16569 + Interview Questions in Physics

1.	A block of mass 2.0 kg is pushed down an inclined plane of inclination 37∘ with a force of 20 N acting parallel to the incline. It is found that the block moves on the incline with an acceleration of 10 m/s2. If the block started from rest, find the work done (WF) by the applied force, work done (Wg) by the weight of the block and work done (Wf) by the frictional force acting on the block in the 1st second. Take g=10 m/s2.
Answer» A block of mass 2.0 kg is pushed down an inclined plane of inclination $37^{\circ}$ with a force of 20 N acting parallel to the incline. It is found that the block moves on the incline with an acceleration of $10 m / s^{2}$ . If the block started from rest, find the work done $(W_{F})$ by the applied force, work done $(W_{g})$ by the weight of the block and work done $(W_{f})$ by the frictional force acting on the block in the 1st second. Take $g = 10 m / s^{2}$ .

Discussion

2.	If a positively charged object has an affinity to attract another body, then, what charge does the other body possesses.
Answer» If a positively charged object has an affinity to attract another body, then, what charge does the other body possesses.

Discussion

3.	Question 35 Find out the following in the electric circuit given in the figure. (a) Effective resistance of two 8 Ω resistors in the combination (b) Current flowing through 4 Ω resistors (c) Potential difference across 4 Ω resistances (d) Power dissipated in 4 Ω resistors (e) Difference in ammeter readings, if any
Answer» Question 35 Find out the following in the electric circuit given in the figure. (a) Effective resistance of two 8 $Ω$ resistors in the combination (b) Current flowing through 4 $Ω$ resistors (c) Potential difference across 4 $Ω$ resistances (d) Power dissipated in 4 $Ω$ resistors (e) Difference in ammeter readings, if any

Discussion

4.	Which of the following are the disadvantages of hydel power generation?
Answer» Which of the following are the disadvantages of hydel power generation?

Discussion

5.	State where an object must be placed so that the image formed by a concave mirror is: (a) erect and virtual. (b) at infinity. (c) the same size the object.
Answer» State where an object must be placed so that the image formed by a concave mirror is: (a) erect and virtual. (b) at infinity. (c) the same size the object.

Discussion

6.	In a ring system, all the appliances receive the same voltage. But each appliance has a different voltage. What controls this?
Answer» In a ring system, all the appliances receive the same voltage. But each appliance has a different voltage. What controls this?

Discussion

7.	In fig. draw a tackle to lift the load by applying the force in the downward direction. (a) Mark in the diagram the direction of load L and effort E. (b) If the load is raised by 1 m, through what distance will the effort move ? (c) State the number of strands of tackle supporting the load. (d) What is the mechanical advantage of the system ?
Answer» In fig. draw a tackle to lift the load by applying the force in the downward direction. (a) Mark in the diagram the direction of load L and effort E. (b) If the load is raised by 1 m, through what distance will the effort move ? (c) State the number of strands of tackle supporting the load. (d) What is the mechanical advantage of the system ?

7.

In fig. draw a tackle to lift the load by applying the force in the downward direction. (a) Mark in the diagram the direction of load L and effort E. (b) If the load is raised by 1 m, through what distance will the effort move ? (c) State the number of strands of tackle supporting the load. (d) What is the mechanical advantage of the system ?

Answer»

In fig. draw a tackle to lift the load by applying the force in the downward direction.

(a) Mark in the diagram the direction of load L and effort E.

(b) If the load is raised by 1 m, through what distance will the effort move ?

(c) State the number of strands of tackle supporting the load.

(d) What is the mechanical advantage of the system ?

Discussion

8.	A 100W electric bulb is connected to 220V main power supply. Calculate the strength of electric currect passing through the bulb. If the same bulb is taken to USA where the main power supply is 110V, how much electric current will pass through the bulb when connected to mains?
Answer» A 100W electric bulb is connected to 220V main power supply. Calculate the strength of electric currect passing through the bulb. If the same bulb is taken to USA where the main power supply is 110V, how much electric current will pass through the bulb when connected to mains?

Discussion

9.	(a) Write three characteristics of the image formed by a plane mirror ? (b) How is the position of image related to the position of the object ?
Answer» (a) Write three characteristics of the image formed by a plane mirror ? (b) How is the position of image related to the position of the object ?

9.

(a) Write three characteristics of the image formed by a plane mirror ? (b) How is the position of image related to the position of the object ?

Answer»

(a) Write three characteristics of the image formed by a plane mirror ?

(b) How is the position of image related to the position of the object ?

Discussion

10.	Explain short circuit with some examples
Answer» Explain short circuit with some examples

Discussion

11.	A plane mirror is placed at the bottom of a tank containing a liquid of refractive index π. P is a small object at a height h above the mirror. An observer O- vertically above P, outside the liquid sees P and its image in the mirror. The apparent distance between these two will be
Answer» A plane mirror is placed at the bottom of a tank containing a liquid of refractive index $π$ . P is a small object at a height h above the mirror. An observer O- vertically above P, outside the liquid sees P and its image in the mirror. The apparent distance between these two will be

11.

A plane mirror is placed at the bottom of a tank containing a liquid of refractive index π. P is a small object at a height h above the mirror. An observer O- vertically above P, outside the liquid sees P and its image in the mirror. The apparent distance between these two will be

Answer»

A plane mirror is placed at the bottom of a tank containing a liquid of refractive index $π$ . P is a small object at a height h above the mirror. An observer O- vertically above P, outside the liquid sees P and its image in the mirror. The apparent distance between these two will be

Discussion

12.	How we are able to see the{ northern lights on North Pole}
Answer» How we are able to see the{ northern lights on North Pole}

Discussion

13.	A living state is in
Answer» A living state is in

Discussion

14.	Please explain me the right hand thumb rule.
Answer» Please explain me the right hand thumb rule.

Discussion

15.	(a) Which parts of the eye cause rays of light to converge on the retina ? (b) Which part causes the greatest convergence ? (c) Which part brings the image into sharp focus on the retina ? How does it do this ?
Answer» (a) Which parts of the eye cause rays of light to converge on the retina ? (b) Which part causes the greatest convergence ? (c) Which part brings the image into sharp focus on the retina ? How does it do this ?

Discussion

16.	Which of the following is not produced by the burning of fossil fuels? (a) nitrogen oxides (b) sulphur oxides (c) sodium oxides (d) carbon oxides
Answer» Which of the following is not produced by the burning of fossil fuels? (a) nitrogen oxides (b) sulphur oxides (c) sodium oxides (d) carbon oxides

Discussion

17.	The sound of explosion on the surface of a lake is heard by a boatman 100m away and by a diver 100 m below the point of explosion .Of the two persons who would hear the sound first? Give reason for your answer.
Answer» The sound of explosion on the surface of a lake is heard by a boatman 100m away and by a diver 100 m below the point of explosion .Of the two persons who would hear the sound first? Give reason for your answer.

Discussion

18.	The light ray parallel to the principal axis will:-
Answer» The light ray parallel to the principal axis will:-

18.

The light ray parallel to the principal axis will:-

Answer»

The light ray parallel to the principal axis will:-

Discussion

19.	The stone of a hand flour grinder is provided with a handle near its rim. Give reason.
Answer» The stone of a hand flour grinder is provided with a handle near its rim. Give reason.

Discussion

20.	A electric current which path of electricity is broken is called ________
Answer» A electric current which path of electricity is broken is called ________

Discussion

21.	Chandler saw a rainbow on a rainy day . The third colour from the top of the edge was :
Answer» Chandler saw a rainbow on a rainy day . The third colour from the top of the edge was :

Discussion

22.	Which ray in Electromagnetic Spectrum is present in cosmic radiation?
Answer» Which ray in Electromagnetic Spectrum is present in cosmic radiation?

Discussion

23.	An electric heater has a resistance of 12 ohm and is operated from a 220 v line . If no heat escapes from it, how much time is required to raise the temperature of 40 kg of water from 15 c to 80 celcius?
Answer» An electric heater has a resistance of 12 ohm and is operated from a 220 v line . If no heat escapes from it, how much time is required to raise the temperature of 40 kg of water from 15 c to 80 celcius?

Discussion

24.	Which effect is illustrated by the observation that when a beam of sunlight enters a dusty room, then its path becomes visible to us.
Answer» Which effect is illustrated by the observation that when a beam of sunlight enters a dusty room, then its path becomes visible to us.

Discussion

25.	A bus starts from the stop and takes 50 seconds to attain the speed of 10ms. If the mass of the bus along with the passengers is 10000 kg, calculate the force applied (in N) by the engine of bus to push the bus to the speed of 10ms. ___
Answer» A bus starts from the stop and takes 50 seconds to attain the speed of 10 $\frac{m}{s}$ . If the mass of the bus along with the passengers is 10000 kg, calculate the force applied (in N) by the engine of bus to push the bus to the speed of 10 $\frac{m}{s}$ . ___

Discussion

26.	What is a lens?
Answer» What is a lens?

Discussion

27.	Power voltage rating of an electric bulb is 100 W 200 V, current drawn by it will be
Answer» Power voltage rating of an electric bulb is 100 W 200 V, current drawn by it will be

Discussion

28.	If a ray of light doesn't enter rarer medium and reflects back to the denser medium. This phenomenon is called as:
Answer» If a ray of light doesn't enter rarer medium and reflects back to the denser medium. This phenomenon is called as:

Discussion

29.	The Galvanometer will show deflection in which of the following cases?
Answer» The Galvanometer will show deflection in which of the following cases?

Discussion

30.	What is the lateral shift surface in the light ray refracted by a rectangular glad slab? On what factors does it depend ?
Answer» What is the lateral shift surface in the light ray refracted by a rectangular glad slab? On what factors does it depend ?

Discussion

31.	State two differences between a conductor and an insulator of electricity.
Answer» State two differences between a conductor and an insulator of electricity.

Discussion

32.	Name a liquid which has the highest specific heat capacity.
Answer» Name a liquid which has the highest specific heat capacity.

Discussion

33.	If all living things extinct except Humans,Plant and Microorganisms then humans can survive easily then why should we conserve other animals?
Answer» If all living things extinct except Humans,Plant and Microorganisms then humans can survive easily then why should we conserve other animals?

Discussion

34.	Define lateral displacement.
Answer» Define lateral displacement.

Discussion

35.	What kind of lens is used in spectacles for short -sighted?
Answer» What kind of lens is used in spectacles for short -sighted?

Discussion

36.	Q17. Consider the following statements. 1. Neutrinos are subatomic particles with high mass but no charge. 2. Mathikettan Shola National park in Kerala is situated close to the India based Neutrino Observatory. Which of the above statement(s) is/are correct?
Answer» Q17. Consider the following statements. 1. Neutrinos are subatomic particles with high mass but no charge. 2. Mathikettan Shola National park in Kerala is situated close to the India based Neutrino Observatory. Which of the above statement(s) is/are correct?

36.

Q17. Consider the following statements. 1. Neutrinos are subatomic particles with high mass but no charge. 2. Mathikettan Shola National park in Kerala is situated close to the India based Neutrino Observatory. Which of the above statement(s) is/are correct?

Answer»

Q17. Consider the following statements.

1. Neutrinos are subatomic particles with high mass but no charge.

2. Mathikettan Shola National park in Kerala is situated close to the India based Neutrino Observatory.

Which of the above statement(s) is/are correct?

Discussion

37.	Why current is a scalar quantity?
Answer» Why current is a scalar quantity?

Discussion

38.	Like charges repel. what about protons in a nucleus which have positive charge but they don't repel
Answer» Like charges repel. what about protons in a nucleus which have positive charge but they don't repel

Discussion

39.	A spherical mirror produces an image of magnification -1 on a screen placed at a distance of 50 cm from the mirror (a) Write the type of mirror. (b) Find the distance of the image from the object. (c) What is the focal length of the mirror? (d) Draw the ray diagram to show the image formation in this case.
Answer» A spherical mirror produces an image of magnification -1 on a screen placed at a distance of 50 cm from the mirror (a) Write the type of mirror. (b) Find the distance of the image from the object. (c) What is the focal length of the mirror? (d) Draw the ray diagram to show the image formation in this case.

Discussion

40.	Suppose the gravitational force between two spheres is 30N. If the magnitude of each mass doubles, what is the force between the masses?
Answer» Suppose the gravitational force between two spheres is $30 N$ . If the magnitude of each mass doubles, what is the force between the masses?

Discussion

41.	Which of the following states suffers from land degradation due to water logging as a result of over irrigation?
Answer» Which of the following states suffers from land degradation due to water logging as a result of over irrigation?

Discussion

42.	Ram has an LED of resistance 10 Ω which will only light up if the current provided is exactly 1A. He also has 10 two volt cells. Find out how many cells will Ram need to light up the LED?
Answer» Ram has an LED of resistance 10 Ω which will only light up if the current provided is exactly 1A. He also has 10 two volt cells. Find out how many cells will Ram need to light up the LED?

Discussion

43.	A car accelerates from rest to speed of 100 m/s in 10 seconds. If the mass of the car is 50 kg, then power developed by the engine is:
Answer» A car accelerates from rest to speed of 100 m/s in 10 seconds. If the mass of the car is 50 kg, then power developed by the engine is:

Discussion

44.	What are the different types of wire in the supply?
Answer» What are the different types of wire in the supply?

Discussion

45.	Which of the following makes the electronic waste more harmful in nature?
Answer» Which of the following makes the electronic waste more harmful in nature?

45.

Which of the following makes the electronic waste more harmful in nature?

Answer»

Which of the following makes the electronic waste more harmful in nature?

Discussion

46.	A pendulum with bob of mass m is oscillating on either side from its resting position A between the extremes B and C at a vertical height h above A.What is the kinetic energy K and potential energy U when the pendulum is at positions (i) A,(ii) B, and (iii) C?
Answer» A pendulum with bob of mass m is oscillating on either side from its resting position A between the extremes B and C at a vertical height h above A.What is the kinetic energy K and potential energy U when the pendulum is at positions (i) A,(ii) B, and (iii) C?

Discussion

47.	A U-shaped wire is placed before a concave mirror having radius of curvature 20 cm as shown in figure. Find the total length of the image.
Answer» A U-shaped wire is placed before a concave mirror having radius of curvature 20 cm as shown in figure. Find the total length of the image.

47.

A U-shaped wire is placed before a concave mirror having radius of curvature 20 cm as shown in figure. Find the total length of the image.

Answer»

A U-shaped wire is placed before a concave mirror having radius of curvature 20 cm as shown in figure. Find the total length of the image.

Discussion

48.	State two conditions for a body, acted upon by several forces, to be in equilibrium.
Answer» State two conditions for a body, acted upon by several forces, to be in equilibrium.

Discussion

49.	A lens which has two spherical surfaces both curved inside is called ___
Answer» A lens which has two spherical surfaces both curved inside is called ___

Discussion

50.	A 12 W resistor is connected in series with a cell of emf 1.5 V and negligible internal resistance (or terminal voltage 1.5 V). How must a 4 W resistor be introduced in the circuit, so that the current drawn from the cell is 0.5 A?
Answer» A 12 W resistor is connected in series with a cell of emf 1.5 V and negligible internal resistance (or terminal voltage 1.5 V). How must a 4 W resistor be introduced in the circuit, so that the current drawn from the cell is 0.5 A?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

If a positively charged object has an affinity to attract another body, then, what charge does the other body possesses.

Which of the following are the disadvantages of hydel power generation?

State where an object must be placed so that the image formed by a concave mirror is: (a) erect and virtual. (b) at infinity. (c) the same size the object.

In a ring system, all the appliances receive the same voltage. But each appliance has a different voltage. What controls this?

A 100W electric bulb is connected to 220V main power supply. Calculate the strength of electric currect passing through the bulb. If the same bulb is taken to USA where the main power supply is 110V, how much electric current will pass through the bulb when connected to mains?

(a) Write three characteristics of the image formed by a plane mirror ? (b) How is the position of image related to the position of the object ?

Explain short circuit with some examples

A plane mirror is placed at the bottom of a tank containing a liquid of refractive index π. P is a small object at a height h above the mirror. An observer O- vertically above P, outside the liquid sees P and its image in the mirror. The apparent distance between these two will be

How we are able to see the{ northern lights on North Pole}

A living state is in

Please explain me the right hand thumb rule.

(a) Which parts of the eye cause rays of light to converge on the retina ? (b) Which part causes the greatest convergence ? (c) Which part brings the image into sharp focus on the retina ? How does it do this ?

Which of the following is not produced by the burning of fossil fuels? (a) nitrogen oxides (b) sulphur oxides (c) sodium oxides (d) carbon oxides

The sound of explosion on the surface of a lake is heard by a boatman 100m away and by a diver 100 m below the point of explosion .Of the two persons who would hear the sound first? Give reason for your answer.

The light ray parallel to the principal axis will:-

The stone of a hand flour grinder is provided with a handle near its rim. Give reason.

A electric current which path of electricity is broken is called ________

Chandler saw a rainbow on a rainy day . The third colour from the top of the edge was :

Which ray in Electromagnetic Spectrum is present in cosmic radiation?

An electric heater has a resistance of 12 ohm and is operated from a 220 v line . If no heat escapes from it, how much time is required to raise the temperature of 40 kg of water from 15 c to 80 celcius?

Which effect is illustrated by the observation that when a beam of sunlight enters a dusty room, then its path becomes visible to us.

A bus starts from the stop and takes 50 seconds to attain the speed of 10ms. If the mass of the bus along with the passengers is 10000 kg, calculate the force applied (in N) by the engine of bus to push the bus to the speed of 10ms. ___

What is a lens?

Power voltage rating of an electric bulb is 100 W 200 V, current drawn by it will be

If a ray of light doesn't enter rarer medium and reflects back to the denser medium. This phenomenon is called as:

The Galvanometer will show deflection in which of the following cases?

What is the lateral shift surface in the light ray refracted by a rectangular glad slab? On what factors does it depend ?

State two differences between a conductor and an insulator of electricity.

Name a liquid which has the highest specific heat capacity.

If all living things extinct except Humans,Plant and Microorganisms then humans can survive easily then why should we conserve other animals?

Define lateral displacement.

What kind of lens is used in spectacles for short -sighted?

Q17. Consider the following statements. 1. Neutrinos are subatomic particles with high mass but no charge. 2. Mathikettan Shola National park in Kerala is situated close to the India based Neutrino Observatory. Which of the above statement(s) is/are correct?

Why current is a scalar quantity?

Like charges repel. what about protons in a nucleus which have positive charge but they don't repel

Suppose the gravitational force between two spheres is 30N. If the magnitude of each mass doubles, what is the force between the masses?

Which of the following states suffers from land degradation due to water logging as a result of over irrigation?

Ram has an LED of resistance 10 Ω which will only light up if the current provided is exactly 1A. He also has 10 two volt cells. Find out how many cells will Ram need to light up the LED?

A car accelerates from rest to speed of 100 m/s in 10 seconds. If the mass of the car is 50 kg, then power developed by the engine is:

What are the different types of wire in the supply?

Which of the following makes the electronic waste more harmful in nature?

A pendulum with bob of mass m is oscillating on either side from its resting position A between the extremes B and C at a vertical height h above A.What is the kinetic energy K and potential energy U when the pendulum is at positions (i) A,(ii) B, and (iii) C?

A U-shaped wire is placed before a concave mirror having radius of curvature 20 cm as shown in figure. Find the total length of the image.

State two conditions for a body, acted upon by several forces, to be in equilibrium.

A lens which has two spherical surfaces both curved inside is called ___

A 12 W resistor is connected in series with a cell of emf 1.5 V and negligible internal resistance (or terminal voltage 1.5 V). How must a 4 W resistor be introduced in the circuit, so that the current drawn from the cell is 0.5 A?