16569 + Interview Questions in Physics

1.	What is the value of g in vacuum?
Answer» What is the value of g in vacuum?

Discussion

2.	1.Two similar equi-convex lenses, of focal length f each, are kept coaxially in contact with each other such that the focal length of the combination is F1. when the space between the two lenses is filled with glycerin (which has the same refractive index 1.5 as that of glass ) then the equivalent focal length is F2 .the ratio F1:F2 Will be? options a) 3:4 b) 2:1 c) 1:2 d) 2:3
Answer» 1.Two similar equi-convex lenses, of focal length f each, are kept coaxially in contact with each other such that the focal length of the combination is F1. when the space between the two lenses is filled with glycerin (which has the same refractive index 1.5 as that of glass ) then the equivalent focal length is F2 .the ratio F1:F2 Will be? options a) 3:4 b) 2:1 c) 1:2 d) 2:3

Discussion

3.	The minimum distance between a real object and screen such that a convex lens of focal length 20cm can produce a real image on the screen is1.202.403.804.60
Answer» The minimum distance between a real object and screen such that a convex lens of focal length 20cm can produce a real image on the screen is 1.20 2.40 3.80 4.60

Discussion

4.	If 100 volts of potential difference is applied between ′a′ and ′b′ in the circuit shown in the figure. The potential difference between 'c' and 'd' will be (Given Va>Vb).
Answer» If $100 volts$ of potential difference is applied between $^{'} a^{'}$ and $^{'} b^{'}$ in the circuit shown in the figure. The potential difference between ' $c$ ' and ' $d$ ' will be (Given $V_{a} > V_{b})$ .

Discussion

5.	A 4.5 CM needle is placed 12 centimetre away from a convex mirror of focal length 15 CM give the location of the image and magnification describe what happens to the needle as the needle is moved farther from the mirror
Answer» A 4.5 CM needle is placed 12 centimetre away from a convex mirror of focal length 15 CM give the location of the image and magnification describe what happens to the needle as the needle is moved farther from the mirror

Discussion

6.	On a bright sunny day, Shaunak was thinking why cannot we see upside down image of the sun?
Answer» On a bright sunny day, Shaunak was thinking why cannot we see upside down image of the sun?

6.

On a bright sunny day, Shaunak was thinking why cannot we see upside down image of the sun?

Answer»

On a bright sunny day, Shaunak was thinking why cannot we see upside down image of the sun?

Discussion

7.	Two army persons A and B each of weight 500 N climbs up a rope through a height of 10 m. A takes 20 sec, while B takes 40 sec to achieve this task. What is the ratio of powers of person A and B?
Answer» Two army persons A and B each of weight $500 N$ climbs up a rope through a height of 10 m. A takes 20 sec, while B takes 40 sec to achieve this task. What is the ratio of powers of person A and B?

Discussion

8.	Question 1A person cannot see distinctly objects kept beyond 2 m. This defect can be corrected by using a lens of power(a) + 0.5 D(b) – 0.5 D(c) + 0.2 D(d) – 0.2 D
Answer» Question 1 A person cannot see distinctly objects kept beyond 2 m. This defect can be corrected by using a lens of power (a) + 0.5 D (b) – 0.5 D (c) + 0.2 D (d) – 0.2 D

Discussion

9.	Why are voltometor placed parallel with the the resistor (fixed)
Answer» Why are voltometor placed parallel with the the resistor (fixed)

Discussion

10.	Consider the following statement:1. p - orbital can accommodate maximum of two electrons.2. d - subshell has five orbitals.3. Energy of electron decreases as it goes away from nucleus in an atom.Choose the correct statements.(1.) 1. & 2. (2.) 2. & 3.(3.) 1. & 3. (4.) 1., 2. & 3.
Answer» Consider the following statement: 1. p - orbital can accommodate maximum of two electrons. 2. d - subshell has five orbitals. 3. Energy of electron decreases as it goes away from nucleus in an atom. Choose the correct statements. (1.) 1. & 2. (2.) 2. & 3. (3.) 1. & 3. (4.) 1., 2. & 3.

Discussion

11.	1. Explain the shining of an air bubble in water. 2. A convex lens forms an image of the same size as the object at a distance of 30 cm from the lens. What is the distance of the object from the lens? [5 MARKS]
Answer» 1. Explain the shining of an air bubble in water. 2. A convex lens forms an image of the same size as the object at a distance of 30 cm from the lens. What is the distance of the object from the lens? [5 MARKS]

Discussion

12.	Correct statement/s regarding micelle is/are I.emulsified grease is washed away with solution II.soap anions form spontaneously the micelle III.micelle is an associated colloid IV.stearate micelle constitute a non-ionic micelle
Answer» Correct statement/s regarding micelle is/are I.emulsified grease is washed away with solution II.soap anions form spontaneously the micelle III.micelle is an associated colloid IV.stearate micelle constitute a non-ionic micelle

12.

Correct statement/s regarding micelle is/are I.emulsified grease is washed away with solution II.soap anions form spontaneously the micelle III.micelle is an associated colloid IV.stearate micelle constitute a non-ionic micelle

Answer»

Correct statement/s regarding micelle is/are
I.emulsified grease is washed away with solution
II.soap anions form spontaneously the micelle
III.micelle is an associated colloid

IV.stearate micelle constitute a non-ionic micelle

Discussion

13.	A power system has a circuit breaker connecting a large system, (initially open) to other system between bus 2 and bus 3. The system B three-phase fault level at bus 3 under the condition is unknown. After closing circuit breaker, the 3−ϕ fault level at bus 1 was found to be 6 pu. The new 3−ϕ fault level at system bus 3 after interconnection will be _______pu.(Assume prefault voltages to be 1 pu at all buses).7.71
Answer» A power system has a circuit breaker connecting a large system, (initially open) to other system between bus 2 and bus 3. The system B three-phase fault level at bus 3 under the condition is unknown. After closing circuit breaker, the 3 $- ϕ$ fault level at bus 1 was found to be 6 pu. The new 3 $- ϕ$ fault level at system bus 3 after interconnection will be _______pu.(Assume prefault voltages to be 1 pu at all buses). 7.71

Discussion

14.	Identify the power source in the circuit.
Answer» Identify the power source in the circuit.

Discussion

15.	Where is the image formed when the object is at the near point of the eye?
Answer» Where is the image formed when the object is at the near point of the eye?

Discussion

16.	Why does blue light travel the shortest distance and red the longest distance?
Answer» Why does blue light travel the shortest distance and red the longest distance?

Discussion

17.	a parallel beam of monochromatic light ofwavelength 5000 A is inCident normally on a narrow slit of width of 0.001 mm. The light is focussed by Convex lens on a screen placed on focal plane.The central maxima is formed in the angular width of (1) 30^° (2) 60^° (3) 45^° (4)90^°
Answer» a parallel beam of monochromatic light ofwavelength 5000 A is inCident normally on a narrow slit of width of 0.001 mm. The light is focussed by Convex lens on a screen placed on focal plane.The central maxima is formed in the angular width of (1) 30^° (2) 60^° (3) 45^° (4)90^°

Discussion

18.	Who introduced. Right hand thumb rule? Is there any other name for it
Answer» Who introduced. Right hand thumb rule? Is there any other name for it

Discussion

19.	How to find the direction of magnetic field from a curved magnetic field lines i.e non uniform magnetic field
Answer» How to find the direction of magnetic field from a curved magnetic field lines i.e non uniform magnetic field

Discussion

20.	Please explain the Clock Face Rule.
Answer» Please explain the Clock Face Rule.

Discussion

21.	With what velocity an observer should move relative to a stationary source so that he hears a sound of double the frequency of source
Answer» With what velocity an observer should move relative to a stationary source so that he hears a sound of double the frequency of source

Discussion

22.	a vessel has 6 g of oxygen at a pressure P and temperature 400 K. A small hole is made in it so that O2 leaks out. How much O2 leaks out if the pressure is P/2 and temperature 300K
Answer» a vessel has 6 g of oxygen at a pressure P and temperature 400 K. A small hole is made in it so that O2 leaks out. How much O2 leaks out if the pressure is P/2 and temperature 300K

Discussion

23.	What are ohmic and non-ohmic conductors. Draw V-I graph for both the coductors.
Answer» What are ohmic and non-ohmic conductors. Draw V-I graph for both the coductors.

Discussion

24.	Write a short note on the importance of water and the effect of human intervention on water sources. [3 MARKS]
Answer» Write a short note on the importance of water and the effect of human intervention on water sources. [3 MARKS]

Discussion

25.	If a few drops of milk are added in the experiment given the reddish colour seen from the front becomes an intense red. However, if many more drops are added the reddish colour is not seen. Why is this so?
Answer» If a few drops of milk are added in the experiment given the reddish colour seen from the front becomes an intense red. However, if many more drops are added the reddish colour is not seen. Why is this so?

Discussion

26.	During summer, water kept in an earthen pot becomes cool because of which phenomenon?
Answer» During summer, water kept in an earthen pot becomes cool because of which phenomenon?

Discussion

27.	A block of certain mass is sliding on a smooth floor with a certain velocity. The work required to stop it is
Answer» A block of certain mass is sliding on a smooth floor with a certain velocity. The work required to stop it is

Discussion

28.	three particles each of mass m are placed at the vertices of an equilateral triangle of side a . the gravitational field intensity at the centroid of the triangle u
Answer» three particles each of mass m are placed at the vertices of an equilateral triangle of side a . the gravitational field intensity at the centroid of the triangle u

Discussion

29.	35. an isosceles prism has angle 30 , has one of its surface silvered light is falling at 60 degree on other surface retrace thier path .what is refractive index of prism material
Answer» 35. an isosceles prism has angle 30 , has one of its surface silvered light is falling at 60 degree on other surface retrace thier path .what is refractive index of prism material

Discussion

30.	Where i will go if i dig a tunnel through the earth's centre and jump into it....?(visualizing there is no core and mantle)
Answer» Where i will go if i dig a tunnel through the earth's centre and jump into it....?(visualizing there is no core and mantle)

Discussion

31.	A compass needle oscillates 20 times per minute at a place where dip is 45∘ and 30 times per minute where dip is 30∘. The ratio of horizontal component of earth's magnetic at second to first place is-
Answer» A compass needle oscillates $20$ times per minute at a place where dip is $45^{\circ}$ and $30$ times per minute where dip is $30^{\circ}$ . The ratio of horizontal component of earth's magnetic at second to first place is-

Discussion

32.	What do you mean by cryogenics?
Answer» What do you mean by cryogenics?

Discussion

33.	If R is the radius of curvature of a spherical mirror and f is its focal length, then : (a) R = f (b) R=2f (c) R=f2 (d) R=3f
Answer» If R is the radius of curvature of a spherical mirror and f is its focal length, then : (a) R = f (b) R=2f (c) R= $\frac{f}{2}$ (d) R=3f

Discussion

34.	how much water would be filled in a container of height 21 cm so that it appears half filled to the observer when viewed from the top of the container. Given refrative index of water is 4/
Answer» how much water would be filled in a container of height 21 cm so that it appears half filled to the observer when viewed from the top of the container. Given refrative index of water is 4/

Discussion

35.	what is the electric potential at the center of a hemisphere of radius R and having surface charge density p??explain each step
Answer» what is the electric potential at the center of a hemisphere of radius R and having surface charge density p??explain each step

Discussion

36.	What is the difference btw induction and electrical motor
Answer» What is the difference btw induction and electrical motor

Discussion

37.	A system is decribed by the following state and output equations:dx1(t)dt=−3x1(t)+x2(t)+2u(t)dx1(t)dt=−2x2(t)+u(t)y(t) = x1(t)when u(t) is the input and y(t) is the output.The state-trasition matrix of the above system is
Answer» A system is decribed by the following state and output equations: $\frac{d x_{1} (t)}{d t} = - 3 x_{1} (t) + x_{2} (t) + 2 u (t)$ $\frac{d x_{1} (t)}{d t} = - 2 x_{2} (t) + u (t)$ y(t) = $x_{1}$ (t) when u(t) is the input and y(t) is the output. The state-trasition matrix of the above system is

Discussion

38.	State the condition for the resonance to occur.
Answer» State the condition for the resonance to occur.

Discussion

39.	The relation between intensity (I) of image formed by a spherical mirror and area of aperture (A) is ??it is given Intensity is directly proportinal to area of aperture shouldn't it be that intensity is directly proportional to ( aperture )^2
Answer» The relation between intensity (I) of image formed by a spherical mirror and area of aperture (A) is ?? it is given Intensity is directly proportinal to area of aperture shouldn't it be that intensity is directly proportional to ( aperture )^2

Discussion

40.	Does incident ray and refracted ray cross each other?
Answer» Does incident ray and refracted ray cross each other?

Discussion

41.	Which of the following resistor arrangement, A or B, has the lower combined resistance?
Answer» Which of the following resistor arrangement, A or B, has the lower combined resistance?

Discussion

42.	Which law is in control of a spacecraft that cruises through space at a constant speed without using any fuel?
Answer» Which law is in control of a spacecraft that cruises through space at a constant speed without using any fuel?

Discussion

43.	a body is projrcted vertically upward with velocity 30m/s the dis†an ce travelled by the body in 3rd second is
Answer» a body is projrcted vertically upward with velocity 30m/s the dis†an ce travelled by the body in 3rd second is

Discussion

44.	3 sound waves of equal amplitudes have frequencies f-1 , f+2 , f+4. They superimpose to give beats. The number of beats produced per second will be?
Answer» 3 sound waves of equal amplitudes have frequencies f-1 , f+2 , f+4. They superimpose to give beats. The number of beats produced per second will be?

Discussion

45.	A car has a mass of 1000 kg and kinetic energy of 129600 J. The driver of the car applies the brake when he suddenly sees an obstacle. The car comes to a halt after travelling 100 m distance without meeting with an accident. Calculate the frictional force.
Answer» A car has a mass of 1000 kg and kinetic energy of 129600 J. The driver of the car applies the brake when he suddenly sees an obstacle. The car comes to a halt after travelling 100 m distance without meeting with an accident. Calculate the frictional force.

Discussion

46.	What do you understand by the statement ‘the refractive index of glass is 1.5 for white light?
Answer» What do you understand by the statement ‘the refractive index of glass is 1.5 for white light?

Discussion

47.	An object is placed at 60 m in front of a concave mirror. If its radius of curvature is 40 m, then find the image distance.
Answer» An object is placed at $60 m$ in front of a concave mirror. If its radius of curvature is $40 m$ , then find the image distance.

Discussion

48.	54. In the melting of ice which one of the conditions will be more favorable about temperature and pressure
Answer» 54. In the melting of ice which one of the conditions will be more favorable about temperature and pressure

Discussion

49.	two pipes running together can fill a cistern in 10/3 minutes if one pipe takes 3 mins more than the other to fill it , find the time taken by each pipe to fill the cistern
Answer» two pipes running together can fill a cistern in 10/3 minutes if one pipe takes 3 mins more than the other to fill it , find the time taken by each pipe to fill the cistern

Discussion

50.	A machine gun fires a bullet of mass 65 g withvelocity of 1300 m/s. The man holding it can exerta maximum force of 169 N on the gun. Thenumber of bullets he can fire per second will be
Answer» A machine gun fires a bullet of mass 65 g withvelocity of 1300 m/s. The man holding it can exerta maximum force of 169 N on the gun. Thenumber of bullets he can fire per second will be

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is the value of g in vacuum?

The minimum distance between a real object and screen such that a convex lens of focal length 20cm can produce a real image on the screen is1.202.403.804.60

If 100 volts of potential difference is applied between ′a′ and ′b′ in the circuit shown in the figure. The potential difference between 'c' and 'd' will be (Given Va&gt;Vb).

A 4.5 CM needle is placed 12 centimetre away from a convex mirror of focal length 15 CM give the location of the image and magnification describe what happens to the needle as the needle is moved farther from the mirror

On a bright sunny day, Shaunak was thinking why cannot we see upside down image of the sun?

Two army persons A and B each of weight 500 N climbs up a rope through a height of 10 m. A takes 20 sec, while B takes 40 sec to achieve this task. What is the ratio of powers of person A and B?

Question 1A person cannot see distinctly objects kept beyond 2 m. This defect can be corrected by using a lens of power(a) + 0.5 D(b) – 0.5 D(c) + 0.2 D(d) – 0.2 D

Why are voltometor placed parallel with the the resistor (fixed)

Consider the following statement:1. p - orbital can accommodate maximum of two electrons.2. d - subshell has five orbitals.3. Energy of electron decreases as it goes away from nucleus in an atom.Choose the correct statements.(1.) 1. & 2. (2.) 2. & 3.(3.) 1. & 3. (4.) 1., 2. & 3.

1. Explain the shining of an air bubble in water. 2. A convex lens forms an image of the same size as the object at a distance of 30 cm from the lens. What is the distance of the object from the lens? [5 MARKS]

Correct statement/s regarding micelle is/are I.emulsified grease is washed away with solution II.soap anions form spontaneously the micelle III.micelle is an associated colloid IV.stearate micelle constitute a non-ionic micelle

Identify the power source in the circuit.

Where is the image formed when the object is at the near point of the eye?

Why does blue light travel the shortest distance and red the longest distance?

a parallel beam of monochromatic light ofwavelength 5000 A is inCident normally on a narrow slit of width of 0.001 mm. The light is focussed by Convex lens on a screen placed on focal plane.The central maxima is formed in the angular width of (1) 30^° (2) 60^° (3) 45^° (4)90^°

Who introduced. Right hand thumb rule? Is there any other name for it

How to find the direction of magnetic field from a curved magnetic field lines i.e non uniform magnetic field

Please explain the Clock Face Rule.

With what velocity an observer should move relative to a stationary source so that he hears a sound of double the frequency of source

a vessel has 6 g of oxygen at a pressure P and temperature 400 K. A small hole is made in it so that O2 leaks out. How much O2 leaks out if the pressure is P/2 and temperature 300K

What are ohmic and non-ohmic conductors. Draw V-I graph for both the coductors.

Write a short note on the importance of water and the effect of human intervention on water sources. [3 MARKS]

If a few drops of milk are added in the experiment given the reddish colour seen from the front becomes an intense red. However, if many more drops are added the reddish colour is not seen. Why is this so?

During summer, water kept in an earthen pot becomes cool because of which phenomenon?

A block of certain mass is sliding on a smooth floor with a certain velocity. The work required to stop it is

three particles each of mass m are placed at the vertices of an equilateral triangle of side a . the gravitational field intensity at the centroid of the triangle u

35. an isosceles prism has angle 30 , has one of its surface silvered light is falling at 60 degree on other surface retrace thier path .what is refractive index of prism material

Where i will go if i dig a tunnel through the earth's centre and jump into it....?(visualizing there is no core and mantle)

A compass needle oscillates 20 times per minute at a place where dip is 45∘ and 30 times per minute where dip is 30∘. The ratio of horizontal component of earth's magnetic at second to first place is-

What do you mean by cryogenics?

If R is the radius of curvature of a spherical mirror and f is its focal length, then : (a) R = f (b) R=2f (c) R=f2 (d) R=3f

how much water would be filled in a container of height 21 cm so that it appears half filled to the observer when viewed from the top of the container. Given refrative index of water is 4/

what is the electric potential at the center of a hemisphere of radius R and having surface charge density p??explain each step

What is the difference btw induction and electrical motor

A system is decribed by the following state and output equations:dx1(t)dt=−3x1(t)+x2(t)+2u(t)dx1(t)dt=−2x2(t)+u(t)y(t) = x1(t)when u(t) is the input and y(t) is the output.The state-trasition matrix of the above system is

State the condition for the resonance to occur.

The relation between intensity (I) of image formed by a spherical mirror and area of aperture (A) is ??it is given Intensity is directly proportinal to area of aperture shouldn't it be that intensity is directly proportional to ( aperture )^2

Does incident ray and refracted ray cross each other?

Which of the following resistor arrangement, A or B, has the lower combined resistance?

Which law is in control of a spacecraft that cruises through space at a constant speed without using any fuel?

a body is projrcted vertically upward with velocity 30m/s the dis†an ce travelled by the body in 3rd second is

3 sound waves of equal amplitudes have frequencies f-1 , f+2 , f+4. They superimpose to give beats. The number of beats produced per second will be?

A car has a mass of 1000 kg and kinetic energy of 129600 J. The driver of the car applies the brake when he suddenly sees an obstacle. The car comes to a halt after travelling 100 m distance without meeting with an accident. Calculate the frictional force.

What do you understand by the statement ‘the refractive index of glass is 1.5 for white light?

An object is placed at 60 m in front of a concave mirror. If its radius of curvature is 40 m, then find the image distance.

54. In the melting of ice which one of the conditions will be more favorable about temperature and pressure

two pipes running together can fill a cistern in 10/3 minutes if one pipe takes 3 mins more than the other to fill it , find the time taken by each pipe to fill the cistern

A machine gun fires a bullet of mass 65 g withvelocity of 1300 m/s. The man holding it can exerta maximum force of 169 N on the gun. Thenumber of bullets he can fire per second will be

If 100 volts of potential difference is applied between ′a′ and ′b′ in the circuit shown in the figure. The potential difference between 'c' and 'd' will be (Given Va>Vb).