16569 + Interview Questions in Physics

1.	One end of a spring is kept fixed while the other end is stretched by a force as shown in the diagram. Name one instrument which works on the above principle.
Answer» One end of a spring is kept fixed while the other end is stretched by a force as shown in the diagram. Name one instrument which works on the above principle.

1.

One end of a spring is kept fixed while the other end is stretched by a force as shown in the diagram. Name one instrument which works on the above principle.

Answer»

One end of a spring is kept fixed while the other end is stretched by a force as shown in the diagram.

Name one instrument which works on the above principle.

Discussion

2.	What will be the moment of force F about the nut if F = 10 N and d = 8 cm?
Answer» What will be the moment of force F about the nut if F = 10 N and d = 8 cm?

2.

What will be the moment of force F about the nut if F = 10 N and d = 8 cm?

Answer»

What will be the moment of force F about the nut if F = 10 N and d = 8 cm?

Discussion

3.	Momentum of a particle at time t is P=(1-cost)i + sint j power acting on the particle at time t is proportional to
Answer» Momentum of a particle at time t is P=(1-cost)i + sint j power acting on the particle at time t is proportional to

Discussion

4.	The amount of energy available from the complete conversion of 50 gram of mass into energy is
Answer» The amount of energy available from the complete conversion of 50 gram of mass into energy is

Discussion

5.	What is specific resistance?
Answer» What is specific resistance?

Discussion

6.	19. An object is released at one bank into a river { flowing with speed 5km/h towards east. Air is { blowing with speed 5km/h towards north. If width of { river is 200m, then time taken by floating object to reach the other bank is (Assume the object moves under effect of river and wind both)
Answer» 19. An object is released at one bank into a river { flowing with speed 5km/h towards east. Air is { blowing with speed 5km/h towards north. If width of { river is 200m, then time taken by floating object to reach the other bank is (Assume the object moves under effect of river and wind both)

Discussion

7.	An electron travelling west to east enters a chamber having a uniform electrostatic field in north to south direction. specify the direction in which a uniform magnetic field should set up to prevent the electron from deflecting from its straight line path
Answer» An electron travelling west to east enters a chamber having a uniform electrostatic field in north to south direction. specify the direction in which a uniform magnetic field should set up to prevent the electron from deflecting from its straight line path

Discussion

8.	State the correct sequence(1-7) of colours in the spectrum formed by prism A and prism B.
Answer» State the correct sequence(1-7) of colours in the spectrum formed by prism A and prism B.

Discussion

9.	electric field produced by plates are which one 1. sigma/E or 2. sigma/2E
Answer» electric field produced by plates are which one 1. sigma/E or 2. sigma/2E

Discussion

10.	How eye defect can be correct?
Answer» How eye defect can be correct?

Discussion

11.	An object is placed in front of a convex lens such that the image formed has the same size as that of the object. The object is placed at:
Answer» An object is placed in front of a convex lens such that the image formed has the same size as that of the object. The object is placed at:

Discussion

12.	What is the minimum velocity needed for a spaceship to escape the Earth's gravitational force?
Answer» What is the minimum velocity needed for a spaceship to escape the Earth's gravitational force?

Discussion

13.	How much should the pressure be increased in order to decrease the volume of a gas by 5% at constant temperature?
Answer» How much should the pressure be increased in order to decrease the volume of a gas by 5% at constant temperature?

Discussion

14.	a block whose mass is 2kg is fastened to a spring whose spring cons†an t is 100. It is pulled to a dis†an ce x=0.1m from its equilibrium position at x= 0 on a frictionless surface from rest at t= 0 .calculate the kinetic energy of the block when it is 0.05m away from the mean positio mean position.
Answer» a block whose mass is 2kg is fastened to a spring whose spring cons†an t is 100. It is pulled to a dis†an ce x=0.1m from its equilibrium position at x= 0 on a frictionless surface from rest at t= 0 .calculate the kinetic energy of the block when it is 0.05m away from the mean positio mean position.

Discussion

15.	A block of ice at - 10∘C is slowly heated and converted to steam at 100∘C. which of the following curve represents the phenomenon qualitatively?
Answer» A block of ice at - $10^{\circ} C$ is slowly heated and converted to steam at $100^{\circ} C$ . which of the following curve represents the phenomenon qualitatively?

Discussion

16.	Select the right option regarding the ammeter or voltmeter reading in circuit shown below.
Answer» Select the right option regarding the ammeter or voltmeter reading in circuit shown below.

Discussion

17.	What adjustments would you make for tuning a stringed instrument for it to emit a note of a desired frequency ?
Answer» What adjustments would you make for tuning a stringed instrument for it to emit a note of a desired frequency ?

Discussion

18.	What are the disadvantages of burning fossil fuels?
Answer» What are the disadvantages of burning fossil fuels?

Discussion

19.	Arrange the following fuels in the order of decreasing calorific values (keeping the fuel with the highest calorific value first): Biogas, Kerosene, Wood, Petrol, Hydrogen gas, Methane
Answer» Arrange the following fuels in the order of decreasing calorific values (keeping the fuel with the highest calorific value first): Biogas, Kerosene, Wood, Petrol, Hydrogen gas, Methane

Discussion

20.	What is the nature (converging or diverging) of concave lens ,convex lens and concave mirror, convex mirror
Answer» What is the nature (converging or diverging) of concave lens ,convex lens and concave mirror, convex mirror

Discussion

21.	Draw a-t , v-tand x-t graph of a ball dropped from height 80m with initial velcocity 0.(Take g= negative
Answer» Draw a-t , v-tand x-t graph of a ball dropped from height 80m with initial velcocity 0.(Take g= negative

Discussion

22.	We all have observed that some people have black eyes, some brown and some light blue. Which part of the eye gives the colour?
Answer» We all have observed that some people have black eyes, some brown and some light blue. Which part of the eye gives the colour?

Discussion

23.	If AB is an object and A'B' is an image formed, then match the following.
Answer» If AB is an object and A'B' is an image formed, then match the following.

23.

If AB is an object and A'B' is an image formed, then match the following.

Answer»

If AB is an object and A'B' is an image formed, then match the following.

Discussion

24.	In the above figure, the parallel rays meet/appear to meet ___.
Answer» In the above figure, the parallel rays meet/appear to meet ___.

24.

In the above figure, the parallel rays meet/appear to meet ___.

Answer»

In the above figure, the parallel rays meet/appear to meet ___.

Discussion

25.	The refractive index of glass with respect to air is 32. The refractive index of air with respect to glass will be?
Answer» The refractive index of glass with respect to air is $\frac{3}{2}$ . The refractive index of air with respect to glass will be?

Discussion

26.	An electric generator is owned by a company. Which constituent of petroleum should be used as a fuel? __
Answer» An electric generator is owned by a company. Which constituent of petroleum should be used as a fuel? __

Discussion

27.	Two 220 volt, 100 watt bulbs are connected first in seriesand then in parallel. Each time the combination is connectedto a 220 volt a.c. supply line. The power drawn by thecombination in each case respectively will be(a) 50 watt, 100 watt (b) 100 watt, 50 watt(e) 200 watt, 150 watt (d) 50 watt, 200 watt
Answer» Two 220 volt, 100 watt bulbs are connected first in seriesand then in parallel. Each time the combination is connectedto a 220 volt a.c. supply line. The power drawn by thecombination in each case respectively will be(a) 50 watt, 100 watt (b) 100 watt, 50 watt(e) 200 watt, 150 watt (d) 50 watt, 200 watt

Discussion

28.	Explain the meaning of the words 'electromagnetic' and 'induction' in the term electromagnetic induction. On what factors does the value of induced current produced in a circuit depend? Name and state the rule used for determination of the direction of induced current. State one practical application of this phenomenon in everyday life.
Answer» Explain the meaning of the words 'electromagnetic' and 'induction' in the term electromagnetic induction. On what factors does the value of induced current produced in a circuit depend? Name and state the rule used for determination of the direction of induced current. State one practical application of this phenomenon in everyday life.

Discussion

29.	Heat generated in current carrying conductor___.
Answer» Heat generated in current carrying conductor___.

Discussion

30.	ntThree identical bulbs each of 100W are connected in series to a 220 V power source . Now two bulbs are replaced by 60 W bulbs , how will the brightness of remaining 100W bulb change?n
Answer» ntThree identical bulbs each of 100W are connected in series to a 220 V power source . Now two bulbs are replaced by 60 W bulbs , how will the brightness of remaining 100W bulb change?n

Discussion

31.	what is the difference between universal gravitational constant and acceleration due to gravity ?and define both universal gravitational constant and acceleration due to gravity?
Answer» what is the difference between universal gravitational constant and acceleration due to gravity ? and define both universal gravitational constant and acceleration due to gravity?

Discussion

32.	Difference between egestion and excretion.
Answer» Difference between egestion and excretion.

Discussion

33.	If the change in the value of 'g' at a height h above the surface of the earth is the same as at a depth x below it, then (both x and h being much smaller than the radius of the earth)
Answer» If the change in the value of 'g' at a height h above the surface of the earth is the same as at a depth x below it, then (both x and h being much smaller than the radius of the earth)

Discussion

34.	In the reactor of a nuclear power plant, name the material which is used : (a) as a moderator (b) to absorb radiations (c) in the fuel rods (d) in the control rods (e) to carrry away heat
Answer» In the reactor of a nuclear power plant, name the material which is used : (a) as a moderator (b) to absorb radiations (c) in the fuel rods (d) in the control rods (e) to carrry away heat

Discussion

35.	A thin conducting wire in the shape of a 'figure of eight' is situated with its circular loops in two planes making an angle of 120∘ with each other, if the current in the loop is I and the radius is R the magnetic induction at a point of intersection P to axes in the loops is Nμ0i48R. Find N.
Answer» A thin conducting wire in the shape of a 'figure of eight' is situated with its circular loops in two planes making an angle of $120^{\circ}$ with each other, if the current in the loop is $I$ and the radius is $R$ the magnetic induction at a point of intersection $P$ to axes in the loops is $\frac{N μ_{0} i}{48 R}$ . Find $N$ .

Discussion

36.	Derive the SI Unit of resistivity
Answer» Derive the SI Unit of resistivity

Discussion

37.	Ques 1: In Ohm's law experiment, the p.d across a resistor was measured as 5.0V and the current measured as 2.00A. The maximum permissible error in the resistance is?Ques 2: If x=7-0.35 and y=7.0-0.35 then use appropriate s.f for x and y.
Answer» Ques 1: In Ohm's law experiment, the p.d across a resistor was measured as 5.0V and the current measured as 2.00A. The maximum permissible error in the resistance is? Ques 2: If x=7-0.35 and y=7.0-0.35 then use appropriate s.f for x and y.

Discussion

38.	The force exerted on a current-carrying wire placed in a magnetic field is zero when the angle between the wire and the direction of magnetic field is : (a) 45o (a) 60o (a) 90o (d) 180o
Answer» The force exerted on a current-carrying wire placed in a magnetic field is zero when the angle between the wire and the direction of magnetic field is : (a) $45^{o}$ (a) $60^{o}$ (a) $90^{o}$ (d) $180^{o}$

38.

The force exerted on a current-carrying wire placed in a magnetic field is zero when the angle between the wire and the direction of magnetic field is : (a) 45o (a) 60o (a) 90o (d) 180o

Answer»

The force exerted on a current-carrying wire placed in a magnetic field is zero when the angle between the wire and the direction of magnetic field is :

(a) $45^{o}$ (a) $60^{o}$ (a) $90^{o}$ (d) $180^{o}$

Discussion

39.	How do water droplets act like a prism?
Answer» How do water droplets act like a prism?

Discussion

40.	A block of mass 2kg is at rest on a rough inclined surface of inclination 45 degree The contact force between block and plane is (g=10m/s^(2)) 0.10N 0.sqrt(2)N 0.20N
Answer» A block of mass 2kg is at rest on a rough inclined surface of inclination 45 degree The contact force between block and plane is (g=10m/s^(2)) 0.10N 0.sqrt(2)N 0.20N

Discussion

41.	For the circuit shown in the following diagram, what is the value of (i) current through 6 Ω resistor (ii) the potential difference across 12 Ω
Answer» For the circuit shown in the following diagram, what is the value of (i) current through 6 $Ω$ resistor (ii) the potential difference across 12 $Ω$

41.

For the circuit shown in the following diagram, what is the value of (i) current through 6 Ω resistor (ii) the potential difference across 12 Ω

Answer»

For the circuit shown in the following diagram, what is the value of

(i) current through 6 $Ω$ resistor

(ii) the potential difference across 12 $Ω$

Discussion

42.	22.When a ray of light in air enters a liquid, it is formed that the angle between the incident and the refracted rays is 150^° and the angle between the reflected and refracted ray is 60^°.Refractive index of the liquid is how much?
Answer» 22.When a ray of light in air enters a liquid, it is formed that the angle between the incident and the refracted rays is 150^° and the angle between the reflected and refracted ray is 60^°.Refractive index of the liquid is how much?

Discussion

43.	Name the characterstic of the sound affected due to a change in its ( i) amplitude, (ii) wave form, and (iii) frequency.
Answer» Name the characterstic of the sound affected due to a change in its ( i) amplitude, (ii) wave form, and (iii) frequency.

Discussion

44.	An object placed at a distance of 9cm from the first principal focus of a convex lens, produces a real image at a distance of 25cm from its second principal focus away from the lens. Then the focal length of the lens is:
Answer» An object placed at a distance of 9cm from the first principal focus of a convex lens, produces a real image at a distance of 25cm from its second principal focus away from the lens. Then the focal length of the lens is:

Discussion

45.	A coil had 100 turns. The radius of each turn is 20cm. An iron rod (μ_r=35) is introduced inside it. Find the magnetic field at the centre when the current in the coil is 2A. (1)0.022A (2)0.22A (3)0.33A (4)0.033A
Answer» A coil had 100 turns. The radius of each turn is 20cm. An iron rod (μ_r=35) is introduced inside it. Find the magnetic field at the centre when the current in the coil is 2A. (1)0.022A (2)0.22A (3)0.33A (4)0.033A

Discussion

46.	As per IS456:2000, the PH value of water for concrete mix shall NOT be less than
Answer» As per $I S 456 : 2000$ , the $P H$ value of water for concrete mix shall $N O T$ be less than

Discussion

47.	66. If the electron of hydrogen atom takes 3.2×10 to the power -17sec to complete one revolution, then how much current is constituted?
Answer» 66. If the electron of hydrogen atom takes 3.2×10 to the power -17sec to complete one revolution, then how much current is constituted?

Discussion

48.	72.In the network of 6 wires,each has the same electrical conductances equal to C.The effective resistance between A and B
Answer» 72.In the network of 6 wires,each has the same electrical conductances equal to C.The effective resistance between A and B

Discussion

49.	(a) What are natural resources? Name some of the important natural resources.(b) State two factors which work against an equitable distribution of natural resources.
Answer» (a) What are natural resources? Name some of the important natural resources. (b) State two factors which work against an equitable distribution of natural resources.

Discussion

50.	The elements of electrical heating devices are usually made of: (a) tungsten (b) bronze (c) nichrome (d) argon
Answer» The elements of electrical heating devices are usually made of: (a) tungsten (b) bronze (c) nichrome (d) argon

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

One end of a spring is kept fixed while the other end is stretched by a force as shown in the diagram. Name one instrument which works on the above principle.

What will be the moment of force F about the nut if F = 10 N and d = 8 cm?

Momentum of a particle at time t is P=(1-cost)i + sint j power acting on the particle at time t is proportional to

The amount of energy available from the complete conversion of 50 gram of mass into energy is

What is specific resistance?

19. An object is released at one bank into a river { flowing with speed 5km/h towards east. Air is { blowing with speed 5km/h towards north. If width of { river is 200m, then time taken by floating object to reach the other bank is (Assume the object moves under effect of river and wind both)

An electron travelling west to east enters a chamber having a uniform electrostatic field in north to south direction. specify the direction in which a uniform magnetic field should set up to prevent the electron from deflecting from its straight line path

State the correct sequence(1-7) of colours in the spectrum formed by prism A and prism B.

electric field produced by plates are which one 1. sigma/E or 2. sigma/2E

How eye defect can be correct?

An object is placed in front of a convex lens such that the image formed has the same size as that of the object. The object is placed at:

What is the minimum velocity needed for a spaceship to escape the Earth's gravitational force?

How much should the pressure be increased in order to decrease the volume of a gas by 5% at constant temperature?

A block of ice at - 10∘C is slowly heated and converted to steam at 100∘C. which of the following curve represents the phenomenon qualitatively?

Select the right option regarding the ammeter or voltmeter reading in circuit shown below.

What adjustments would you make for tuning a stringed instrument for it to emit a note of a desired frequency ?

What are the disadvantages of burning fossil fuels?

Arrange the following fuels in the order of decreasing calorific values (keeping the fuel with the highest calorific value first): Biogas, Kerosene, Wood, Petrol, Hydrogen gas, Methane

What is the nature (converging or diverging) of concave lens ,convex lens and concave mirror, convex mirror

Draw a-t , v-tand x-t graph of a ball dropped from height 80m with initial velcocity 0.(Take g= negative

We all have observed that some people have black eyes, some brown and some light blue. Which part of the eye gives the colour?

If AB is an object and A'B' is an image formed, then match the following.

In the above figure, the parallel rays meet/appear to meet ___.

The refractive index of glass with respect to air is 32. The refractive index of air with respect to glass will be?

An electric generator is owned by a company. Which constituent of petroleum should be used as a fuel? __

Heat generated in current carrying conductor___.

ntThree identical bulbs each of 100W are connected in series to a 220 V power source . Now two bulbs are replaced by 60 W bulbs , how will the brightness of remaining 100W bulb change?n

what is the difference between universal gravitational constant and acceleration due to gravity ?and define both universal gravitational constant and acceleration due to gravity?

Difference between egestion and excretion.

If the change in the value of 'g' at a height h above the surface of the earth is the same as at a depth x below it, then (both x and h being much smaller than the radius of the earth)

In the reactor of a nuclear power plant, name the material which is used : (a) as a moderator (b) to absorb radiations (c) in the fuel rods (d) in the control rods (e) to carrry away heat

A thin conducting wire in the shape of a 'figure of eight' is situated with its circular loops in two planes making an angle of 120∘ with each other, if the current in the loop is I and the radius is R the magnetic induction at a point of intersection P to axes in the loops is Nμ0i48R. Find N.

Derive the SI Unit of resistivity

Ques 1: In Ohm's law experiment, the p.d across a resistor was measured as 5.0V and the current measured as 2.00A. The maximum permissible error in the resistance is?Ques 2: If x=7-0.35 and y=7.0-0.35 then use appropriate s.f for x and y.

The force exerted on a current-carrying wire placed in a magnetic field is zero when the angle between the wire and the direction of magnetic field is : (a) 45o (a) 60o (a) 90o (d) 180o

How do water droplets act like a prism?

A block of mass 2kg is at rest on a rough inclined surface of inclination 45 degree The contact force between block and plane is (g=10m/s^(2)) 0.10N 0.sqrt(2)N 0.20N

For the circuit shown in the following diagram, what is the value of (i) current through 6 Ω resistor (ii) the potential difference across 12 Ω

22.When a ray of light in air enters a liquid, it is formed that the angle between the incident and the refracted rays is 150^° and the angle between the reflected and refracted ray is 60^°.Refractive index of the liquid is how much?

Name the characterstic of the sound affected due to a change in its ( i) amplitude, (ii) wave form, and (iii) frequency.

An object placed at a distance of 9cm from the first principal focus of a convex lens, produces a real image at a distance of 25cm from its second principal focus away from the lens. Then the focal length of the lens is:

A coil had 100 turns. The radius of each turn is 20cm. An iron rod (μ_r=35) is introduced inside it. Find the magnetic field at the centre when the current in the coil is 2A. (1)0.022A (2)0.22A (3)0.33A (4)0.033A

As per IS456:2000, the PH value of water for concrete mix shall NOT be less than

66. If the electron of hydrogen atom takes 3.2×10 to the power -17sec to complete one revolution, then how much current is constituted?

72.In the network of 6 wires,each has the same electrical conductances equal to C.The effective resistance between A and B

(a) What are natural resources? Name some of the important natural resources.​(b) State two factors which work against an equitable distribution of natural resources.

The elements of electrical heating devices are usually made of: (a) tungsten (b) bronze (c) nichrome (d) argon

(a) What are natural resources? Name some of the important natural resources.(b) State two factors which work against an equitable distribution of natural resources.