16569 + Interview Questions in Physics

1.	Where, in a nuclear power station, is uranium used up?
Answer» Where, in a nuclear power station, is uranium used up?

Discussion

2.	A wire of uniform thickness with a resistance of 27 Ω is cut into three equal pieces and they are joined in parallel. The resistance of parallel combination is
Answer» A wire of uniform thickness with a resistance of 27 Ω is cut into three equal pieces and they are joined in parallel. The resistance of parallel combination is

Discussion

3.	The SI unit of intensity of sound is
Answer» The SI unit of intensity of sound is

Discussion

4.	A pendulum is oscillating on either side of its rest position.The correct statement is: (a) It has only the kinetic energy at its each position. (b) It has the maximum kinetic energy at its extreme position. (c) The sum of its kinetic and potential energies remains constant throughout the motion.
Answer» A pendulum is oscillating on either side of its rest position.The correct statement is: (a) It has only the kinetic energy at its each position. (b) It has the maximum kinetic energy at its extreme position. (c) The sum of its kinetic and potential energies remains constant throughout the motion.

4.

A pendulum is oscillating on either side of its rest position.The correct statement is: (a) It has only the kinetic energy at its each position. (b) It has the maximum kinetic energy at its extreme position. (c) The sum of its kinetic and potential energies remains constant throughout the motion.

Answer»

A pendulum is oscillating on either side of its rest position.The correct statement is:

(a) It has only the kinetic energy at its each position.

(b) It has the maximum kinetic energy at its extreme position.

(c) The sum of its kinetic and potential energies remains constant throughout the motion.

Discussion

5.	What property of water makes it an effective coolant?
Answer» What property of water makes it an effective coolant?

Discussion

6.	How to calculate angle of refraction when angle of incidence and angle of emergence is given?
Answer» How to calculate angle of refraction when angle of incidence and angle of emergence is given?

Discussion

7.	Explain why, the current that makes the heater element very hot, only slightly warms the connecting wires leading to the heater.
Answer» Explain why, the current that makes the heater element very hot, only slightly warms the connecting wires leading to the heater.

Discussion

8.	The resistors R1,R2,R3andR4 in the figure given below are all equal in value. What would you expect the voltmeters A, B and C to read assuming that the connecting wires in the circuit have negligible resistance?
Answer» The resistors $R_{1}, R_{2}, R_{3} a n d R_{4}$ in the figure given below are all equal in value. What would you expect the voltmeters A, B and C to read assuming that the connecting wires in the circuit have negligible resistance?

Discussion

9.	What type of lever is formed by the human body while (a) raising a load on the palm, and (b) raising the weight of body on toes?
Answer» What type of lever is formed by the human body while (a) raising a load on the palm, and (b) raising the weight of body on toes?

Discussion

10.	The incomplete diagram of an electric bell is given in the figure. Draw winding of coil on the core and complete the electric circuit in the diagram
Answer» The incomplete diagram of an electric bell is given in the figure. Draw winding of coil on the core and complete the electric circuit in the diagram

10.

The incomplete diagram of an electric bell is given in the figure. Draw winding of coil on the core and complete the electric circuit in the diagram

Answer»

The incomplete diagram of an electric bell is given in the figure. Draw winding of coil on the core and complete the electric circuit in the diagram

Discussion

11.	Which colour of white light is scattered the least ? Give reason.
Answer» Which colour of white light is scattered the least ? Give reason.

Discussion

12.	∧∘m(NH4OH) is equal to
Answer» $\land_{m}^{\circ} (N H_{4} O H)$ is equal to

Discussion

13.	In olden days, the convex lens was used to ignite by allowing the sun rays to be focused on the object to be ignited. The lens converges the heat rays just like converging the light rays. What kind of image is formed by the convex lens?
Answer» In olden days, the convex lens was used to ignite by allowing the sun rays to be focused on the object to be ignited. The lens converges the heat rays just like converging the light rays. What kind of image is formed by the convex lens?

Discussion

14.	When the great Himalayan National Park was formed, the practice of grazing sheep in summer was put to an end. What was the result of stopping this practice?
Answer» When the great Himalayan National Park was formed, the practice of grazing sheep in summer was put to an end. What was the result of stopping this practice?

Discussion

15.	When a magnet is brought close to a wire-loop, the magnetic field around the loop ____
Answer» When a magnet is brought close to a wire-loop, the magnetic field around the loop ____

Discussion

16.	The sound is produced because of _______ of a particle.
Answer» The sound is produced because of _______ of a particle.

16.

The sound is produced because of _______ of a particle.

Answer»

The sound is produced because of _______ of a particle.

Discussion

17.	Which of the following can be the wavelength of red colour?
Answer» Which of the following can be the wavelength of red colour?

Discussion

18.	In beta decay, an electron, e− (or a positron, e+) is emitted by a nucleus. What happens to the atom, among the following options?
Answer» In beta decay, an electron, $e^{-}$ (or a positron, $e^{+}$ ) is emitted by a nucleus. What happens to the atom, among the following options?

Discussion

19.	Question 4 A two-wheeler covers a distance of 55.3 km in one litre of petrol. How much distance will it Cover in 10 litres of petrol
Answer» Question 4 A two-wheeler covers a distance of 55.3 km in one litre of petrol. How much distance will it Cover in 10 litres of petrol

Discussion

20.	A truck driver can load oil drums into the back of the truck by pushing them up a sloping plank or by lifting them directly. Each drum has a mass of 80 kg, the plank is 3m long and the back of the truck is 0.8m above the ground. Assuming that there is no friction between the plank and the drum, calculate i) the MA of the inclined plank, ii) the force needed to push a drum up the plank.
Answer» A truck driver can load oil drums into the back of the truck by pushing them up a sloping plank or by lifting them directly. Each drum has a mass of 80 kg, the plank is 3m long and the back of the truck is 0.8m above the ground. Assuming that there is no friction between the plank and the drum, calculate i) the MA of the inclined plank, ii) the force needed to push a drum up the plank.

Discussion

21.	Name the characteristic which enables one to distinguish the sound of two musical instruments even if they are of the same pitch and same loudness.
Answer» Name the characteristic which enables one to distinguish the sound of two musical instruments even if they are of the same pitch and same loudness.

Discussion

22.	Name two devices which can be utilised for the cooking of food so as to save fuel.
Answer» Name two devices which can be utilised for the cooking of food so as to save fuel.

Discussion

23.	The wheel rotates half a cycle in the expansion stroke and rotates the other half because of ___
Answer» The wheel rotates half a cycle in the expansion stroke and rotates the other half because of ___

Discussion

24.	In which type of body do molecules and atoms move faster or are more active?
Answer» In which type of body do molecules and atoms move faster or are more active?

Discussion

25.	What is the magnifying power of a simple microscope if the image is formed at least the distance of distinct vision from the eye(D)?
Answer» What is the magnifying power of a simple microscope if the image is formed at least the distance of distinct vision from the eye(D)?

Discussion

26.	Sort the following media according to the velocity of sound through them in ascending order at the same temperature:
Answer» Sort the following media according to the velocity of sound through them in ascending order at the same temperature:

Discussion

27.	Why we can't touch the rainbow?
Answer» Why we can't touch the rainbow?

Discussion

28.	Which of the following expressions represent(s) the electrical power in a circuit? (V - Potential difference, I - current and R - Resistance)
Answer» Which of the following expressions represent(s) the electrical power in a circuit? (V - Potential difference, I - current and R - Resistance)

Discussion

29.	The reading of an ideal Voltmeter connected across R in the circuit shown below is:
Answer» The reading of an ideal Voltmeter connected across R in the circuit shown below is:

29.

The reading of an ideal Voltmeter connected across R in the circuit shown below is:

Answer»

The reading of an ideal Voltmeter connected across R in the circuit shown below is:

Discussion

30.	A substance has nearly zero resistance at a temperature of 1 K. Such a substance is called:
Answer» A substance has nearly zero resistance at a temperature of 1 K. Such a substance is called:

Discussion

31.	A lens forms the image of an object placed at a distance of 45 cm from it on a screen placed at a distance 90 cm on other side of it. (a) Name the kind of lens. (b) Find : (i) the focal length of lens, and (ii) the magnification of image.
Answer» A lens forms the image of an object placed at a distance of 45 cm from it on a screen placed at a distance 90 cm on other side of it. (a) Name the kind of lens. (b) Find : (i) the focal length of lens, and (ii) the magnification of image.

Discussion

32.	Compression and rarefaction is related to which of these waves?
Answer» Compression and rarefaction is related to which of these waves?

Discussion

33.	A resistance of 4Ω and a wire of length 5 metres and resistance 5Ω are joined in series and connected to a cell of emf 10 V and internal resistance 1Ω. A parallel combination of two identical cells is balanced across 300 cm of the wire. The emf E of each cell is
Answer» A resistance of $4 Ω$ and a wire of length 5 metres and resistance $5 Ω$ are joined in series and connected to a cell of emf 10 V and internal resistance $1 Ω$ . A parallel combination of two identical cells is balanced across 300 cm of the wire. The emf E of each cell is

Discussion

34.	Determine the moment of force about the bolt if you are pulling a wrench of length 0.25 m with a force of 300 N, perpendicular to the wrench
Answer» Determine the moment of force about the bolt if you are pulling a wrench of length 0.25 m with a force of 300 N, perpendicular to the wrench

Discussion

35.	If we break the magnet from the middle, what will be the total no of poles?
Answer» If we break the magnet from the middle, what will be the total no of poles?

35.

If we break the magnet from the middle, what will be the total no of poles?

Answer»

If we break the magnet from the middle, what will be the total no of poles?

Discussion

36.	Question 117 (ii) Physical Science Application Unequal masses will not balance on a fulcrum, if they are at equal distance from it, one side will go up and the other side will go down. Unequal masses will balance when the following proportion is true. Two children can be balanced on a see-saw, when mass 1length 2=mass 2length 1 The child on the left and child on the right are balanced. What is the mass of the child on the right?
Answer» Question 117 (ii) Physical Science Application Unequal masses will not balance on a fulcrum, if they are at equal distance from it, one side will go up and the other side will go down. Unequal masses will balance when the following proportion is true. Two children can be balanced on a see-saw, when $\frac{m a s s 1}{l e n g t h 2} = \frac{m a s s 2}{l e n g t h 1}$ The child on the left and child on the right are balanced. What is the mass of the child on the right?

36.

Question 117 (ii) Physical Science Application Unequal masses will not balance on a fulcrum, if they are at equal distance from it, one side will go up and the other side will go down. Unequal masses will balance when the following proportion is true. Two children can be balanced on a see-saw, when mass 1length 2=mass 2length 1 The child on the left and child on the right are balanced. What is the mass of the child on the right?

Answer»

Question 117 (ii)

Physical Science Application
Unequal masses will not balance on a fulcrum, if they are at equal distance from it, one side will go up and the other side will go down.
Unequal masses will balance when the following proportion is true.

Two children can be balanced on a see-saw, when $\frac{m a s s 1}{l e n g t h 2} = \frac{m a s s 2}{l e n g t h 1}$

The child on the left and child on the right are balanced. What is the mass of the child on the right?

Discussion

37.	Boiling is the condition of:
Answer» Boiling is the condition of:

Discussion

38.	A person suffering from myopia cannot see clearly beyond 1 m. What should be the focal length of the concave lens that will correct his vision?
Answer» A person suffering from myopia cannot see clearly beyond 1 m. What should be the focal length of the concave lens that will correct his vision?

Discussion

39.	A block weighs W is held against a vertical wall by applying a horizontal force F. The minimum value of F needed to hold the block is?
Answer» A block weighs W is held against a vertical wall by applying a horizontal force F. The minimum value of F needed to hold the block is?

Discussion

40.	Name a clean gaseous fuel other than LPG and natural gas.
Answer» Name a clean gaseous fuel other than LPG and natural gas.

Discussion

41.	A ray of light travels from an optically denser to rarer medium. The critical angle for the two media is c. The maximum possible deviation of the ray will be
Answer» A ray of light travels from an optically denser to rarer medium. The critical angle for the two media is c. The maximum possible deviation of the ray will be

41.

A ray of light travels from an optically denser to rarer medium. The critical angle for the two media is c. The maximum possible deviation of the ray will be

Answer»

A ray of light travels from an optically denser to rarer medium. The critical angle for the two media is c. The maximum possible deviation of the ray will be

Discussion

42.	An object 5 cm high is held 25 cm away from a converging lens of focal length 10 cm. Find the position, size and nature of the image formed. Also draw the ray diagram.
Answer» An object 5 cm high is held 25 cm away from a converging lens of focal length 10 cm. Find the position, size and nature of the image formed. Also draw the ray diagram.

Discussion

43.	What is meant by 'refraction of light' ? Draw a labelled ray diagram to show the refraction of light.
Answer» What is meant by 'refraction of light' ? Draw a labelled ray diagram to show the refraction of light.

Discussion

44.	Calculate the equivalent resistance between A and B from the following diagram:
Answer» Calculate the equivalent resistance between A and B from the following diagram:

44.

Calculate the equivalent resistance between A and B from the following diagram:

Answer»

Calculate the equivalent resistance between A and B from the following diagram:

Discussion

45.	Fill in the following blanks with suitable words : (a) Light travelling along a normal is ___ refracted. (b) Light bends when it passes from water into air. We say that it is ___.
Answer» Fill in the following blanks with suitable words : (a) Light travelling along a normal is ___ refracted. (b) Light bends when it passes from water into air. We say that it is ___.

Discussion

46.	What happens to critical angle of a material when its temperature increases?
Answer» What happens to critical angle of a material when its temperature increases?

Discussion

47.	Explain with diagrams what is meant by the "series combination " and "parallel combination" of resistances. In which case the resultant resistance is (i) less, and (ii) more, than either of the individual resistances?
Answer» Explain with diagrams what is meant by the "series combination " and "parallel combination" of resistances. In which case the resultant resistance is (i) less, and (ii) more, than either of the individual resistances?

Discussion

48.	Which statement is /are correct? 1. An ammeter is connected in series in a circuit and a voltmeter is connected in parallel. 2. An ammeter has a high resistance. 3. A voltmeter has a low resistance.
Answer» Which statement is /are correct? 1. An ammeter is connected in series in a circuit and a voltmeter is connected in parallel. 2. An ammeter has a high resistance. 3. A voltmeter has a low resistance.

Discussion

49.	Draw a circuit diagram to show how two 4 V electric lamps can be lit brightly from two 2 V cells.
Answer» Draw a circuit diagram to show how two 4 V electric lamps can be lit brightly from two 2 V cells.

Discussion

50.	A bulb is rated as 250 V; 0.4 A. Find its : (i) power, and (ii) resistance.
Answer» A bulb is rated as 250 V; 0.4 A. Find its : (i) power, and (ii) resistance.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Where, in a nuclear power station, is uranium used up?

A wire of uniform thickness with a resistance of 27 Ω is cut into three equal pieces and they are joined in parallel. The resistance of parallel combination is

The SI unit of intensity of sound is

A pendulum is oscillating on either side of its rest position.The correct statement is: (a) It has only the kinetic energy at its each position. (b) It has the maximum kinetic energy at its extreme position. (c) The sum of its kinetic and potential energies remains constant throughout the motion.

What property of water makes it an effective coolant?

How to calculate angle of refraction when angle of incidence and angle of emergence is given?

Explain why, the current that makes the heater element very hot, only slightly warms the connecting wires leading to the heater.

The resistors R1,R2,R3andR4 in the figure given below are all equal in value. What would you expect the voltmeters A, B and C to read assuming that the connecting wires in the circuit have negligible resistance?

What type of lever is formed by the human body while (a) raising a load on the palm, and (b) raising the weight of body on toes?

The incomplete diagram of an electric bell is given in the figure. Draw winding of coil on the core and complete the electric circuit in the diagram

Which colour of white light is scattered the least ? Give reason.

∧∘m(NH4OH) is equal to

In olden days, the convex lens was used to ignite by allowing the sun rays to be focused on the object to be ignited. The lens converges the heat rays just like converging the light rays. What kind of image is formed by the convex lens?

When the great Himalayan National Park was formed, the practice of grazing sheep in summer was put to an end. What was the result of stopping this practice?

When a magnet is brought close to a wire-loop, the magnetic field around the loop ____

The sound is produced because of _______ of a particle.

Which of the following can be the wavelength of red colour?

In beta decay, an electron, e− (or a positron, e+) is emitted by a nucleus. What happens to the atom, among the following options?

Question 4 A two-wheeler covers a distance of 55.3 km in one litre of petrol. How much distance will it Cover in 10 litres of petrol

Name the characteristic which enables one to distinguish the sound of two musical instruments even if they are of the same pitch and same loudness.

Name two devices which can be utilised for the cooking of food so as to save fuel.

The wheel rotates half a cycle in the expansion stroke and rotates the other half because of ___

In which type of body do molecules and atoms move faster or are more active?

What is the magnifying power of a simple microscope if the image is formed at least the distance of distinct vision from the eye(D)?

Sort the following media according to the velocity of sound through them in ascending order at the same temperature:

Why we can't touch the rainbow?

Which of the following expressions represent(s) the electrical power in a circuit? (V - Potential difference, I - current and R - Resistance)

The reading of an ideal Voltmeter connected across R in the circuit shown below is:

A substance has nearly zero resistance at a temperature of 1 K. Such a substance is called:

A lens forms the image of an object placed at a distance of 45 cm from it on a screen placed at a distance 90 cm on other side of it. (a) Name the kind of lens. (b) Find : (i) the focal length of lens, and (ii) the magnification of image.

Compression and rarefaction is related to which of these waves?

A resistance of 4Ω and a wire of length 5 metres and resistance 5Ω are joined in series and connected to a cell of emf 10 V and internal resistance 1Ω. A parallel combination of two identical cells is balanced across 300 cm of the wire. The emf E of each cell is

Determine the moment of force about the bolt if you are pulling a wrench of length 0.25 m with a force of 300 N, perpendicular to the wrench

If we break the magnet from the middle, what will be the total no of poles?

Boiling is the condition of:

A person suffering from myopia cannot see clearly beyond 1 m. What should be the focal length of the concave lens that will correct his vision?

A block weighs W is held against a vertical wall by applying a horizontal force F. The minimum value of F needed to hold the block is?

Name a clean gaseous fuel other than LPG and natural gas.

A ray of light travels from an optically denser to rarer medium. The critical angle for the two media is c. The maximum possible deviation of the ray will be

An object 5 cm high is held 25 cm away from a converging lens of focal length 10 cm. Find the position, size and nature of the image formed. Also draw the ray diagram.

What is meant by 'refraction of light' ? Draw a labelled ray diagram to show the refraction of light.

Calculate the equivalent resistance between A and B from the following diagram:

Fill in the following blanks with suitable words : (a) Light travelling along a normal is ___ refracted. (b) Light bends when it passes from water into air. We say that it is ___.

What happens to critical angle of a material when its temperature increases?

Explain with diagrams what is meant by the "series combination " and "parallel combination" of resistances. In which case the resultant resistance is (i) less, and (ii) more, than either of the individual resistances?

Which statement is /are correct? 1. An ammeter is connected in series in a circuit and a voltmeter is connected in parallel. 2. An ammeter has a high resistance. 3. A voltmeter has a low resistance.

Draw a circuit diagram to show how two 4 V electric lamps can be lit brightly from two 2 V cells.

A bulb is rated as 250 V; 0.4 A. Find its : (i) power, and (ii) resistance.

Fill in the following blanks with suitable words : (a) Light travelling along a normal is _ refracted. (b) Light bends when it passes from water into air. We say that it is _.