9478 + Interview Questions in Physics Page 128 InterviewSolution

6351.	When we press the bulb of a dropper with its nozzle kept in water, air in the dropper is seen to escape in the form of bubbles.Once we release the pressure on the bulb, water gets filled in the dropper. The rise of water in the dropper is due to : (a) pressure of water (b) gravity of the earth (c) shape of rubber bulb (d) atmospheric pressure
Answer» When we press the bulb of a dropper with its nozzle kept in water, air in the dropper is seen to escape in the form of bubbles.Once we release the pressure on the bulb, water gets filled in the dropper. The rise of water in the dropper is due to : (a) pressure of water (b) gravity of the earth (c) shape of rubber bulb (d) atmospheric pressure

6351.

When we press the bulb of a dropper with its nozzle kept in water, air in the dropper is seen to escape in the form of bubbles.Once we release the pressure on the bulb, water gets filled in the dropper. The rise of water in the dropper is due to : (a) pressure of water (b) gravity of the earth (c) shape of rubber bulb (d) atmospheric pressure

Answer»

When we press the bulb of a dropper with its nozzle kept in water, air in the dropper is seen to escape in the form of bubbles.Once we release the pressure on the bulb, water gets filled in the dropper.

The rise of water in the dropper is due to :
(a) pressure of water (b) gravity of the earth
(c) shape of rubber bulb (d) atmospheric pressure

Discussion

6352.	An effort of 240 N overcome a useful load 1000 N when applied to a block and system of pulleys; such that the weight movable block and friction is 200 N. What is the efficiency of the system?
Answer» An effort of 240 N overcome a useful load 1000 N when applied to a block and system of pulleys; such that the weight movable block and friction is 200 N. What is the efficiency of the system?

Discussion

6353.	Frictional force depends on
Answer» Frictional force depends on

Discussion

6354.	What should be the minimum time gap between two sounds to be perceptible by the human ear?
Answer» What should be the minimum time gap between two sounds to be perceptible by the human ear?

Discussion

6355.	A force has been applied on a ball when it is:
Answer» A force has been applied on a ball when it is:

Discussion

6356.	An object experiences a net non - zero force. Is it possible for the object to move with a constant speed along a straight line?
Answer» An object experiences a net non - zero force. Is it possible for the object to move with a constant speed along a straight line?

Discussion

6357.	What is neutral buoyancy ?
Answer» What is neutral buoyancy ?

Discussion

6358.	State two effects of a force when applied to a body.
Answer» State two effects of a force when applied to a body.

Discussion

6359.	Match items in column A with one or more items in column B. A B (i) Inner planets (a) Saturn (ii) Outer planets (b) Pole star (iii) Constellation (c) Great Bear (iv) Satellite of the Earth (d) Moon (e) Earth (f) Orion (g) Mars
Answer» Match items in column A with one or more items in column B. A B (i) Inner planets (a) Saturn (ii) Outer planets (b) Pole star (iii) Constellation (c) Great Bear (iv) Satellite of the Earth (d) Moon (e) Earth (f) Orion (g) Mars

6359.

Match items in column A with one or more items in column B. A B (i) Inner planets (a) Saturn (ii) Outer planets (b) Pole star (iii) Constellation (c) Great Bear (iv) Satellite of the Earth (d) Moon (e) Earth (f) Orion (g) Mars

Answer»

Match items in column A with one or more items in column B.

A B

(i) Inner planets (a) Saturn

(ii) Outer planets (b) Pole star

(iii) Constellation (c) Great Bear

(iv) Satellite of the Earth (d) Moon

(e) Earth

(f) Orion

(g) Mars

Discussion

6360.	The S.I. unit of speed is _______.
Answer» The S.I. unit of speed is _______.

Discussion

6361.	The waveform representation converts ____
Answer» The waveform representation converts ____

Discussion

6362.	If electrodes were immersed in water, and a current was passed, is the change taking place in the solution a chemical change? Give reason. [ 3 MARKS ]
Answer» If electrodes were immersed in water, and a current was passed, is the change taking place in the solution a chemical change? Give reason. [ 3 MARKS ]

Discussion

6363.	If an object is placed between focus and centre of curvature of a concave mirror then where will be the image formed?
Answer» If an object is placed between focus and centre of curvature of a concave mirror then where will be the image formed?

Discussion

6364.	What is the amount of work to be done on a car of mass 1000 kg to increase its velocity from 10 kmhr−1 to 20 kmhr−1?
Answer» What is the amount of work to be done on a car of mass $1000 kg$ to increase its velocity from $10 k m h r^{- 1}$ to $20 k m h r^{- 1}$ ?

Discussion

6365.	What is the S.I. unit of pressure?
Answer» What is the S.I. unit of pressure?

Discussion

6366.	Suppose a red coloured ball is placed in the blue light what colour will you observe
Answer» Suppose a red coloured ball is placed in the blue light what colour will you observe

Discussion

6367.	Ultrasound is not used to:
Answer» Ultrasound is not used to:

Discussion

6368.	Question 2 In the figure, a boy is shown pushing the box from right to left. The force of friction will act on the box. (a) from right to left (←) (b) from left to right (→) (c) vertically downwards (↓) (d) vertically upwards (↑)
Answer» Question 2 In the figure, a boy is shown pushing the box from right to left. The force of friction will act on the box. (a) from right to left $(\leftarrow)$ (b) from left to right $(\to)$ (c) vertically downwards $(↓)$ (d) vertically upwards $(↑)$

Discussion

6369.	What physical changes may one observe upon passage of an electric current through a conducting solution?
Answer» What physical changes may one observe upon passage of an electric current through a conducting solution?

Discussion

6370.	Which produces sound of a higher pitch? a drum or a whistle? why?
Answer» Which produces sound of a higher pitch? a drum or a whistle? why?

Discussion

6371.	True or False: The no. of protons and the no. of electrons in an atom of an element is always the same.
Answer» True or False: The no. of protons and the no. of electrons in an atom of an element is always the same.

Discussion

6372.	PRESBYOPIA
Answer» PRESBYOPIA

Discussion

6373.	What is an electrode?
Answer» What is an electrode?

Discussion

6374.	HELLO SIR, What is the time period of an object which it oscillates 120 times in a minute? thank you Khushi
Answer» HELLO SIR, What is the time period of an object which it oscillates 120 times in a minute? thank you Khushi

6374.

HELLO SIR, What is the time period of an object which it oscillates 120 times in a minute? thank you Khushi

Answer»

HELLO SIR,

What is the time period of an object which it oscillates 120 times in a minute?

thank you

Khushi

Discussion

6375.	What do you mean by coefficient of friction?explain
Answer» What do you mean by coefficient of friction?explain

Discussion

6376.	Name a man made heavenly body?
Answer» Name a man made heavenly body?

Discussion

6377.	What is visualization of sound ??
Answer» What is visualization of sound ??

Discussion

6378.	How many images of a candle will be formed if it is placed between two parallel plane mirrors separated by 40 cm?
Answer» How many images of a candle will be formed if it is placed between two parallel plane mirrors separated by 40 cm?

Discussion

6379.	Why are orbit of plants elliptical in shape??why not any other shape like rectangle??
Answer» Why are orbit of plants elliptical in shape??why not any other shape like rectangle??

Discussion

6380.	A wheel of diameter 2 m is shown in the figure. A force F = 2 N is applied at B in the direction shown in figure. Calculate the moment of force about (i) centre O, and (ii) point A.
Answer» A wheel of diameter 2 m is shown in the figure. A force F = 2 N is applied at B in the direction shown in figure. Calculate the moment of force about (i) centre O, and (ii) point A.

6380.

A wheel of diameter 2 m is shown in the figure. A force F = 2 N is applied at B in the direction shown in figure. Calculate the moment of force about (i) centre O, and (ii) point A.

Answer»

A wheel of diameter 2 m is shown in the figure. A force F = 2 N is applied at B in the direction shown in figure. Calculate the moment of force about (i) centre O, and (ii) point A.

Discussion

6381.	How will you use a pith ball electroscope to find out whether the charge on a charged body is positive or negative?
Answer» How will you use a pith ball electroscope to find out whether the charge on a charged body is positive or negative?

Discussion

6382.	Unit of pressure and thrust respectively is?
Answer» Unit of pressure and thrust respectively is?

Discussion

6383.	74 Which of the followig represent correct values for the normal atmospheric pressure ? A. 101.3 kilopascals B.76 mm of mercury C.101.3 pascals D.76 cm of mercury (a) A and B (b) B and C (c) A and D (d) B and D
Answer» 74 Which of the followig represent correct values for the normal atmospheric pressure ? A. 101.3 kilopascals B.76 mm of mercury C.101.3 pascals D.76 cm of mercury (a) A and B (b) B and C (c) A and D (d) B and D

Discussion

6384.	Acidified water is electrolysed by using carbon electrodes. What is produced at : (a) positive carbon electrode? (b) negative carbon electrode?
Answer» Acidified water is electrolysed by using carbon electrodes. What is produced at : (a) positive carbon electrode? (b) negative carbon electrode?

Discussion

6385.	In an activity to check the conduction of electricity through two liquids labelled A and B by using a bulb, it is observed that the bulb glows brightly for liquid A while it glows very dimly for liquid B. (a) Liquid A is a better conductor than liquid B. (b) Liquid B is a better conductor than liquid A. (c) Both liquids are equally conducting. (d) Conducting properties of liquids cannot be compared in this manner.
Answer» In an activity to check the conduction of electricity through two liquids labelled A and B by using a bulb, it is observed that the bulb glows brightly for liquid A while it glows very dimly for liquid B. (a) Liquid A is a better conductor than liquid B. (b) Liquid B is a better conductor than liquid A. (c) Both liquids are equally conducting. (d) Conducting properties of liquids cannot be compared in this manner.

6385.

In an activity to check the conduction of electricity through two liquids labelled A and B by using a bulb, it is observed that the bulb glows brightly for liquid A while it glows very dimly for liquid B. (a) Liquid A is a better conductor than liquid B. (b) Liquid B is a better conductor than liquid A. (c) Both liquids are equally conducting. (d) Conducting properties of liquids cannot be compared in this manner.

Answer»

In an activity to check the conduction of electricity through two liquids labelled A and B by using a bulb, it is observed that the bulb glows brightly for liquid A while it glows very dimly for liquid B.

(a) Liquid A is a better conductor than liquid B.
(b) Liquid B is a better conductor than liquid A.
(c) Both liquids are equally conducting.
(d) Conducting properties of liquids cannot be compared in this manner.

Discussion

6386.	When current is passed through tap water, the Hydrogen and Oxygen separates. The hydrogen gets accumulated on the negative electrode. Why does it not deposit on positive electrode?
Answer» When current is passed through tap water, the Hydrogen and Oxygen separates. The hydrogen gets accumulated on the negative electrode. Why does it not deposit on positive electrode?

Discussion

6387.	Does shininess of a metal depend upon its density ?
Answer» Does shininess of a metal depend upon its density ?

Discussion

6388.	Rakhi is rubbing two bodies A and B (A bigger than B) together. Which of the following statement is true for her?
Answer» Rakhi is rubbing two bodies A and B (A bigger than B) together. Which of the following statement is true for her?

Discussion

6389.	What is the S.I unit of moment of force?
Answer» What is the S.I unit of moment of force?

Discussion

6390.	How can we define 1 ampere?
Answer» How can we define 1 ampere?

Discussion

6391.	Loud sound heard during lightning is called
Answer» Loud sound heard during lightning is called

Discussion

6392.	Question 8 A brick is kept in three different ways on a table as shown in Fig. The pressure exerted by the brick on the table will be (a) maximum in position A (b) maximum in position B (c) maximum in position C (d) equal in all cases
Answer» Question 8 A brick is kept in three different ways on a table as shown in Fig. The pressure exerted by the brick on the table will be (a) maximum in position A (b) maximum in position B (c) maximum in position C (d) equal in all cases

Discussion

6393.	How does fan work?
Answer» How does fan work?

Discussion

6394.	A pulley system can lift a load of 1200 N by an effort of 250 N. If the resistance due to the weight of movable parts and friction is 300 N.Find the total number of pulleys in the system.
Answer» A pulley system can lift a load of 1200 N by an effort of 250 N. If the resistance due to the weight of movable parts and friction is 300 N.Find the total number of pulleys in the system.

Discussion

6395.	The mass of a bottle is 35 g when it is empty, 65 g when it is filled with water and 59 g when it is filled with alcohol. Find the relative density of alcohol.
Answer» The mass of a bottle is 35 g when it is empty, 65 g when it is filled with water and 59 g when it is filled with alcohol. Find the relative density of alcohol.

Discussion

6396.	A boy plays a musical note on a piano. Next he plays another note of higher pitch to make it louder. Which of the following is true of the second sound when compared with the first?
Answer» A boy plays a musical note on a piano. Next he plays another note of higher pitch to make it louder. Which of the following is true of the second sound when compared with the first?

Discussion

6397.	Name that part of the ear which vibrates when sound from outside falls on it.
Answer» Name that part of the ear which vibrates when sound from outside falls on it.

Discussion

6398.	Convert 400∘C to Kelvin scale.
Answer» Convert $400^{\circ} C$ to Kelvin scale.

Discussion

6399.	Question 22 Fruits detached from a tree fall down due to force of gravity. We know that a force arises due to interaction between two objects. Name the objects interacting in this case.
Answer» Question 22 Fruits detached from a tree fall down due to force of gravity. We know that a force arises due to interaction between two objects. Name the objects interacting in this case.

Discussion

6400.	Why do humans have two ears ??
Answer» Why do humans have two ears ??

Discussion

Explore topic-wise InterviewSolutions in .

An effort of 240 N overcome a useful load 1000 N when applied to a block and system of pulleys; such that the weight movable block and friction is 200 N. What is the efficiency of the system?

Frictional force depends on

What should be the minimum time gap between two sounds to be perceptible by the human ear?

A force has been applied on a ball when it is:

An object experiences a net non - zero force. Is it possible for the object to move with a constant speed along a straight line?

What is neutral buoyancy ?

State two effects of a force when applied to a body.

Match items in column A with one or more items in column B. A B (i) Inner planets (a) Saturn (ii) Outer planets (b) Pole star (iii) Constellation (c) Great Bear (iv) Satellite of the Earth (d) Moon (e) Earth (f) Orion (g) Mars

The S.I. unit of speed is _______.

The waveform representation converts ____

If electrodes were immersed in water, and a current was passed, is the change taking place in the solution a chemical change? Give reason. [ 3 MARKS ]

If an object is placed between focus and centre of curvature of a concave mirror then where will be the image formed?

What is the amount of work to be done on a car of mass 1000 kg to increase its velocity from 10 kmhr−1 to 20 kmhr−1?

What is the S.I. unit of pressure?

Suppose a red coloured ball is placed in the blue light what colour will you observe

Ultrasound is not used to:

Question 2 In the figure, a boy is shown pushing the box from right to left. The force of friction will act on the box. (a) from right to left (←) (b) from left to right (→) (c) vertically downwards (↓) (d) vertically upwards (↑)

What physical changes may one observe upon passage of an electric current through a conducting solution?

Which produces sound of a higher pitch? a drum or a whistle? why?

True or False: The no. of protons and the no. of electrons in an atom of an element is always the same.

PRESBYOPIA

What is an electrode?

HELLO SIR, What is the time period of an object which it oscillates 120 times in a minute? thank you Khushi

What do you mean by coefficient of friction?explain

Name a man made heavenly body?

What is visualization of sound ??

How many images of a candle will be formed if it is placed between two parallel plane mirrors separated by 40 cm?

Why are orbit of plants elliptical in shape??why not any other shape like rectangle??

A wheel of diameter 2 m is shown in the figure. A force F = 2 N is applied at B in the direction shown in figure. Calculate the moment of force about (i) centre O, and (ii) point A.

How will you use a pith ball electroscope to find out whether the charge on a charged body is positive or negative?

Unit of pressure and thrust respectively is?

74 Which of the followig represent correct values for the normal atmospheric pressure ? A. 101.3 kilopascals B.76 mm of mercury C.101.3 pascals D.76 cm of mercury (a) A and B (b) B and C (c) A and D (d) B and D

Acidified water is electrolysed by using carbon electrodes. What is produced at : (a) positive carbon electrode? (b) negative carbon electrode?

When current is passed through tap water, the Hydrogen and Oxygen separates. The hydrogen gets accumulated on the negative electrode. Why does it not deposit on positive electrode?

Does shininess of a metal depend upon its density ?

Rakhi is rubbing two bodies A and B (A bigger than B) together. Which of the following statement is true for her?

What is the S.I unit of moment of force?

How can we define 1 ampere?

Loud sound heard during lightning is called

Question 8 A brick is kept in three different ways on a table as shown in Fig. The pressure exerted by the brick on the table will be (a) maximum in position A (b) maximum in position B (c) maximum in position C (d) equal in all cases

How does fan work?

A pulley system can lift a load of 1200 N by an effort of 250 N. If the resistance due to the weight of movable parts and friction is 300 N.Find the total number of pulleys in the system.

The mass of a bottle is 35 g when it is empty, 65 g when it is filled with water and 59 g when it is filled with alcohol. Find the relative density of alcohol.

A boy plays a musical note on a piano. Next he plays another note of higher pitch to make it louder. Which of the following is true of the second sound when compared with the first?

Name that part of the ear which vibrates when sound from outside falls on it.

Convert 400∘C to Kelvin scale.

Question 22 Fruits detached from a tree fall down due to force of gravity. We know that a force arises due to interaction between two objects. Name the objects interacting in this case.

Why do humans have two ears ??