16569 + Interview Questions in Physics

1.	Choose the most appropriate option.
Answer» Choose the most appropriate option.

Discussion

2.	33.in the following network it is proposed to connect a load of resistance of 2 ohm in parallel with 10 ohm resistance . By using Thevenin's theorem , determine the current that would flow through 2 ohm resistance.
Answer» 33.in the following network it is proposed to connect a load of resistance of 2 ohm in parallel with 10 ohm resistance . By using Thevenin's theorem , determine the current that would flow through 2 ohm resistance.

Discussion

3.	Which device is used to produce electricity? Describe with a neat diagram.a. Electric motorb. Galvanometerc. Electric Generator (DC)d. Voltmeter
Answer» Which device is used to produce electricity? Describe with a neat diagram. a. Electric motor b. Galvanometer c. Electric Generator (DC) d. Voltmeter

Discussion

4.	a charged particle is enters a magnetic field at right angles to magnetic field. The field exists for a length equal to 1.5 timesthe radius of circular path of particle. THE PARTICLE WILL BE DEVIATED FROM ITS PATH BY ANGLE?
Answer» a charged particle is enters a magnetic field at right angles to magnetic field. The field exists for a length equal to 1.5 timesthe radius of circular path of particle. THE PARTICLE WILL BE DEVIATED FROM ITS PATH BY ANGLE?

Discussion

5.	A plank P is placed on a solid cylinder S, which rolls on a horizontal surface. The two are of equal mass. There is no slipping at any of the surfaces in contact. The ratio of kinetic energy of P to the kinetic energy of S is:
Answer» A plank P is placed on a solid cylinder S, which rolls on a horizontal surface. The two are of equal mass. There is no slipping at any of the surfaces in contact. The ratio of kinetic energy of P to the kinetic energy of S is:

5.

A plank P is placed on a solid cylinder S, which rolls on a horizontal surface. The two are of equal mass. There is no slipping at any of the surfaces in contact. The ratio of kinetic energy of P to the kinetic energy of S is:

Answer»

A plank P is placed on a solid cylinder S, which rolls on a horizontal surface. The two are of equal mass. There is no slipping at any of the surfaces in contact. The ratio of kinetic energy of P to the kinetic energy of S is:

Discussion

6.	how to solve the integration which is under mod function??
Answer» how to solve the integration which is under mod function??

Discussion

7.	When the mirror is being described as being 'unmisted by love or dislike' we understand that the mirror is i. not misted ii. not prejudiced iii. has four angles iv. silver in colour
Answer» When the mirror is being described as being 'unmisted by love or dislike' we understand that the mirror is i. not misted ii. not prejudiced iii. has four angles iv. silver in colour

7.

When the mirror is being described as being 'unmisted by love or dislike' we understand that the mirror is i. not misted ii. not prejudiced iii. has four angles iv. silver in colour

Answer»

When the mirror is
being described as being 'unmisted by love or dislike' we understand
that the mirror is

i.
not misted

ii.
not prejudiced

iii.
has four angles

iv.
silver in colour

Discussion

8.	(a) Draw a labelled ray diagram to show the formation of image of an object by a convex mirror. Mark clearly the pole, focus and centre of curvature on the diagram. (b) What happens to the image when the object is moved away from the mirror gradually ? (c) State three characteristics of the image formed by a convex mirror.
Answer» (a) Draw a labelled ray diagram to show the formation of image of an object by a convex mirror. Mark clearly the pole, focus and centre of curvature on the diagram. (b) What happens to the image when the object is moved away from the mirror gradually ? (c) State three characteristics of the image formed by a convex mirror.

Discussion

9.	A cube of edge 6 cm is placed over a printed page. at what distance from the top surface will the letters appear when seen from above? Refractive index of glass 1.5
Answer» A cube of edge 6 cm is placed over a printed page. at what distance from the top surface will the letters appear when seen from above? Refractive index of glass 1.5

Discussion

10.	If E, and E2 be the respective electric fields atthe equatorial point and axial point of an electricdipole (at same distances from the dipole) then1 2
Answer» If E, and E2 be the respective electric fields atthe equatorial point and axial point of an electricdipole (at same distances from the dipole) then1 2

Discussion

11.	A student performs an experiment on finding the focal length of a convex lens by keeping a lighted candle on one end of laboratory table, a screen on its other end and the lens between them as shown in the figure. The positions of the three are adjusted to get a sharp image of the candle flame on the screen.If now the candle flame were to be replaced by a distant lamp on a far away electric pole, the student would be able to get a sharp image of this distant lamp on the screen by moving:(1) The screen in the direction of the lens or the lens in the direction of the screen(2) the screen in the direction of the lens or the lens away from the screen(3) the screen away from the lens or the lens in the direction of the screen(4) neither the screen nor the lens
Answer» A student performs an experiment on finding the focal length of a convex lens by keeping a lighted candle on one end of laboratory table, a screen on its other end and the lens between them as shown in the figure. The positions of the three are adjusted to get a sharp image of the candle flame on the screen. If now the candle flame were to be replaced by a distant lamp on a far away electric pole, the student would be able to get a sharp image of this distant lamp on the screen by moving: (1) The screen in the direction of the lens or the lens in the direction of the screen (2) the screen in the direction of the lens or the lens away from the screen (3) the screen away from the lens or the lens in the direction of the screen (4) neither the screen nor the lens

Discussion

12.	what are the different parts of a solar cooker? expain their functions.
Answer» what are the different parts of a solar cooker? expain their functions.

Discussion

13.	What change should be made in an AC . generator so that it may become a DC. generator ?
Answer» What change should be made in an AC . generator so that it may become a DC. generator ?

Discussion

14.	At what depth below the earth's surface, the acceleration due to gravity will be half the value of g on the earth's surface? (R is the radius of earth
Answer» At what depth below the earth's surface, the acceleration due to gravity will be half the value of g on the earth's surface? (R is the radius of earth

Discussion

15.	Why is the solar cooker box covered with a plane glass plate?
Answer» Why is the solar cooker box covered with a plane glass plate?

Discussion

16.	Where must the object be placed for the image formed by a converging lens to be : (a) real, inverted and smaller than the object ? (b) real, inverted and same size as the object ? (c) real, inverted and larger than the object ? (d) virtual, upright and larger than the object ?
Answer» Where must the object be placed for the image formed by a converging lens to be : (a) real, inverted and smaller than the object ? (b) real, inverted and same size as the object ? (c) real, inverted and larger than the object ? (d) virtual, upright and larger than the object ?

Discussion

17.	During a practice match, a softball pitcher threw a ball. The height of the throw can be modelled by the equation h=−16t2+24t+1, where h = height in feet and t = time in seconds. How long does it take for the ball to reach a height of 6 feet for the first time?
Answer» During a practice match, a softball pitcher threw a ball. The height of the throw can be modelled by the equation $h = - 16 t^{2} + 24 t + 1$ , where h = height in feet and t = time in seconds. How long does it take for the ball to reach a height of 6 feet for the first time?

Discussion

18.	A wire 88 cm long bent into a circular loop is placed perpendicular to the magnetic field of flux density 2.5 Wb/m2. Within 0.5 sec, the loop is changed into a square of each side 22 cm and flux density is increased to 3 Wb/m2. Calculate the value of e.m.f induced??
Answer» A wire 88 cm long bent into a circular loop is placed perpendicular to the magnetic field of flux density 2.5 Wb/m2. Within 0.5 sec, the loop is changed into a square of each side 22 cm and flux density is increased to 3 Wb/m2. Calculate the value of e.m.f induced??

Discussion

19.	A fan of power 550 W works for 3 hours. Calculate the energy consumed.
Answer» A fan of power $550 W$ works for $3 h o u r s$ . Calculate the energy consumed.

Discussion

20.	21.A cell with N/50 KCl solution showed a resistance of 550 ohm at 25 degree celcius. The specific conductivity of N/50 KCl at 25 degree celsius is 0.002768 ohm/cm. The cell filled with N/10 ZnSO4 solution at 25 degree celsius shows a resistance of 72.18 ohms. Find the cell constant and molar conductivity of ZnSO4 solution.
Answer» 21.A cell with N/50 KCl solution showed a resistance of 550 ohm at 25 degree celcius. The specific conductivity of N/50 KCl at 25 degree celsius is 0.002768 ohm/cm. The cell filled with N/10 ZnSO4 solution at 25 degree celsius shows a resistance of 72.18 ohms. Find the cell constant and molar conductivity of ZnSO4 solution.

Discussion

21.	Two lamps, one rated 100 W at 220 V, and the other 60 W at 220 V, are connected in parallel to an electric mains supply. What current is drawn from the line if the supply voltage is 220 V?
Answer» Two lamps, one rated 100 W at 220 V, and the other 60 W at 220 V, are connected in parallel to an electric mains supply. What current is drawn from the line if the supply voltage is 220 V?

Discussion

22.	the graph of energy of a pendulam oscillating in ai
Answer» the graph of energy of a pendulam oscillating in ai

Discussion

23.	If the V-I graph of an electric circuit passess through the points (y1,x1) and (y2,x2), what will be the resistance of the circuit?
Answer» If the V-I graph of an electric circuit passess through the points ( $y_{1}$ , $x_{1}$ ) and ( $y_{2}$ , $x_{2}$ ), what will be the resistance of the circuit?

Discussion

24.	Why is a concave mirror called converging mirror and convex mirror called diverging mirror?
Answer» Why is a concave mirror called converging mirror and convex mirror called diverging mirror?

Discussion

25.	Convert the following 1) electron volt to joule 2) joule to electron volt 3) Armstrong to meters 4 ) electron volt to meters
Answer» Convert the following 1) electron volt to joule 2) joule to electron volt 3) Armstrong to meters 4 ) electron volt to meters

Discussion

26.	The three diagrams in the following figure show the lines of force (field lines) between the poles of two magnets. Identify the poles A,B,C,D,E and F.
Answer» The three diagrams in the following figure show the lines of force (field lines) between the poles of two magnets. Identify the poles A,B,C,D,E and F.

26.

The three diagrams in the following figure show the lines of force (field lines) between the poles of two magnets. Identify the poles A,B,C,D,E and F.

Answer»

The three diagrams in the following figure show the lines of force (field lines) between the poles of two magnets. Identify the poles A,B,C,D,E and F.

Discussion

27.	What is the diameter of an eyes?
Answer» What is the diameter of an eyes?

Discussion

28.	A kite is flying, attached to a thread which is 165m long. The thread makes an angle of 300 with the ground. The height of the kite from the ground, assuming that there is no slack in the thread is
Answer» A kite is flying, attached to a thread which is 165m long. The thread makes an angle of 30⁰ with the ground. The height of the kite from the ground, assuming that there is no slack in the thread is

Discussion

29.	Consider a short dipole. Let a be the electric field at a distance r from the axis, on the axial line. Let b be the electric field at a point at a distance r from the dipole measured along a line making angle with the dipole moment. If a is perpendicular to b then ( \|a\| / \| b\|) = n tan. Find n.
Answer» Consider a short dipole. Let a be the electric field at a distance r from the axis, on the axial line. Let b be the electric field at a point at a distance r from the dipole measured along a line making angle with the dipole moment. If a is perpendicular to b then ( \|a\| / \| b\|) = n tan. Find n.

Discussion

30.	The current produced by a generator with slip rings will have which of the following variations with time?
Answer» The current produced by a generator with slip rings will have which of the following variations with time?

Discussion

31.	23. For the methane -oxygen fuel cell if standard free energy change is -965KJ/mol what will be standard cell emf?
Answer» 23. For the methane -oxygen fuel cell if standard free energy change is -965KJ/mol what will be standard cell emf?

Discussion

32.	What is central force in easy words?
Answer» What is central force in easy words?

Discussion

33.	If v = speed, f = frequency, λ = wavelength and T = time period, then which of the following expression(s) is/are correct?
Answer» If v = speed, f = frequency, $λ$ = wavelength and T = time period, then which of the following expression(s) is/are correct?

Discussion

34.	What is the role of the split ring in an electric motor?
Answer» What is the role of the split ring in an electric motor?

Discussion

35.	Is total energy of simple harmonic motion dependent or independent of mass?
Answer» Is total energy of simple harmonic motion dependent or independent of mass?

Discussion

36.	By saying 'Now I am a lake' the narrator wants to show that i. the poem is not only about external beauty but also the inside of a person ii. the lake can also reflect surfaces iii. the depth of the lake is important iv. the lake does not show as exact an image as a mirror
Answer» By saying 'Now I am a lake' the narrator wants to show that i. the poem is not only about external beauty but also the inside of a person ii. the lake can also reflect surfaces iii. the depth of the lake is important iv. the lake does not show as exact an image as a mirror

36.

By saying 'Now I am a lake' the narrator wants to show that i. the poem is not only about external beauty but also the inside of a person ii. the lake can also reflect surfaces iii. the depth of the lake is important iv. the lake does not show as exact an image as a mirror

Answer»

By saying 'Now
I am a lake' the
narrator wants to show that

i.
the poem is not only about external beauty but also the inside of a
person

ii.
the lake can also reflect surfaces

iii.
the depth of the lake is important

iv.
the lake does not show as exact an image as a mirror

Discussion

37.	The equivalent resistance between A and B
Answer» The equivalent resistance between A and B

Discussion

38.	If a ray passing through the focus gets refracted by a convex lens, where will it intersect the principal axis?
Answer» If a ray passing through the focus gets refracted by a convex lens, where will it intersect the principal axis?

Discussion

39.	what is power of accomodation ?
Answer» what is power of accomodation ?

Discussion

40.	As light rays travel from air into a glass prism, they:
Answer» As light rays travel from air into a glass prism, they:

Discussion

41.	Question 21Why does a light ray incident on a rectangular glass slab immersed in any medium emerges parallel to itself? Explain using a diagram.
Answer» Question 21 Why does a light ray incident on a rectangular glass slab immersed in any medium emerges parallel to itself? Explain using a diagram.

Discussion

42.	Two wires are kept tight between the same pair of supports.The tensions in the wires ar in the ratio 2:1,the radii are in the ratio 3:1 and densities are in the ratio 1:2 .Ratio of their fundamental frequencies is?
Answer» Two wires are kept tight between the same pair of supports.The tensions in the wires ar in the ratio 2:1,the radii are in the ratio 3:1 and densities are in the ratio 1:2 .Ratio of their fundamental frequencies is?

Discussion

43.	if 2 ampere current flows in a uniform conductor which has 1 into 10 to the power 24 electrons per metre what is the average velocity
Answer» if 2 ampere current flows in a uniform conductor which has 1 into 10 to the power 24 electrons per metre what is the average velocity

Discussion

44.	an ideal monoatomic gas is allowed to expand adiabatically so that its pressure and temperature are related as P=cT^x
Answer» an ideal monoatomic gas is allowed to expand adiabatically so that its pressure and temperature are related as P=cT^x

Discussion

45.	The value of g at a certain height h above the free surface of earth is x/4 , where x is the value of g at the surface of earth. The height h is
Answer» The value of g at a certain height h above the free surface of earth is x/4 , where x is the value of g at the surface of earth. The height h is

Discussion

46.	6 A lens is cut into two equal halves (i) along the principal axis (i) perpendicular to principal axis. What will be the focallength of each half?
Answer» 6 A lens is cut into two equal halves (i) along the principal axis (i) perpendicular to principal axis. What will be the focallength of each half?

Discussion

47.	Why do we have two eyes and not just one?
Answer» Why do we have two eyes and not just one?

Discussion

48.	Why lense refract light?
Answer» Why lense refract light?

Discussion

49.	A projectile can have the same range 'R' for twoangles of projection. If t, and t, be the times offlight in the two cases, then the initial velocity ofprojectile is
Answer» A projectile can have the same range 'R' for twoangles of projection. If t, and t, be the times offlight in the two cases, then the initial velocity ofprojectile is

Discussion

50.	Question 15You are given water, mustard oil, glycerine and kerosene. In which of these media a ray of light incident obliquely at same angle would bend the most?(a) Kerosene(b) Water(c) Mustard oil(d) Glycerine
Answer» Question 15 You are given water, mustard oil, glycerine and kerosene. In which of these media a ray of light incident obliquely at same angle would bend the most? (a) Kerosene (b) Water (c) Mustard oil (d) Glycerine

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Choose the most appropriate option.

33.in the following network it is proposed to connect a load of resistance of 2 ohm in parallel with 10 ohm resistance . By using Thevenin's theorem , determine the current that would flow through 2 ohm resistance.

Which device is used to produce electricity? Describe with a neat diagram.a. Electric motorb. Galvanometerc. Electric Generator (DC)d. Voltmeter

a charged particle is enters a magnetic field at right angles to magnetic field. The field exists for a length equal to 1.5 timesthe radius of circular path of particle. THE PARTICLE WILL BE DEVIATED FROM ITS PATH BY ANGLE?

A plank P is placed on a solid cylinder S, which rolls on a horizontal surface. The two are of equal mass. There is no slipping at any of the surfaces in contact. The ratio of kinetic energy of P to the kinetic energy of S is:

how to solve the integration which is under mod function??

When the mirror is being described as being 'unmisted by love or dislike' we understand that the mirror is i. not misted ii. not prejudiced iii. has four angles iv. silver in colour

A cube of edge 6 cm is placed over a printed page. at what distance from the top surface will the letters appear when seen from above? Refractive index of glass 1.5

If E, and E2 be the respective electric fields atthe equatorial point and axial point of an electricdipole (at same distances from the dipole) then1 2

what are the different parts of a solar cooker? expain their functions.

What change should be made in an AC . generator so that it may become a DC. generator ?

At what depth below the earth's surface, the acceleration due to gravity will be half the value of g on the earth's surface? (R is the radius of earth

Why is the solar cooker box covered with a plane glass plate?

Where must the object be placed for the image formed by a converging lens to be : (a) real, inverted and smaller than the object ? (b) real, inverted and same size as the object ? (c) real, inverted and larger than the object ? (d) virtual, upright and larger than the object ?

During a practice match, a softball pitcher threw a ball. The height of the throw can be modelled by the equation h=−16t2+24t+1, where h = height in feet and t = time in seconds. How long does it take for the ball to reach a height of 6 feet for the first time?

A wire 88 cm long bent into a circular loop is placed perpendicular to the magnetic field of flux density 2.5 Wb/m2. Within 0.5 sec, the loop is changed into a square of each side 22 cm and flux density is increased to 3 Wb/m2. Calculate the value of e.m.f induced??

A fan of power 550 W works for 3 hours. Calculate the energy consumed.

Two lamps, one rated 100 W at 220 V, and the other 60 W at 220 V, are connected in parallel to an electric mains supply. What current is drawn from the line if the supply voltage is 220 V?

the graph of energy of a pendulam oscillating in ai

If the V-I graph of an electric circuit passess through the points (y1,x1) and (y2,x2), what will be the resistance of the circuit?

Why is a concave mirror called converging mirror and convex mirror called diverging mirror?

Convert the following 1) electron volt to joule 2) joule to electron volt 3) Armstrong to meters 4 ) electron volt to meters

The three diagrams in the following figure show the lines of force (field lines) between the poles of two magnets. Identify the poles A,B,C,D,E and F.

What is the diameter of an eyes?

A kite is flying, attached to a thread which is 165m long. The thread makes an angle of 300 with the ground. The height of the kite from the ground, assuming that there is no slack in the thread is

Consider a short dipole. Let a be the electric field at a distance r from the axis, on the axial line. Let b be the electric field at a point at a distance r from the dipole measured along a line making angle with the dipole moment. If a is perpendicular to b then ( |a| / | b|) = n tan. Find n.

The current produced by a generator with slip rings will have which of the following variations with time?

23. For the methane -oxygen fuel cell if standard free energy change is -965KJ/mol what will be standard cell emf?

What is central force in easy words?

If v = speed, f = frequency, λ = wavelength and T = time period, then which of the following expression(s) is/are correct?

What is the role of the split ring in an electric motor?

Is total energy of simple harmonic motion dependent or independent of mass?

By saying 'Now I am a lake' the narrator wants to show that i. the poem is not only about external beauty but also the inside of a person ii. the lake can also reflect surfaces iii. the depth of the lake is important iv. the lake does not show as exact an image as a mirror

The equivalent resistance between A and B

If a ray passing through the focus gets refracted by a convex lens, where will it intersect the principal axis?

what is power of accomodation ?

As light rays travel from air into a glass prism, they:

Question 21Why does a light ray incident on a rectangular glass slab immersed in any medium emerges parallel to itself? Explain using a diagram.

Two wires are kept tight between the same pair of supports.The tensions in the wires ar in the ratio 2:1,the radii are in the ratio 3:1 and densities are in the ratio 1:2 .Ratio of their fundamental frequencies is?

if 2 ampere current flows in a uniform conductor which has 1 into 10 to the power 24 electrons per metre what is the average velocity

an ideal monoatomic gas is allowed to expand adiabatically so that its pressure and temperature are related as P=cT^x

The value of g at a certain height h above the free surface of earth is x/4 , where x is the value of g at the surface of earth. The height h is

6 A lens is cut into two equal halves (i) along the principal axis (i) perpendicular to principal axis. What will be the focallength of each half?

Why do we have two eyes and not just one?

Why lense refract light?

A projectile can have the same range 'R' for twoangles of projection. If t, and t, be the times offlight in the two cases, then the initial velocity ofprojectile is

Question 15You are given water, mustard oil, glycerine and kerosene. In which of these media a ray of light incident obliquely at same angle would bend the most?(a) Kerosene(b) Water(c) Mustard oil(d) Glycerine