9478 + Interview Questions in Physics Page 115 InterviewSolution

5701.	Name one destructive natural phenomenon whch cannot be predicted in advance.
Answer» Name one destructive natural phenomenon whch cannot be predicted in advance.

Discussion

5702.	Calculate the pressure at a depth of 50 m below the surface of the sea. The density of sea water is 1024 kg/m3. Take acceleration due to gravity g = 10 m/s2
Answer» Calculate the pressure at a depth of $50 m$ below the surface of the sea. The density of sea water is $1024 k g / m^{3}$ . Take acceleration due to gravity $g = 10 m / s^{2}$

Discussion

5703.	Describe an experiment to demonstrate the process of sublimation.
Answer» Describe an experiment to demonstrate the process of sublimation.

Discussion

5704.	If two pieces of same metal having Ultra smooth surfaces are kept in contact comment on the friction between two surfaces when we try to move one on the other justify your answer with proper reasons. How do F1 cars manage to develop friction even though they don't have treading
Answer» If two pieces of same metal having Ultra smooth surfaces are kept in contact comment on the friction between two surfaces when we try to move one on the other justify your answer with proper reasons. How do F1 cars manage to develop friction even though they don't have treading

5704.

If two pieces of same metal having Ultra smooth surfaces are kept in contact comment on the friction between two surfaces when we try to move one on the other justify your answer with proper reasons. How do F1 cars manage to develop friction even though they don't have treading

Answer»

If two pieces of same metal having Ultra smooth surfaces are kept in contact comment on the friction between two surfaces when we try to move one on the other justify your answer with proper reasons.

How do F1 cars manage to develop friction even though they don't have treading

Discussion

5705.	Those who suffer from both myopia and hypermetropia use to wear bifocal spectacle. In this case the image is formed before retina or after retina
Answer» Those who suffer from both myopia and hypermetropia use to wear bifocal spectacle. In this case the image is formed before retina or after retina

Discussion

5706.	Identify the possessive noun from the sentence. The fire-fighter’s attitude towards life made him different from other people.
Answer» Identify the possessive noun from the sentence. The fire-fighter’s attitude towards life made him different from other people.

5706.

Identify the possessive noun from the sentence. The fire-fighter’s attitude towards life made him different from other people.

Answer»

Identify the possessive noun from the sentence.

The fire-fighter’s attitude towards life made him different from other people.

Discussion

5707.	What two things fully describes a force?
Answer» What two things fully describes a force?

Discussion

5708.	(a) Given examples to show that firction depends on the nature of two surfaces in contact. (b) Give an example to show that friction depends on the force with which the two surfaces are pressed together.
Answer» (a) Given examples to show that firction depends on the nature of two surfaces in contact. (b) Give an example to show that friction depends on the force with which the two surfaces are pressed together.

Discussion

5709.	Explain with the help of diagrams, how the use of oil reduces friction between two surfaces in contact with each other.
Answer» Explain with the help of diagrams, how the use of oil reduces friction between two surfaces in contact with each other.

Discussion

5710.	Change in effect of a force can be experienced by
Answer» Change in effect of a force can be experienced by

Discussion

5711.	A cylindrical object of outer diameter 20cm and mass 2kg floats in water with its axis vertical. If it is slightly depressed and then released find time period of the resulting SHM of the object.
Answer» A cylindrical object of outer diameter 20cm and mass 2kg floats in water with its axis vertical. If it is slightly depressed and then released find time period of the resulting SHM of the object.

Discussion

5712.	what is the difference between n/m2 and pascal(p)?and what is the SI unit of pressure?
Answer» what is the difference between n/m²and pascal(p)?and what is the SI unit of pressure?

Discussion

5713.	When lightning strikes a lightning rod on top of a tall building, electrical energy flows through a wire and into the _____
Answer» When lightning strikes a lightning rod on top of a tall building, electrical energy flows through a wire and into the _____

Discussion

5714.	Voice of which of the following is likely to have the minimum frequency ? (a) baby girl (b) baby boy (c) a man (d) a woman
Answer» Voice of which of the following is likely to have the minimum frequency ? (a) baby girl (b) baby boy (c) a man (d) a woman

Discussion

5715.	A hockey player is moving northward and suddenly turns westward with the same speed to avoid an opponent. The force that acts on the player is _________. A): Frictional force along westward. B)Muscle force along southward. C)Frictional force along south west D)Muscle force along south west.
Answer» A hockey player is moving northward and suddenly turns westward with the same speed to avoid an opponent. The force that acts on the player is _________. A): Frictional force along westward. B)Muscle force along southward. C)Frictional force along south west D)Muscle force along south west.

Discussion

5716.	Question 08 Image formed by a plane mirror is : a) virtual, behind the mirror and enlarged. b) virtual, behind the mirror and of the same size as the object. c) real at the surface of the mirror and enlarged. d) real, behind the mirror and of the same size as the object.
Answer» Question 08 Image formed by a plane mirror is : a) virtual, behind the mirror and enlarged. b) virtual, behind the mirror and of the same size as the object. c) real at the surface of the mirror and enlarged. d) real, behind the mirror and of the same size as the object.

Discussion

5717.	How does a Ball bearing work?
Answer» How does a Ball bearing work?

Discussion

5718.	Write a short note on choroid ?
Answer» Write a short note on choroid ?

Discussion

5719.	The first law of reflection states that :
Answer» The first law of reflection states that :

Discussion

5720.	Define the term density of a substance.
Answer» Define the term density of a substance.

Discussion

5721.	How does the effect of a force differ when it is applied on (a) a rigid body, (b) a non- rigid body?
Answer» How does the effect of a force differ when it is applied on (a) a rigid body, (b) a non- rigid body?

Discussion

5722.	A force of 10 N is applied on an object of mass 1 kg for 2 s, which was initially at rest. What is the work done on the object by the force?
Answer» A force of $10 N$ is applied on an object of mass $1 k g$ for $2 s$ , which was initially at rest. What is the work done on the object by the force?

Discussion

5723.	The correct relation is:
Answer» The correct relation is:

Discussion

5724.	Which of the following will sink or float on water ? (Density of water =1 g cm−3 (a) Body A having density 500 kg m−3 (b) Body B having density 2520 kg m−3 (c) Body C having density 1100 kg m−3 (d) Body D having density 0.85 g m−3
Answer» Which of the following will sink or float on water ? (Density of water =1 g $c m^{-} 3$ (a) Body A having density $500 k g m^{-} 3$ (b) Body B having density $2520 k g m^{-} 3$ (c) Body C having density $1100 k g m^{-} 3$ (d) Body D having density $0.85 g m^{-} 3$

5724.

Which of the following will sink or float on water ? (Density of water =1 g cm−3 (a) Body A having density 500 kg m−3 (b) Body B having density 2520 kg m−3 (c) Body C having density 1100 kg m−3 (d) Body D having density 0.85 g m−3

Answer»

Which of the following will sink or float on water ? (Density of water =1 g $c m^{-} 3$

(a) Body A having density $500 k g m^{-} 3$

(b) Body B having density $2520 k g m^{-} 3$

(c) Body C having density $1100 k g m^{-} 3$

(d) Body D having density $0.85 g m^{-} 3$

Discussion

5725.	A dam has the broader walls at the bottom than at the top.Give reason?
Answer» A dam has the broader walls at the bottom than at the top.Give reason?

Discussion

5726.	If a ray of light is incident at an angle of 53.2∘ to the normal, then the angle formed by the reflected ray with the normal is equal to?
Answer» If a ray of light is incident at an angle of ${53.2}^{\circ}$ to the normal, then the angle formed by the reflected ray with the normal is equal to?

Discussion

5727.	What is speed of light in vacuum? How does vacuum, force and air effects speed of light?
Answer» What is speed of light in vacuum? How does vacuum, force and air effects speed of light?

Discussion

5728.	Identify the electrical charge of Gamma rays.
Answer» Identify the electrical charge of Gamma rays.

Discussion

5729.	Pritish pulls a load up an inclined road. What is/are the force(s) he must overcome to pull it up?
Answer» Pritish pulls a load up an inclined road. What is/are the force(s) he must overcome to pull it up?

Discussion

5730.	What is length of orbit of earth?
Answer» What is length of orbit of earth?

Discussion

5731.	Which criterion is being used to classify lever three types?
Answer» Which criterion is being used to classify lever three types?

Discussion

5732.	Choose the correct statements: Statement 1: We see objects when light emitted from the objects enter our eyes. Statement 2: We see objects when light reflected from the objects enter our eyes. Statement 3: Eyes alone cannot see an object. Statement 4: Eyes emit light rays in all direction.
Answer» Choose the correct statements: Statement 1: We see objects when light emitted from the objects enter our eyes. Statement 2: We see objects when light reflected from the objects enter our eyes. Statement 3: Eyes alone cannot see an object. Statement 4: Eyes emit light rays in all direction.

5732.

Choose the correct statements: Statement 1: We see objects when light emitted from the objects enter our eyes. Statement 2: We see objects when light reflected from the objects enter our eyes. Statement 3: Eyes alone cannot see an object. Statement 4: Eyes emit light rays in all direction.

Answer»

Choose the correct statements:

Statement 1: We see objects when light emitted from the objects enter our eyes.

Statement 2: We see objects when light reflected from the objects enter our eyes.

Statement 3: Eyes alone cannot see an object.

Statement 4: Eyes emit light rays in all direction.

Discussion

5733.	A current of 0.5 A is drawn by a filament of an electric bulb for 10 minutes. The amount of electric charge that flows through the circuit is:
Answer» A current of 0.5 A is drawn by a filament of an electric bulb for 10 minutes. The amount of electric charge that flows through the circuit is:

Discussion

5734.	When you listen to the sound produced by a tuning fork and the sound produced by a sitar, you find that tuning fork and the sound flat whereas the sitar sounds shrill. Why?
Answer» When you listen to the sound produced by a tuning fork and the sound produced by a sitar, you find that tuning fork and the sound flat whereas the sitar sounds shrill. Why?

Discussion

5735.	Which of the following statement(s) is/are true about relative density? Statement 1: Relative density is known as the specific gravity of the substance. Statement 2: Relative density of a substance is the ratio of the density of the substance to the density of water at 4∘C. Statement 3: Relative density of a substance is the ratio of the mass of water at 4∘C to the mass of a substance at 4∘C. Statement 4: Relative density is unitless.
Answer» Which of the following statement(s) is/are true about relative density? Statement 1: Relative density is known as the specific gravity of the substance. Statement 2: Relative density of a substance is the ratio of the density of the substance to the density of water at $4^{\circ} C$ . Statement 3: Relative density of a substance is the ratio of the mass of water at $4^{\circ} C$ to the mass of a substance at $4^{\circ} C$ . Statement 4: Relative density is unitless.

Discussion

5736.	A ball thrown vertically upwards with a speed of 19.6ms from the top of a tower returns to the earth in 6 s. Find the height of the tower:
Answer» A ball thrown vertically upwards with a speed of $19.6 \frac{m}{s}$ from the top of a tower returns to the earth in 6 s. Find the height of the tower:

Discussion

5737.	If an object is at a distance of 5 units from the axis of reflection, what will be the distance of its image from the axis?
Answer» If an object is at a distance of $5$ units from the axis of reflection, what will be the distance of its image from the axis?

Discussion

5738.	What kind of force does friction come under?
Answer» What kind of force does friction come under?

Discussion

5739.	What is behind the universe ?
Answer» What is behind the universe ?

Discussion

5740.	A bullet weighing 30 g is fired at a speed of 120 ms−1. If the gun recoils with a speed of 4 ms−1, find the mass of the gun.
Answer» A bullet weighing $30 g$ is fired at a speed of $120 m s^{- 1}$ . If the gun recoils with a speed of $4 m s^{- 1}$ , find the mass of the gun.

Discussion

5741.	Suppose you want to move a heavy box kept on a horizontal surface. If you apply a small force, the box doesn't move. Why?
Answer» Suppose you want to move a heavy box kept on a horizontal surface. If you apply a small force, the box doesn't move. Why?

Discussion

5742.	Define the term moment of force.
Answer» Define the term moment of force.

Discussion

5743.	Chromium is a shiny metal that does not corrode. Instead of electroplating iron with chromium, why are sanitary fittings not made of chromium itself?
Answer» Chromium is a shiny metal that does not corrode. Instead of electroplating iron with chromium, why are sanitary fittings not made of chromium itself?

Discussion

5744.	Which of the following effects of electric current is made use of in the figure shown below?
Answer» Which of the following effects of electric current is made use of in the figure shown below?

Discussion

5745.	Why is the candle flame always pointed to the top?please explain it in a clearway
Answer» Why is the candle flame always pointed to the top?please explain it in a clearway

Discussion

5746.	Give reason why the mud stuck to a vehicle flies off tangentially during the motion of the wheel
Answer» Give reason why the mud stuck to a vehicle flies off tangentially during the motion of the wheel

Discussion

5747.	Question 10 Paheli had heard that rain water is as good as distilled water. So, she collected some rain water in a clean glass tumbler and tested it using a tester. To her surprise, she found that the compass needle showed deflection. What could be the reasons?
Answer» Question 10 Paheli had heard that rain water is as good as distilled water. So, she collected some rain water in a clean glass tumbler and tested it using a tester. To her surprise, she found that the compass needle showed deflection. What could be the reasons?

Discussion

5748.	Moonlight is spread out when it is reflected by the lake so that the image of moon is not clear as it is with a mirror. Explain this phenomenon? [3 MARKS]
Answer» Moonlight is spread out when it is reflected by the lake so that the image of moon is not clear as it is with a mirror. Explain this phenomenon? [3 MARKS]

Discussion

5749.	When people used to communicate using drums (talking drums) in olden days they used to beat the drums near water body because:
Answer» When people used to communicate using drums (talking drums) in olden days they used to beat the drums near water body because:

5749.

When people used to communicate using drums (talking drums) in olden days they used to beat the drums near water body because:

Answer»

When people used to communicate using drums (talking drums) in olden days they used to beat the drums near water body because:

Discussion

5750.	What is the colour of sun?
Answer» What is the colour of sun?

Discussion

Explore topic-wise InterviewSolutions in .

Name one destructive natural phenomenon whch cannot be predicted in advance.

Calculate the pressure at a depth of 50 m below the surface of the sea. The density of sea water is 1024 kg/m3. Take acceleration due to gravity g = 10 m/s2

Describe an experiment to demonstrate the process of sublimation.

If two pieces of same metal having Ultra smooth surfaces are kept in contact comment on the friction between two surfaces when we try to move one on the other justify your answer with proper reasons. How do F1 cars manage to develop friction even though they don't have treading

Those who suffer from both myopia and hypermetropia use to wear bifocal spectacle. In this case the image is formed before retina or after retina

Identify the possessive noun from the sentence. The fire-fighter’s attitude towards life made him different from other people.

What two things fully describes a force?

(a) Given examples to show that firction depends on the nature of two surfaces in contact. (b) Give an example to show that friction depends on the force with which the two surfaces are pressed together.

Explain with the help of diagrams, how the use of oil reduces friction between two surfaces in contact with each other.

Change in effect of a force can be experienced by

A cylindrical object of outer diameter 20cm and mass 2kg floats in water with its axis vertical. If it is slightly depressed and then released find time period of the resulting SHM of the object.

what is the difference between n/m2 and pascal(p)?and what is the SI unit of pressure?

When lightning strikes a lightning rod on top of a tall building, electrical energy flows through a wire and into the _____

Voice of which of the following is likely to have the minimum frequency ? (a) baby girl (b) baby boy (c) a man (d) a woman

A hockey player is moving northward and suddenly turns westward with the same speed to avoid an opponent. The force that acts on the player is _________. A): Frictional force along westward. B)Muscle force along southward. C)Frictional force along south west D)Muscle force along south west.

Question 08 Image formed by a plane mirror is : a) virtual, behind the mirror and enlarged. b) virtual, behind the mirror and of the same size as the object. c) real at the surface of the mirror and enlarged. d) real, behind the mirror and of the same size as the object.

How does a Ball bearing work?

Write a short note on choroid ?

The first law of reflection states that :

Define the term density of a substance.

How does the effect of a force differ when it is applied on (a) a rigid body, (b) a non- rigid body?

A force of 10 N is applied on an object of mass 1 kg for 2 s, which was initially at rest. What is the work done on the object by the force?

The correct relation is:

Which of the following will sink or float on water ? (Density of water =1 g cm−3 (a) Body A having density 500 kg m−3 (b) Body B having density 2520 kg m−3 (c) Body C having density 1100 kg m−3 (d) Body D having density 0.85 g m−3

A dam has the broader walls at the bottom than at the top.Give reason?

If a ray of light is incident at an angle of 53.2∘ to the normal, then the angle formed by the reflected ray with the normal is equal to?

What is speed of light in vacuum? How does vacuum, force and air effects speed of light?

Identify the electrical charge of Gamma rays.

Pritish pulls a load up an inclined road. What is/are the force(s) he must overcome to pull it up?

What is length of orbit of earth?

Which criterion is being used to classify lever three types?

Choose the correct statements: Statement 1: We see objects when light emitted from the objects enter our eyes. Statement 2: We see objects when light reflected from the objects enter our eyes. Statement 3: Eyes alone cannot see an object. Statement 4: Eyes emit light rays in all direction.

A current of 0.5 A is drawn by a filament of an electric bulb for 10 minutes. The amount of electric charge that flows through the circuit is:

When you listen to the sound produced by a tuning fork and the sound produced by a sitar, you find that tuning fork and the sound flat whereas the sitar sounds shrill. Why?

A ball thrown vertically upwards with a speed of 19.6ms from the top of a tower returns to the earth in 6 s. Find the height of the tower:

If an object is at a distance of 5 units from the axis of reflection, what will be the distance of its image from the axis?

What kind of force does friction come under?

What is behind the universe ?

A bullet weighing 30 g is fired at a speed of 120 ms−1. If the gun recoils with a speed of 4 ms−1, find the mass of the gun.

Suppose you want to move a heavy box kept on a horizontal surface. If you apply a small force, the box doesn't move. Why?

Define the term moment of force.

Chromium is a shiny metal that does not corrode. Instead of electroplating iron with chromium, why are sanitary fittings not made of chromium itself?

Which of the following effects of electric current is made use of in the figure shown below?

Why is the candle flame always pointed to the top?please explain it in a clearway

Give reason why the mud stuck to a vehicle flies off tangentially during the motion of the wheel

Question 10 Paheli had heard that rain water is as good as distilled water. So, she collected some rain water in a clean glass tumbler and tested it using a tester. To her surprise, she found that the compass needle showed deflection. What could be the reasons?

Moonlight is spread out when it is reflected by the lake so that the image of moon is not clear as it is with a mirror. Explain this phenomenon? [3 MARKS]

When people used to communicate using drums (talking drums) in olden days they used to beat the drums near water body because:

What is the colour of sun?