16569 + Interview Questions in Physics

1.	What will happen if we keep a compass at the middle of the bar magnet?
Answer» What will happen if we keep a compass at the middle of the bar magnet?

Discussion

2.	Express Wh in its SI units.
Answer» Express Wh in its SI units.

Discussion

3.	When viewed in green light, a flag that is red and green will appear to be :
Answer» When viewed in green light, a flag that is red and green will appear to be :

Discussion

4.	What are the various factors which we should keep in mind while choosing a source of energy ?
Answer» What are the various factors which we should keep in mind while choosing a source of energy ?

Discussion

5.	Which of the following does not utilize the concept of couple?
Answer» Which of the following does not utilize the concept of couple?

Discussion

6.	(a) State the relationship between mechanical advantage, velocity ratio and efficiency. (b) Name the term that will not change for a machine of a given design.
Answer» (a) State the relationship between mechanical advantage, velocity ratio and efficiency. (b) Name the term that will not change for a machine of a given design.

6.

(a) State the relationship between mechanical advantage, velocity ratio and efficiency. (b) Name the term that will not change for a machine of a given design.

Answer»

(a) State the relationship between mechanical advantage, velocity ratio and efficiency.

(b) Name the term that will not change for a machine of a given design.

Discussion

7.	For the screw gauge shown below, the least count is 0.01 mm. What is the zero correction?
Answer» For the screw gauge shown below, the least count is 0.01 mm. What is the zero correction?

7.

For the screw gauge shown below, the least count is 0.01 mm. What is the zero correction?

Answer»

For the screw gauge shown below, the least count is 0.01 mm. What is the zero correction?

Discussion

8.	A plane mirror and an object approach each other with speeds of 5m/s and 10 m/s respectively. The speed of the image will be
Answer» A plane mirror and an object approach each other with speeds of 5m/s and 10 m/s respectively. The speed of the image will be

Discussion

9.	__refers to efforts taken to reduce energy consumption in order to preserve resources for the future and reduce environmental pollution.
Answer» __refers to efforts taken to reduce energy consumption in order to preserve resources for the future and reduce environmental pollution.

Discussion

10.	Biogas is a mixture of:
Answer» Biogas is a mixture of:

Discussion

11.	Which of the following is not a property of magnetic field lines?
Answer» Which of the following is not a property of magnetic field lines?

Discussion

12.	In a village, farmers started cultivating crops all around a lake which was always filled with water. They added a lot of materials W to the soil in their fields to increase the yield of crops. Soon they found that the whole surface of the water in the lake was covered with a green layer made up of tiny organisms X. After some time, the fish present in the lake started dying in large numbers because they could not get sufficient Y due to a process A which had occurred in lake water and drained out all the Y present in the water of the lake. (a) What do you think materials W is? (b) Name (i) X, and (ii) Y. (c) What is the process Z known as? (d) What happens during the process A which uses up all the Y present in lake water? (e) What does this example tell us about the use of materials like W?
Answer» In a village, farmers started cultivating crops all around a lake which was always filled with water. They added a lot of materials W to the soil in their fields to increase the yield of crops. Soon they found that the whole surface of the water in the lake was covered with a green layer made up of tiny organisms X. After some time, the fish present in the lake started dying in large numbers because they could not get sufficient Y due to a process A which had occurred in lake water and drained out all the Y present in the water of the lake. (a) What do you think materials W is? (b) Name (i) X, and (ii) Y. (c) What is the process Z known as? (d) What happens during the process A which uses up all the Y present in lake water? (e) What does this example tell us about the use of materials like W?

Discussion

13.	A 2 kW heater, a 200 W TV and three 100 W lamps are all switched on from 6 p.m. to 10 p.m. What is the total cost at Rs. 5.50 per kWh?
Answer» A 2 kW heater, a 200 W TV and three 100 W lamps are all switched on from 6 p.m. to 10 p.m. What is the total cost at Rs. 5.50 per kWh?

Discussion

14.	Which of the following are correct with respect to carbon monoxide? (i) It is released due to incomplete combustion of fuels. (ii) It does not affect humans. (iii) It is a poisonous gas. (iv) It reduces oxygen-carrying capacity of the blood. (v) It is released from vehicles.
Answer» Which of the following are correct with respect to carbon monoxide? (i) It is released due to incomplete combustion of fuels. (ii) It does not affect humans. (iii) It is a poisonous gas. (iv) It reduces oxygen-carrying capacity of the blood. (v) It is released from vehicles.

Discussion

15.	A simple pendulum of length l and bob mass m is displaced from its equilibrium position O to a position P so that the height of P above O is h and is released. What is the tension in the string when the bob passes through the equilibrium position O? Neglect friction. V is the velocity of the bob at O
Answer» A simple pendulum of length $l$ and bob mass m is displaced from its equilibrium position O to a position P so that the height of P above O is $h$ and is released. What is the tension in the string when the bob passes through the equilibrium position O? Neglect friction. V is the velocity of the bob at O

Discussion

16.	Question 11 A concave lens of focal length 15 cm forms an image 10 cm from the lens. How far is the object placed from the lens? Draw the ray diagram.
Answer» Question 11 A concave lens of focal length 15 cm forms an image 10 cm from the lens. How far is the object placed from the lens? Draw the ray diagram.

Discussion

17.	Light rays get refracted ______ when they pass from air to glass prism.
Answer» Light rays get refracted ______ when they pass from air to glass prism.

Discussion

18.	When live wire comes in direct contact with the neutral wire the very high current flows through the circuit producing large amount of heat. This phenomenon is called
Answer» When live wire comes in direct contact with the neutral wire the very high current flows through the circuit producing large amount of heat. This phenomenon is called

Discussion

19.	A ball of mass 10g is dropped from a certain height. At 50m height its KE is equal to its PE. Calculate its PE at the topmost point and TE midway.
Answer» A ball of mass 10g is dropped from a certain height. At 50m height its KE is equal to its PE. Calculate its PE at the topmost point and TE midway.

Discussion

20.	State one reason why is mechanical advantage less than the velocity ratio for an actual machine.
Answer» State one reason why is mechanical advantage less than the velocity ratio for an actual machine.

Discussion

21.	What are non-conventional sources of energy?
Answer» What are non-conventional sources of energy?

Discussion

22.	An ammeter has 20 divisions between 0 and mark 2 on its scale. Find the least count of the ammeter.
Answer» An ammeter has 20 divisions between 0 and mark 2 on its scale. Find the least count of the ammeter.

Discussion

23.	What is the ultimate source of energy on the earth?
Answer» What is the ultimate source of energy on the earth?

Discussion

24.	why does the red light is the fastest
Answer» why does the red light is the fastest

Discussion

25.	In which direction should a boy apply the force, in order to stop a trolley sliding downward on a slope?
Answer» In which direction should a boy apply the force, in order to stop a trolley sliding downward on a slope?

Discussion

26.	The 'Narmada Bachao Andolan' protests are against raising the height of which dam?
Answer» The 'Narmada Bachao Andolan' protests are against raising the height of which dam?

Discussion

27.	Given that i is angle of incidence and r is angle of refraction for a light ray at a boundary, the correct expression for Snell's Law is:
Answer» Given that i is angle of incidence and r is angle of refraction for a light ray at a boundary, the correct expression for Snell's Law is:

Discussion

28.	Which of these are fossils fuels?
Answer» Which of these are fossils fuels?

Discussion

29.	A student traces the path of a ray of light through a triangular glass prism for different values of angle of incidence. On analysing the ray diagrams, which one of the following conclusions is he likely to draw? (a) The emergent ray is parallel to the incident ray. (b) The emergent ray bends at an angle to the direction of the incident ray. (c) The emergent ray and the refracted ray are at right angles to each other. (d) The emergent ray is perpendicular to the incident ray.
Answer» A student traces the path of a ray of light through a triangular glass prism for different values of angle of incidence. On analysing the ray diagrams, which one of the following conclusions is he likely to draw? (a) The emergent ray is parallel to the incident ray. (b) The emergent ray bends at an angle to the direction of the incident ray. (c) The emergent ray and the refracted ray are at right angles to each other. (d) The emergent ray is perpendicular to the incident ray.

Discussion

30.	Convex lens does always forms enlarge image?
Answer» Convex lens does always forms enlarge image?

Discussion

31.	The potential difference applied to an X -ray tube is 5 kV and the current through it is 3.2 mA. Then the number of the electrons striking the target per second is
Answer» The potential difference applied to an X -ray tube is 5 kV and the current through it is 3.2 mA. Then the number of the electrons striking the target per second is

Discussion

32.	An electron carries a ___ charge and a proton carries a ___ charge.
Answer» An electron carries a ___ charge and a proton carries a ___ charge.

Discussion

33.	A wire is cut into three equal parts and then connected in parallel with the same source .How will it's resistance and resistivity get affected
Answer» A wire is cut into three equal parts and then connected in parallel with the same source .How will it's resistance and resistivity get affected

Discussion

34.	Figure 8.14 shows a circuit diagram having a battery of 24 V and negligible internal resistance. Calculate the: (a) reading of ammeter (b) reading of V1,V2 and V3. [5 MARKS]
Answer» Figure 8.14 shows a circuit diagram having a battery of 24 V and negligible internal resistance. Calculate the: (a) reading of ammeter (b) reading of $V_{1}, V_{2}$ and $V_{3}$ . [5 MARKS]

Discussion

35.	Two light bulbs P and Q are identical in all aspects, except that P's filament is thicker than Q's. If the same potential difference is applied to each, then:
Answer» Two light bulbs P and Q are identical in all aspects, except that P's filament is thicker than Q's. If the same potential difference is applied to each, then:

Discussion

36.	A pulley system has velocity ratio of 3. If it efficiency is 75%, calculate the maximum load it can raise using an effort of 30 N. [Assume 1 kgf = 10N, 1 gf = 1000 dynes]
Answer» A pulley system has velocity ratio of 3. If it efficiency is 75%, calculate the maximum load it can raise using an effort of 30 N. [Assume 1 kgf = 10N, 1 gf = 1000 dynes]

Discussion

37.	I want worksheet for current electricity for practice
Answer» I want worksheet for current electricity for practice

Discussion

38.	The dimensions of Universal Gravitational constant are
Answer» The dimensions of Universal Gravitational constant are

Discussion

39.	Fig. 9.26 below shows two conductors A and B. Their charges and potentials are given in the diagram. State the direction of (i) flow of electrons, and (ii) flow of current, when both the conductors are joined by a metal wire.
Answer» Fig. 9.26 below shows two conductors A and B. Their charges and potentials are given in the diagram. State the direction of (i) flow of electrons, and (ii) flow of current, when both the conductors are joined by a metal wire.

39.

Fig. 9.26 below shows two conductors A and B. Their charges and potentials are given in the diagram. State the direction of (i) flow of electrons, and (ii) flow of current, when both the conductors are joined by a metal wire.

Answer»

Fig. 9.26 below shows two conductors A and B. Their charges and potentials are given in the diagram. State the direction of (i) flow of electrons, and (ii) flow of current, when both the conductors are joined by a metal wire.

Discussion

40.	Two bulbs marked 200 W, 250 V and 100 W, 250 V are joined in series to a 250 V supply. Power consumed in the circuit is
Answer» Two bulbs marked 200 W, 250 V and 100 W, 250 V are joined in series to a 250 V supply. Power consumed in the circuit is

Discussion

41.	Name the three characteristics of a musical sound.
Answer» Name the three characteristics of a musical sound.

Discussion

42.	A lens which has two spherical surfaces both bulging inside is called ___.
Answer» A lens which has two spherical surfaces both bulging inside is called ___.

Discussion

43.	Why do light waves not deviate in electric and magnetic fields?
Answer» Why do light waves not deviate in electric and magnetic fields?

Discussion

44.	In a solid AB having the NaCl structure, A atom occupies the cornerns of the cubic unit cell. If all the face-centred atoms along one of the axes are removed, then the resultant stoichiometry of the solid is (IIT-JEE, 2001)
Answer» In a solid AB having the NaCl structure, A atom occupies the cornerns of the cubic unit cell. If all the face-centred atoms along one of the axes are removed, then the resultant stoichiometry of the solid is (IIT-JEE, 2001)

Discussion

45.	How was lodestone (Magnet) invented ?
Answer» How was lodestone (Magnet) invented ?

Discussion

46.	Where is the near point of a person suffering from hypermetropia (or long-sightedness) ?
Answer» Where is the near point of a person suffering from hypermetropia (or long-sightedness) ?

Discussion

47.	What are the units which are used to measure distance in space? Explain them briefly.
Answer» What are the units which are used to measure distance in space? Explain them briefly.

Discussion

48.	When light enters from air to glass the angle of incidence and refraction in air and glass are 45° and 30° respectively. Find the refractive index of glass.
Answer» When light enters from air to glass the angle of incidence and refraction in air and glass are 45° and 30° respectively. Find the refractive index of glass.

Discussion

49.	Calculate the net moment on a rod of length 5m & mass 3000 g pivoted at 3 m from an end, if 2 weights of 500 gf & 800 gf are placed at 2 m & 4.5 m from the same end.
Answer» Calculate the net moment on a rod of length 5m & mass 3000 g pivoted at 3 m from an end, if 2 weights of 500 gf & 800 gf are placed at 2 m & 4.5 m from the same end.

Discussion

50.	An electric bulb draws 1.2 A current at 6.0 V. Find the resistance of filament of bulb while glowing.
Answer» An electric bulb draws 1.2 A current at 6.0 V. Find the resistance of filament of bulb while glowing.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What will happen if we keep a compass at the middle of the bar magnet?

Express Wh in its SI units.

When viewed in green light, a flag that is red and green will appear to be :

What are the various factors which we should keep in mind while choosing a source of energy ?

Which of the following does not utilize the concept of couple?

(a) State the relationship between mechanical advantage, velocity ratio and efficiency. (b) Name the term that will not change for a machine of a given design.

For the screw gauge shown below, the least count is 0.01 mm. What is the zero correction?

A plane mirror and an object approach each other with speeds of 5m/s and 10 m/s respectively. The speed of the image will be

__refers to efforts taken to reduce energy consumption in order to preserve resources for the future and reduce environmental pollution.

Biogas is a mixture of:

Which of the following is not a property of magnetic field lines?

A 2 kW heater, a 200 W TV and three 100 W lamps are all switched on from 6 p.m. to 10 p.m. What is the total cost at Rs. 5.50 per kWh?

Which of the following are correct with respect to carbon monoxide? (i) It is released due to incomplete combustion of fuels. (ii) It does not affect humans. (iii) It is a poisonous gas. (iv) It reduces oxygen-carrying capacity of the blood. ​(v) It is released from vehicles.

Question 11 A concave lens of focal length 15 cm forms an image 10 cm from the lens. How far is the object placed from the lens? Draw the ray diagram.

Light rays get refracted ______ when they pass from air to glass prism.

When live wire comes in direct contact with the neutral wire the very high current flows through the circuit producing large amount of heat. This phenomenon is called

A ball of mass 10g is dropped from a certain height. At 50m height its KE is equal to its PE. Calculate its PE at the topmost point and TE midway.

State one reason why is mechanical advantage less than the velocity ratio for an actual machine.

What are non-conventional sources of energy?

An ammeter has 20 divisions between 0 and mark 2 on its scale. Find the least count of the ammeter.

What is the ultimate source of energy on the earth?

why does the red light is the fastest

In which direction should a boy apply the force, in order to stop a trolley sliding downward on a slope?

The 'Narmada Bachao Andolan' protests are against raising the height of which dam?

Given that i is angle of incidence and r is angle of refraction for a light ray at a boundary, the correct expression for Snell's Law is:

Which of these are fossils fuels?

Convex lens does always forms enlarge image?

The potential difference applied to an X -ray tube is 5 kV and the current through it is 3.2 mA. Then the number of the electrons striking the target per second is

An electron carries a ___ charge and a proton carries a ___ charge.

A wire is cut into three equal parts and then connected in parallel with the same source .How will it's resistance and resistivity get affected

Figure 8.14 shows a circuit diagram having a battery of 24 V and negligible internal resistance. Calculate the: (a) reading of ammeter (b) reading of V1,V2 and V3. [5 MARKS]

Two light bulbs P and Q are identical in all aspects, except that P's filament is thicker than Q's. If the same potential difference is applied to each, then:

A pulley system has velocity ratio of 3. If it efficiency is 75%, calculate the maximum load it can raise using an effort of 30 N. [Assume 1 kgf = 10N, 1 gf = 1000 dynes]

I want worksheet for current electricity for practice

The dimensions of Universal Gravitational constant are

Fig. 9.26 below shows two conductors A and B. Their charges and potentials are given in the diagram. State the direction of (i) flow of electrons, and (ii) flow of current, when both the conductors are joined by a metal wire.

Two bulbs marked 200 W, 250 V and 100 W, 250 V are joined in series to a 250 V supply. Power consumed in the circuit is

Name the three characteristics of a musical sound.

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

Why do light waves not deviate in electric and magnetic fields?

In a solid AB having the NaCl structure, A atom occupies the cornerns of the cubic unit cell. If all the face-centred atoms along one of the axes are removed, then the resultant stoichiometry of the solid is (IIT-JEE, 2001)

How was lodestone (Magnet) invented ?

Where is the near point of a person suffering from hypermetropia (or long-sightedness) ?

What are the units which are used to measure distance in space? Explain them briefly.

When light enters from air to glass the angle of incidence and refraction in air and glass are 45° and 30° respectively. Find the refractive index of glass.

Calculate the net moment on a rod of length 5m &amp; mass 3000 g pivoted at 3 m from an end, if 2 weights of 500 gf &amp; 800 gf are placed at 2 m &amp; 4.5 m from the same end.

An electric bulb draws 1.2 A current at 6.0 V. Find the resistance of filament of bulb while glowing.

Which of the following are correct with respect to carbon monoxide? (i) It is released due to incomplete combustion of fuels. (ii) It does not affect humans. (iii) It is a poisonous gas. (iv) It reduces oxygen-carrying capacity of the blood. (v) It is released from vehicles.

An electron carries a _ charge and a proton carries a _ charge.

Calculate the net moment on a rod of length 5m & mass 3000 g pivoted at 3 m from an end, if 2 weights of 500 gf & 800 gf are placed at 2 m & 4.5 m from the same end.