16569 + Interview Questions in Physics

1.	A 10 kg mass rests on a horizontal frictionless table. How much energy is needed to accelerate the mass from rest to a speed of 5m/s
Answer» A 10 kg mass rests on a horizontal frictionless table. How much energy is needed to accelerate the mass from rest to a speed of 5m/s

Discussion

2.	Electrical energy is converted into light energy in _________.
Answer» Electrical energy is converted into light energy in _________.

Discussion

3.	44.At a place the angle of dip is 30. If the horizontal component of Earth's magnetic field is B the total intensity is ??. In terms of B ??
Answer» 44.At a place the angle of dip is 30. If the horizontal component of Earth's magnetic field is B the total intensity is ??. In terms of B ??

Discussion

4.	Question 22What is the role of the two conducting stationary brushes in a simple electric motor?
Answer» Question 22 What is the role of the two conducting stationary brushes in a simple electric motor?

Discussion

5.	26.Explain how a Zener diode helps to stabilize dc against load variation.
Answer» 26.Explain how a Zener diode helps to stabilize dc against load variation.

Discussion

6.	a thin rod of 10 cm long is placed along the axis of a concave lens of focal length 10 cm, such that the middle point of the rod is at a dis†an ce of 20 cmfrom the lens . the magnification of length of rod
Answer» a thin rod of 10 cm long is placed along the axis of a concave lens of focal length 10 cm, such that the middle point of the rod is at a dis†an ce of 20 cmfrom the lens . the magnification of length of rod

Discussion

7.	Question 9A constant current flows in a horizontal wire in the plane of the paper from east to west as shown in figure. The direction of magnetic field at a point will be north to south(a) directly above the wire(b) directly below the wire(c) at a point located in the plane of the paper, on the north side of the wire(d) at a point located in the plane of the paper, on the south side of the wire
Answer» Question 9 A constant current flows in a horizontal wire in the plane of the paper from east to west as shown in figure. The direction of magnetic field at a point will be north to south (a) directly above the wire (b) directly below the wire (c) at a point located in the plane of the paper, on the north side of the wire (d) at a point located in the plane of the paper, on the south side of the wire

Discussion

8.	One can demagnetise a magnet using current by
Answer» One can demagnetise a magnet using current by

Discussion

9.	What is a power loom? How is it used in the production of fabric?
Answer» What is a power loom? How is it used in the production of fabric?

Discussion

10.	Distinguish between:Electric current & Potential difference
Answer» Distinguish between: Electric current & Potential difference

Discussion

11.	Calculate wavelength of electron if its K.E increases nine times .
Answer» Calculate wavelength of electron if its K.E increases nine times .

Discussion

12.	A double convex lens has a focal length of 40 cm. If the radius of curvature of its refracting surfaces are 10 cm and 20 cm, find the refractive index of the material of the lens.
Answer» A double convex lens has a focal length of $40 cm$ . If the radius of curvature of its refracting surfaces are $10 cm$ and $20 cm$ , find the refractive index of the material of the lens.

Discussion

13.	Tom and jerry live together in a farm house. They do a lot of things which uses water. Their guardian Mr. Makau is worried about the usage of water by them. In order to conserve water, Mr. Makau has made a deal with them that whoever uses lesser water by the end of the month will get a prize. Look at their activities and decide who will win the prize. Their activities are as follows:- [5 MARKS]
Answer» Tom and jerry live together in a farm house. They do a lot of things which uses water. Their guardian Mr. Makau is worried about the usage of water by them. In order to conserve water, Mr. Makau has made a deal with them that whoever uses lesser water by the end of the month will get a prize. Look at their activities and decide who will win the prize. Their activities are as follows:- [5 MARKS]

13.

Tom and jerry live together in a farm house. They do a lot of things which uses water. Their guardian Mr. Makau is worried about the usage of water by them. In order to conserve water, Mr. Makau has made a deal with them that whoever uses lesser water by the end of the month will get a prize. Look at their activities and decide who will win the prize. Their activities are as follows:- [5 MARKS]

Answer»

Tom and jerry live together in a farm house. They do a lot of things which uses water. Their guardian Mr. Makau is worried about the usage of water by them. In order to conserve water, Mr. Makau has made a deal with them that whoever uses lesser water by the end of the month will get a prize. Look at their activities and decide who will win the prize. Their activities are as follows:- [5 MARKS]

Discussion

14.	How many bulbs of 8 ohms should be joined in parallel to draw a current of 2A from a battery of 4V? Does this circuit obey Ohm's Law?
Answer» How many bulbs of 8 ohms should be joined in parallel to draw a current of 2A from a battery of 4V? Does this circuit obey Ohm's Law?

Discussion

15.	Choose the correct statement about non-ohmic resistor.
Answer» Choose the correct statement about non-ohmic resistor.

Discussion

16.	An object of mass 1kg has p.e of 1 J relative to the ground when it is at a height of(g=9.8m/a square
Answer» An object of mass 1kg has p.e of 1 J relative to the ground when it is at a height of(g=9.8m/a square

Discussion

17.	two inductors are connected in parallel have equivalent inductance of 2H when connected in series has equivalence inductance of 9H then difference in their respective inductances is
Answer» two inductors are connected in parallel have equivalent inductance of 2H when connected in series has equivalence inductance of 9H then difference in their respective inductances is

Discussion

18.	Point out the components of an electric torch and explain how an electric torch works.
Answer» Point out the components of an electric torch and explain how an electric torch works.

Discussion

19.	Vikash has a younger sister who is just beginning to crawl around the house. She touches everything she comes across. Vikash realised that she could put her fingers into electrical sockets placed at a low height. He covered all such sockets with tape.Why did Vikash do this? What does this tell us about Vikash?
Answer» Vikash has a younger sister who is just beginning to crawl around the house. She touches everything she comes across. Vikash realised that she could put her fingers into electrical sockets placed at a low height. He covered all such sockets with tape. Why did Vikash do this? What does this tell us about Vikash?

Discussion

20.	A truck has a mass of 8000 kg, a car has a mass of 1000 kg and a bike has a mass of 100 kg. All of them are moving with the same velocity on a road. Then, the kinetic energy will be highest for the:
Answer» A truck has a mass of $8000 k g$ , a car has a mass of $1000 k g$ and a bike has a mass of $100 k g$ . All of them are moving with the same velocity on a road. Then, the kinetic energy will be highest for the:

Discussion

21.	34.The electric field at a distance 3R/2 from the centre of a nonconducting solid sphere of radius R is E. The electric field at distance R/2 from the centre of the sphere is
Answer» 34.The electric field at a distance 3R/2 from the centre of a nonconducting solid sphere of radius R is E. The electric field at distance R/2 from the centre of the sphere is

Discussion

22.	0. Given the reaction,2X(g)+ Y(g) Z(g)+ 80 kcalWhich combination of pressure and temperaturegives the highest yield of Z at equilibrium?(1) 1000 atm and 500^° C (2) 500 atm and 500^° c(3) 1000 atm and 100^° C (4) 500 atm and 100 C
Answer» 0. Given the reaction,2X(g)+ Y(g) Z(g)+ 80 kcalWhich combination of pressure and temperaturegives the highest yield of Z at equilibrium?(1) 1000 atm and 500^° C (2) 500 atm and 500^° c(3) 1000 atm and 100^° C (4) 500 atm and 100 C

Discussion

23.	What is solenoid What factors affect the solenoid How to solenoid helps in flowing current
Answer» What is solenoid What factors affect the solenoid How to solenoid helps in flowing current

Discussion

24.	Question 3What is the role of split ring in an electric motor?
Answer» Question 3 What is the role of split ring in an electric motor?

Discussion

25.	Which of these is an example of transverse wave?
Answer» Which of these is an example of transverse wave?

Discussion

26.	46.A short electric dipole of dipole moment p is placed in a uniform electric field E with its axis parallel to E. In this case, one of the equipotential surfaces enclosing the dipole forms a sphere.Find the radius of this sphere.
Answer» 46.A short electric dipole of dipole moment p is placed in a uniform electric field E with its axis parallel to E. In this case, one of the equipotential surfaces enclosing the dipole forms a sphere.Find the radius of this sphere.

Discussion

27.	A resistor of 6 kilo ohm with tolerance 10% and another of 4 kilo ohm with tolerance 10% are connected in series.The tolerance of the combination in parallel is
Answer» A resistor of 6 kilo ohm with tolerance 10% and another of 4 kilo ohm with tolerance 10% are connected in series.The tolerance of the combination in parallel is

Discussion

28.	Give your opinion about whether hydroelectric plants are environment friendly or not?
Answer» Give your opinion about whether hydroelectric plants are environment friendly or not?

Discussion

29.	The diagram shows a hollow cube of slide a and Volume V. There is a small chamber of volume V4 in its upper left corner as shown in figure. This chamber is completely filled with water of mass m kg. Water leaks through the hole and accumulates at the bottom of the bigger cube. Then the work done by gravity in this process, assuming that the complete water finally lies at the bottom of the cube is
Answer» The diagram shows a hollow cube of slide $a$ and Volume $V$ . There is a small chamber of volume $\frac{V}{4}$ in its upper left corner as shown in figure. This chamber is completely filled with water of mass $m kg$ . Water leaks through the hole and accumulates at the bottom of the bigger cube. Then the work done by gravity in this process, assuming that the complete water finally lies at the bottom of the cube is

Discussion

30.	For a normal eye , the cornea of eye provides a converging power of 40 D & the least converging power of the eye lens behind the cornea is 20 D . Using this information , the distance between the retina & the cornea-eye lens is can be estimated to be 1) 2.5 cm 2) 1.67 cm 3) 1.5 cm 4) 5 cm
Answer» For a normal eye , the cornea of eye provides a converging power of 40 D & the least converging power of the eye lens behind the cornea is 20 D . Using this information , the distance between the retina & the cornea-eye lens is can be estimated to be 1) 2.5 cm 2) 1.67 cm 3) 1.5 cm 4) 5 cm

Discussion

31.	Which of the given alternative is the mirror image of REASON, if the mirror is placed below the word?
Answer» Which of the given alternative is the mirror image of REASON, if the mirror is placed below the word?

Discussion

32.	State whether the following statements are true or false : (a) A wire with a green insulation is usually the live wire. (b) A miniature circuit bearker (MCB) works on the heating effect of current.
Answer» State whether the following statements are true or false : (a) A wire with a green insulation is usually the live wire. (b) A miniature circuit bearker (MCB) works on the heating effect of current.

32.

State whether the following statements are true or false : (a) A wire with a green insulation is usually the live wire. (b) A miniature circuit bearker (MCB) works on the heating effect of current.

Answer»

State whether the following statements are true or false :

(a) A wire with a green insulation is usually the live wire.

(b) A miniature circuit bearker (MCB) works on the heating effect of current.

Discussion

33.	Absolute scale of temperature is reproduced in the laboratory by making use of a
Answer» Absolute scale of temperature is reproduced in the laboratory by making use of a

Discussion

34.	The distance between a compression and the next rarefaction will be: (λ indicates the wavelength of the wave)
Answer» The distance between a compression and the next rarefaction will be: ( $λ$ indicates the wavelength of the wave)

34.

The distance between a compression and the next rarefaction will be: (λ indicates the wavelength of the wave)

Answer»

The distance between a compression and the next rarefaction will be:

( $λ$ indicates the wavelength of the wave)

Discussion

35.	An electic bulb marked 25W and 100V is connected across 50V supply. Now its power is (1)25 (2)12.5W (3)6.25W (4)50W
Answer» An electic bulb marked 25W and 100V is connected across 50V supply. Now its power is (1)25 (2)12.5W (3)6.25W (4)50W

Discussion

36.	Define power.A pair of bullocks exert a force of 140 N on a plough. The field being ploughed is 15 m long.How much work is done in ploughing the length of the field? [3 MARKS]
Answer» Define power. A pair of bullocks exert a force of 140 N on a plough. The field being ploughed is 15 m long. How much work is done in ploughing the length of the field? [3 MARKS]

Discussion

37.	If R is radius of the earth then approximate altitude of a geosynchronus satellite is (1) 4R (2) 6R (3) 8R (4) 9R
Answer» If R is radius of the earth then approximate altitude of a geosynchronus satellite is (1) 4R (2) 6R (3) 8R (4) 9R

Discussion

38.	Read the given lines and answer the questions that follow by ticking the correct choice: A woman bends over me, Searching my reaches for what she really is. Then she turns to those liars, the candles or the moon. (a) What is the woman bending over? the mirror the lake the opposite wall the moon and the candles (b) Why have the candles and the moon been called 'liars'? because they make people beautiful they hide the blemishes of people with their soft light they hide the blemishes and make people look beautiful in their soft glow they can't talk (c) Why does she turn to them in spite of calling them 'liars'? the reality is too harsh for her to bear she is desperately looking for someone to comfort her she wants to be told that she is still beautiful she can hide her signs of graying in their light
Answer» Read the given lines and answer the questions that follow by ticking the correct choice: A woman bends over me, Searching my reaches for what she really is. Then she turns to those liars, the candles or the moon. (a) What is the woman bending over? the mirror the lake the opposite wall the moon and the candles (b) Why have the candles and the moon been called 'liars'? because they make people beautiful they hide the blemishes of people with their soft light they hide the blemishes and make people look beautiful in their soft glow they can't talk (c) Why does she turn to them in spite of calling them 'liars'? the reality is too harsh for her to bear she is desperately looking for someone to comfort her she wants to be told that she is still beautiful she can hide her signs of graying in their light

38.

Read the given lines and answer the questions that follow by ticking the correct choice: A woman bends over me, Searching my reaches for what she really is. Then she turns to those liars, the candles or the moon. (a) What is the woman bending over? the mirror the lake the opposite wall the moon and the candles (b) Why have the candles and the moon been called 'liars'? because they make people beautiful they hide the blemishes of people with their soft light they hide the blemishes and make people look beautiful in their soft glow they can't talk (c) Why does she turn to them in spite of calling them 'liars'? the reality is too harsh for her to bear she is desperately looking for someone to comfort her she wants to be told that she is still beautiful she can hide her signs of graying in their light

Answer»

Read
the given lines and answer the questions that follow by ticking the
correct choice:

A
woman bends over me,

Searching
my reaches for what she really is.

Then
she turns to those liars, the candles or the moon.

(a)
What is the woman bending over?

the
mirror
the
lake
the
opposite wall
the
moon and the candles

(b)
Why have the candles and the moon been called 'liars'?

because
they make people beautiful
they
hide the blemishes of people with their soft light
they
hide the blemishes and make people look beautiful in their soft glow
they
can't talk

(c)
Why does she turn to them in spite of calling them 'liars'?

the
reality is too harsh for her to bear
she
is desperately looking for someone to comfort her
she
wants to be told
that
she is still beautiful
she
can hide her signs of graying in their light

Discussion

39.	A current (I) of 0.5 A is drawn by a filament of an electric bulb for time t=10 minutes. The amount of electric charge (Q) that flows through the circuit is:
Answer» A current $(I)$ of $0.5 A$ is drawn by a filament of an electric bulb for time $t = 10 m i n u t e s$ . The amount of electric charge $(Q)$ that flows through the circuit is:

Discussion

40.	From the given set of charges, which charges (s) is/are not possible?
Answer» From the given set of charges, which charges (s) is/are not possible?

Discussion

41.	ntAn electron moving along a horizontal line with respect to observer hand towards north. Due to Earth's magnetic field it deflects towards east and then position of observer will be?n
Answer» ntAn electron moving along a horizontal line with respect to observer hand towards north. Due to Earth's magnetic field it deflects towards east and then position of observer will be?n

Discussion

42.	Power losses in transmission lines occur due to heating. This is calculated using the formula : ___
Answer» Power losses in transmission lines occur due to heating. This is calculated using the formula : ___

Discussion

43.	Explain breifly about the satellites launched by ISRO.
Answer» Explain breifly about the satellites launched by ISRO.

Discussion

44.	A small bulb is placed at a depth of 2/7 m inwater and floating opaque disc is placed over thebulb so that the bulb is not visible from the surface.The minimum diameter of the disc is (water 4/3)(1) 42 m(3) 2/7 m(2) 6 m(4) 12 m
Answer» A small bulb is placed at a depth of 2/7 m inwater and floating opaque disc is placed over thebulb so that the bulb is not visible from the surface.The minimum diameter of the disc is (water 4/3)(1) 42 m(3) 2/7 m(2) 6 m(4) 12 m

Discussion

45.	Which type of mirrors are used in the following?Periscope, floodlights, shaving mirror, kaleidoscope, street lights, head lamps of a car.
Answer» Which type of mirrors are used in the following? Periscope, floodlights, shaving mirror, kaleidoscope, street lights, head lamps of a car.

Discussion

46.	what is directional and non-directional bonding?
Answer» what is directional and non-directional bonding?

Discussion

47.	How does uneven heating between the equator and the poles generate wind currents?
Answer» How does uneven heating between the equator and the poles generate wind currents?

Discussion

48.	Which defect is depicted in the image?
Answer» Which defect is depicted in the image?

Discussion

49.	A convex lens forms a real and inverted image of a point object at a dis†an ce 50 cm from the convex lens.A concave lens is placed 10 cm behind the convex lens on the image side.On placing a plane mirror on the image side and facing the concave lens it is observed that the finalimage now coincides with the object itself.The focal length of the concave lens is?
Answer» A convex lens forms a real and inverted image of a point object at a dis†an ce 50 cm from the convex lens.A concave lens is placed 10 cm behind the convex lens on the image side.On placing a plane mirror on the image side and facing the concave lens it is observed that the finalimage now coincides with the object itself.The focal length of the concave lens is?

Discussion

50.	In the circuit diagram given below five resistances of 10Ω,40Ω,30Ω,20Ω,and60Ω are connected in series to a 12 V battery. Calculate : (a) the total resistance in the circuit. (b) the total current flowing in the circuit.
Answer» In the circuit diagram given below five resistances of $10 Ω, 40 Ω, 30 Ω, 20 Ω, a n d 60 Ω$ are connected in series to a 12 V battery. Calculate : (a) the total resistance in the circuit. (b) the total current flowing in the circuit.

50.

In the circuit diagram given below five resistances of 10Ω,40Ω,30Ω,20Ω,and60Ω are connected in series to a 12 V battery. Calculate : (a) the total resistance in the circuit. (b) the total current flowing in the circuit.

Answer»

In the circuit diagram given below five resistances of $10 Ω, 40 Ω, 30 Ω, 20 Ω, a n d 60 Ω$
are connected in series to a 12 V battery.

Calculate :
(a) the total resistance in the circuit.
(b) the total current flowing in the circuit.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A 10 kg mass rests on a horizontal frictionless table. How much energy is needed to accelerate the mass from rest to a speed of 5m/s

Electrical energy is converted into light energy in _________.

44.At a place the angle of dip is 30. If the horizontal component of Earth's magnetic field is B the total intensity is ??. In terms of B ??

Question 22What is the role of the two conducting stationary brushes in a simple electric motor?

26.Explain how a Zener diode helps to stabilize dc against load variation.

a thin rod of 10 cm long is placed along the axis of a concave lens of focal length 10 cm, such that the middle point of the rod is at a dis†an ce of 20 cmfrom the lens . the magnification of length of rod

One can demagnetise a magnet using current by

What is a power loom? How is it used in the production of fabric?

Distinguish between:Electric current & Potential difference

Calculate wavelength of electron if its K.E increases nine times .

A double convex lens has a focal length of 40 cm. If the radius of curvature of its refracting surfaces are 10 cm and 20 cm, find the refractive index of the material of the lens.

How many bulbs of 8 ohms should be joined in parallel to draw a current of 2A from a battery of 4V? Does this circuit obey Ohm's Law?

Choose the correct statement about non-ohmic resistor.

An object of mass 1kg has p.e of 1 J relative to the ground when it is at a height of(g=9.8m/a square

two inductors are connected in parallel have equivalent inductance of 2H when connected in series has equivalence inductance of 9H then difference in their respective inductances is

Point out the components of an electric torch and explain how an electric torch works.

A truck has a mass of 8000 kg, a car has a mass of 1000 kg and a bike has a mass of 100 kg. All of them are moving with the same velocity on a road. Then, the kinetic energy will be highest for the:

34.The electric field at a distance 3R/2 from the centre of a nonconducting solid sphere of radius R is E. The electric field at distance R/2 from the centre of the sphere is

0. Given the reaction,2X(g)+ Y(g) Z(g)+ 80 kcalWhich combination of pressure and temperaturegives the highest yield of Z at equilibrium?(1) 1000 atm and 500^° C (2) 500 atm and 500^° c(3) 1000 atm and 100^° C (4) 500 atm and 100 C

What is solenoid What factors affect the solenoid How to solenoid helps in flowing current

Question 3What is the role of split ring in an electric motor?

Which of these is an example of transverse wave?

46.A short electric dipole of dipole moment p is placed in a uniform electric field E with its axis parallel to E. In this case, one of the equipotential surfaces enclosing the dipole forms a sphere.Find the radius of this sphere.

A resistor of 6 kilo ohm with tolerance 10% and another of 4 kilo ohm with tolerance 10% are connected in series.The tolerance of the combination in parallel is

Give your opinion about whether hydroelectric plants are environment friendly or not?

For a normal eye , the cornea of eye provides a converging power of 40 D & the least converging power of the eye lens behind the cornea is 20 D . Using this information , the distance between the retina & the cornea-eye lens is can be estimated to be 1) 2.5 cm 2) 1.67 cm 3) 1.5 cm 4) 5 cm

Which of the given alternative is the mirror image of REASON, if the mirror is placed below the word?

State whether the following statements are true or false : (a) A wire with a green insulation is usually the live wire. (b) A miniature circuit bearker (MCB) works on the heating effect of current.

Absolute scale of temperature is reproduced in the laboratory by making use of a

The distance between a compression and the next rarefaction will be: (λ indicates the wavelength of the wave)

An electic bulb marked 25W and 100V is connected across 50V supply. Now its power is (1)25 (2)12.5W (3)6.25W (4)50W

Define power.A pair of bullocks exert a force of 140 N on a plough. The field being ploughed is 15 m long.How much work is done in ploughing the length of the field? [3 MARKS]

If R is radius of the earth then approximate altitude of a geosynchronus satellite is (1) 4R (2) 6R (3) 8R (4) 9R

A current (I) of 0.5 A is drawn by a filament of an electric bulb for time t=10 minutes. The amount of electric charge (Q) that flows through the circuit is:

From the given set of charges, which charges (s) is/are not possible?

ntAn electron moving along a horizontal line with respect to observer hand towards north. Due to Earth's magnetic field it deflects towards east and then position of observer will be?n

Power losses in transmission lines occur due to heating. This is calculated using the formula : ___

Explain breifly about the satellites launched by ISRO.

A small bulb is placed at a depth of 2/7 m inwater and floating opaque disc is placed over thebulb so that the bulb is not visible from the surface.The minimum diameter of the disc is (water 4/3)(1) 42 m(3) 2/7 m(2) 6 m(4) 12 m

Which type of mirrors are used in the following?Periscope, floodlights, shaving mirror, kaleidoscope, street lights, head lamps of a car.

what is directional and non-directional bonding?

How does uneven heating between the equator and the poles generate wind currents?

Which defect is depicted in the image?

In the circuit diagram given below five resistances of 10Ω,40Ω,30Ω,20Ω,and60Ω are connected in series to a 12 V battery. Calculate : (a) the total resistance in the circuit. (b) the total current flowing in the circuit.