2015\rbrack(1) 3.0 x 108 m/s(3) 1.46 x 106 m/s(2) 2.92 x 106 m/s(4) 0.73 x 106 m/s

Discussion

32.	Two resistors, R1 and R2 are connected in series. If the current through the resistor R1 is 2 A and the power dissipated in the resistor R2 is 10 W, then the value of resistance of the resistor R2 is
Answer» Two resistors, $R_{1}$ and $R_{2}$ are connected in series. If the current through the resistor $R_{1}$ is $2 A$ and the power dissipated in the resistor $R_{2}$ is $10 W,$ then the value of resistance of the resistor $R_{2}$ is

Discussion

33.	Dear Sir/Madam I am unable to understand in questions, when to equate the forces and when to equate the work done by the respective forces in similar conditions. Example: An object of mass m is suspended with an unstretched vertical spring. Whem mass m is just released after connecting to the spring, what is the masimum elongation of the spring? In this question, 1. If I equate the net 'forces' acting on the mass after the total elongation i.e. mg= kx, I get x=mg/k 2. However if I equate the work done by gravitation force and spring force i.e. mgx=1/2kx^2, I get x = 2mg/x which is the answer. Kindly help me understand when to equate forces and work done in such questions?
Answer» Dear Sir/Madam I am unable to understand in questions, when to equate the forces and when to equate the work done by the respective forces in similar conditions. Example: An object of mass m is suspended with an unstretched vertical spring. Whem mass m is just released after connecting to the spring, what is the masimum elongation of the spring? In this question, 1. If I equate the net 'forces' acting on the mass after the total elongation i.e. mg= kx, I get x=mg/k 2. However if I equate the work done by gravitation force and spring force i.e. mgx=1/2kx^2, I get x = 2mg/x which is the answer. Kindly help me understand when to equate forces and work done in such questions?

Discussion

34.	(a) In a metre bridge [Fig. 3.27], the balance point isfound to be at 39.5 cm from the end A,when the resistor Y isof 12.5 Ω. Determine theresistance of X.Why are the connections between resistors in a Wheatstone or meterbridge made of thick copper strips?(b) Determinethe balance point of the bridge above if Xand Y areinterchanged.(c) What happens if the galvanometer and cell areinterchanged at the balance point of the bridge? Would thegalvanometer show any current?
Answer» (a) In a metre bridge [Fig. 3.27], the balance point is found to be at 39.5 cm from the end A, when the resistor Y is of 12.5 Ω. Determine the resistance of X. Why are the connections between resistors in a Wheatstone or meter bridge made of thick copper strips? (b) Determine the balance point of the bridge above if X and Y are interchanged. (c) What happens if the galvanometer and cell are interchanged at the balance point of the bridge? Would the galvanometer show any current?

34.

(a) In a metre bridge [Fig. 3.27], the balance point isfound to be at 39.5 cm from the end A,when the resistor Y isof 12.5 Ω. Determine theresistance of X.Why are the connections between resistors in a Wheatstone or meterbridge made of thick copper strips?(b) Determinethe balance point of the bridge above if Xand Y areinterchanged.(c) What happens if the galvanometer and cell areinterchanged at the balance point of the bridge? Would thegalvanometer show any current?

Answer»

(a) In a metre bridge [Fig. 3.27], the balance point is
found to be at 39.5 cm from the end A,
when the resistor Y is
of 12.5 Ω. Determine the
resistance of X.
Why are the connections between resistors in a Wheatstone or meter
bridge made of thick copper strips?

(b) Determine
the balance point of the bridge above if X
and Y are
interchanged.

(c) What happens if the galvanometer and cell are
interchanged at the balance point of the bridge? Would the
galvanometer show any current?

Discussion

35.	The voltage gain of an amplifer with 9% negative feedback is 10. The voltage gain without feedback will be
Answer» The voltage gain of an amplifer with 9% negative feedback is 10. The voltage gain without feedback will be

Discussion

36.	Which of the following options represents correct dimensions of ϵo?
Answer» Which of the following options represents correct dimensions of $ϵ_{o}$ ?

Discussion

37.	prove that half of work done by battery get stored in inductor
Answer» prove that half of work done by battery get stored in inductor

Discussion

38.	What is the net force on a capacitor
Answer» What is the net force on a capacitor

Discussion

39.	A particle is projected with a velocity u, at an angle α, with the horizontal. Time at which its vertical component of velocity becomes half of its net speed at the highest point will be
Answer» A particle is projected with a velocity $u$ , at an angle $α$ , with the horizontal. Time at which its vertical component of velocity becomes half of its net speed at the highest point will be

Discussion

40.	Find electric field at a point p (1,2,4 )due to -2c at origin and 5c at (3,4,-1)?
Answer» Find electric field at a point p (1,2,4 )due to -2c at origin and 5c at (3,4,-1)?

Discussion

41.	find the electric potential at the point O due to segment of ring that make angle 60 degree at centre whose linear charge density is 4 C/m is ?
Answer» find the electric potential at the point O due to segment of ring that make angle 60 degree at centre whose linear charge density is 4 C/m is ?

Discussion

42.	In an arrangement four particles, each of mass 2 gram are situated at the coordinate points (3, 2, 0), (1, -1, 0), (0, 0, 0) and (-1, -1, 0). The moment of inertia of this arrangement about the z-axis will be:
Answer» In an arrangement four particles, each of mass 2 gram are situated at the coordinate points (3, 2, 0), (1, -1, 0), (0, 0, 0) and (-1, -1, 0). The moment of inertia of this arrangement about the z-axis will be:

Discussion

43.	Two persons do the same amount of work. The first person does it in 10 s and the second person, in 20 s. Find the ratio of the power used by the first person to that by the second person.
Answer» Two persons do the same amount of work. The first person does it in $10 s$ and the second person, in $20 s$ . Find the ratio of the power used by the first person to that by the second person.

Discussion

44.	the propelling force of a rocket increases uniformly from 0 to 5 Newton in the first 12 m and remains constant for the next 40 metre find the total work done?
Answer» the propelling force of a rocket increases uniformly from 0 to 5 Newton in the first 12 m and remains constant for the next 40 metre find the total work done?

Discussion

45.	What happens to an ideal gas when temperature is increases and the pressure is kept constant?
Answer» What happens to an ideal gas when temperature is increases and the pressure is kept constant?

45.

What happens to an ideal gas when temperature is increases and the pressure is kept constant?

Answer»

What happens to an ideal gas when temperature is increases and the pressure is kept constant?

Discussion

46.	A charged particle moving without acceleration produces an electricas well as a magnetic field.why?
Answer» A charged particle moving without acceleration produces an electricas well as a magnetic field.why?

Discussion

47.	Give the graph of kinetic energy versus acceleration and also their relation
Answer» Give the graph of kinetic energy versus acceleration and also their relation

Discussion

48.	In the expression k = Ae-Ea/RT the dimensions of A are
Answer» In the expression k = Ae^-Ea^/RT the dimensions of A are

Discussion

49.	Write the important characteristic features by which the interference can be distinguished from the observed diffraction pattern. OR Explain the basic differences between the construction and working of a telescope and a microscope.
Answer» Write the important characteristic features by which the interference can be distinguished from the observed diffraction pattern. OR Explain the basic differences between the construction and working of a telescope and a microscope.

49.

Write the important characteristic features by which the interference can be distinguished from the observed diffraction pattern. OR Explain the basic differences between the construction and working of a telescope and a microscope.

Answer»

Write the important characteristic features by which the interference can be distinguished from the observed diffraction pattern.

OR

Explain the basic differences between the construction and working of a telescope and a microscope.

Discussion

50.	Given below are some functions of x and t to represent the displacement (transverse or longitudinal) of an elastic wave. State which of these represent (i) a travelling wave, (ii) a stationary wave or (iii) none at all: (a) y = 2 cos (3x) sin (10t) (b) y = 2 x − υ t (c) y = 3 sin (5x – 0.5t) + 4 cos (5x – 0.5t) (d) y = cos x sin t + cos 2x sin 2t
Answer» Given below are some functions of x and t to represent the displacement (transverse or longitudinal) of an elastic wave. State which of these represent (i) a travelling wave, (ii) a stationary wave or (iii) none at all: (a) y = 2 cos (3x) sin (10t) (b) y = 2 x − υ t (c) y = 3 sin (5x – 0.5t) + 4 cos (5x – 0.5t) (d) y = cos x sin t + cos 2x sin 2t

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The energy released by the fission of one uranium atom is 200 MeV. The number of fissions per second required to produce 3.2 W of power is

there is one tower of height H . one particle A is projected upwards from top of the tower with a speed u1 at time t=0 . At time t=tnot another particle B is projected upwards from the bottom of the tower with the speed u2. when will the particles cross each other.

A dart is thrown horizontally with an initial speed of 10 m/s towards point P, the bull's eye on a dart board. It hits at the point Q on the rim, vertically below P, 0.2 seconds later, what is distance PQ?

suppose ideal gas follows an additional law V^2P^3 = cons†an t.Initial temperature and volume of gas are T and V respectively.If gas expands to 64V then its final temperature will become

Find the magnitude of work done by the field of a nucleus in π/5 of elliptical orbit of an electron?

The coefficient of volume expansion of glycerine is 49 × 10¯⁵ K¯¹. What is the fractional change in its density for a 30 °C rise in temperature ?

If the gravitational potential energy of two point masses infinitely away is taken to be zero then gravitational potential energy of a galaxy is (1) Zero (3) Negative (2) (4) Positive Can have any value

Position time graph of a body of mass 5 kg isgiven in the diagram. The impulse on body att = 3 s, is(u)x1812-1 2 34 5(s))(2) -30i kg m s(1) 30i kg m s-1-1(3) 6/ kg m s-1

A pulley (disc) of mass = 2kg and radius =10cm is attached with the block of mass m1= 4kg and m2=6kg with a light and stretchable string . The angular acceleration of the pulley is (assuming no slipping)

A metal ball of radius R has a charge Q and capacitance C.The charge is changed from q to 2q. The capacitance changes to

a train is passesan electric postin 10 s & a bridge of length 2km in110s.the speed of the engine ?

A 30 kW, 3-phase induction motor has full load slip of 3%, the stator losses amounts to 5% of the input and mechanical losses 1.5% of output. If the current in each rotor phase is 45 A, then the resistance per phase of the rotor is ________Ω.(Answer upto three decimal)0.155

{ (3) }8m/s} The velocity of a train increases at a constant rate }{f_1 from }0 to }v, then remains constant for an }} interval and finally decreases to zero at the }{ constant rate }f_2 . If }x be the total distance described }} then total time taken is

If the surface tension of a soap solution is 0.03 MKS units, then the excess of pressure inside a soap bubble of diameter 6 mm over the atmospheric pressure will be

How does the incident ray become parallel to the emergent ray if angle of incidence is equal to angle of emergence ?

The position of an object changes from r=(2i^+j^)m to r1 =(4i^+3j^)m. Find its avg. Velocity

Q. The load against elongation graph is plotted for 4 wires of same material then the thinest wire will be represented in graph will be?

The wavelength of maximum energy released during an atomic explosion was 2.93×10−10 m. Given that Wein's constant is 2.93×10−3 m−K, the maximum temperature attained must be of the order of

In the example of a perfectly rigid body, as the points are of same material then can we take another thing common in the points as mass?

A pendulum bob of mass 40 mg and carrying a charge of 2×10−8 C is at rest in a horizontal uniform electric field of 2×107 Vm−1. Calculate the tension in the thread of the pendulum and the angle it makes with the vertical.

A projectile is projected from the ground with a certain angle with horizontal.this projectile passes from two points (a,b) and (b,a), then find out range of this projectile

how to derive electric potential due to dipole by using cos rule

A ball thrown up vertically returns to the thrower after 8 s. The velocity with which it was thrown up is -

Two parallel glass plates are dipped partly in a liquid of density ′d′ keeping them vertical. If the distance between the plates is ′x′, surface tension for the liquid is T and angle of contact is θ, then rise of liquid between the plates due to capillary action will be:

A bullet of mass m moving at a velocity v hits a wooden block of mass M suspended by a string from rigid support. If the bullet gets embedded in the block, how high will the block rise,if the block was initially at rest?

6 Consider 3rd orbit of He\ast (Helium) using non-relativistic approach the speed of electron in thisorbit will be (given K 9 x 109 constant Z - 2 andh (Planck's constant) 6.6 x 10-34 Js)\lbrack AIPMT-2015\rbrack(1) 3.0 x 108 m/s(3) 1.46 x 106 m/s(2) 2.92 x 106 m/s(4) 0.73 x 106 m/s

Two resistors, R1 and R2 are connected in series. If the current through the resistor R1 is 2 A and the power dissipated in the resistor R2 is 10 W, then the value of resistance of the resistor R2 is

The voltage gain of an amplifer with 9% negative feedback is 10. The voltage gain without feedback will be

Which of the following options represents correct dimensions of ϵo?

prove that half of work done by battery get stored in inductor

What is the net force on a capacitor

A particle is projected with a velocity u, at an angle α, with the horizontal. Time at which its vertical component of velocity becomes half of its net speed at the highest point will be

Find electric field at a point p (1,2,4 )due to -2c at origin and 5c at (3,4,-1)?

find the electric potential at the point O due to segment of ring that make angle 60 degree at centre whose linear charge density is 4 C/m is ?

In an arrangement four particles, each of mass 2 gram are situated at the coordinate points (3, 2, 0), (1, -1, 0), (0, 0, 0) and (-1, -1, 0). The moment of inertia of this arrangement about the z-axis will be:

Two persons do the same amount of work. The first person does it in 10 s and the second person, in 20 s. Find the ratio of the power used by the first person to that by the second person.

the propelling force of a rocket increases uniformly from 0 to 5 Newton in the first 12 m and remains constant for the next 40 metre find the total work done?

What happens to an ideal gas when temperature is increases and the pressure is kept constant?

A charged particle moving without acceleration produces an electricas well as a magnetic field.why?

Give the graph of kinetic energy versus acceleration and also their relation

In the expression k = Ae-Ea/RT the dimensions of A are

Write the important characteristic features by which the interference can be distinguished from the observed diffraction pattern. OR Explain the basic differences between the construction and working of a telescope and a microscope.