3752 + Interview Questions in Physics Page 2 InterviewSolution

51.	Question 8A hollow cube of internal edge 22 cm is filled with spherical marbles of diameter 0.5 cm and it is assumed that 18 space of the cube remains unfilled. Then, the number of marbles that the cube can accommodate isThinking process- If we divide the total volume filled by marbles in a cube by volume of a marble, then we get the required number of marbles.(A) 142296(B) 142396(C) 142496(D) 142596
Answer» Question 8 A hollow cube of internal edge 22 cm is filled with spherical marbles of diameter 0.5 cm and it is assumed that $\frac{1}{8}$ space of the cube remains unfilled. Then, the number of marbles that the cube can accommodate is Thinking process- If we divide the total volume filled by marbles in a cube by volume of a marble, then we get the required number of marbles. (A) 142296 (B) 142396 (C) 142496 (D) 142596

51.

Question 8A hollow cube of internal edge 22 cm is filled with spherical marbles of diameter 0.5 cm and it is assumed that 18 space of the cube remains unfilled. Then, the number of marbles that the cube can accommodate isThinking process- If we divide the total volume filled by marbles in a cube by volume of a marble, then we get the required number of marbles.(A) 142296(B) 142396(C) 142496(D) 142596

Answer»

Question 8

A hollow cube of internal edge 22 cm is filled with spherical marbles of diameter 0.5 cm and it is assumed that $\frac{1}{8}$ space of the cube remains unfilled. Then, the number of marbles that the cube can accommodate is

Thinking process- If we divide the total volume filled by marbles in a cube by volume of a marble, then we get the required number of marbles.

(A) 142296

(B) 142396

(C) 142496

(D) 142596

Discussion

52.	Which is not a property of plastics?
Answer» Which is not a property of plastics?

Discussion

53.	Give one example each where:(a) a force moves a stationary body.(b) a force stops a moving body.(c) a force changes the speed of a moving body.(d) a force changes the direction of a moving body.(e) a force changes the shape (and size) of a body.
Answer» Give one example each where: (a) a force moves a stationary body. (b) a force stops a moving body. (c) a force changes the speed of a moving body. (d) a force changes the direction of a moving body. (e) a force changes the shape (and size) of a body.

Discussion

54.	Mark‘True’ or ‘False’ for the followingstatements:(a) Electriccurrent can flow through metals.(b) Insteadof metal wires, a jute string can be used to make a circuit.(c) Electriccurrent can pass through a sheet of thermocol.
Answer» Mark ‘True’ or ‘False’ for the following statements: (a) Electric current can flow through metals. (b) Instead of metal wires, a jute string can be used to make a circuit. (c) Electric current can pass through a sheet of thermocol.

54.

Mark‘True’ or ‘False’ for the followingstatements:(a) Electriccurrent can flow through metals.(b) Insteadof metal wires, a jute string can be used to make a circuit.(c) Electriccurrent can pass through a sheet of thermocol.

Answer»

Mark
‘True’ or ‘False’ for the following
statements:

(a) Electric
current can flow through metals.

(b) Instead
of metal wires, a jute string can be used to make a circuit.

(c) Electric
current can pass through a sheet of thermocol.

Discussion

55.	Current can only flow in a closed circuit. True or false?
Answer» Current can only flow in a closed circuit. True or false?

Discussion

56.	A bus travels at ′v′ km per hour. It is going from Daspur to Beespur. After the bus has traveled 5 hours, Beespur is still 20 km away. What is the distance from Daspur to Beespur? Express it using ′v′.
Answer» A bus travels at $^{'} v^{'} k m$ per $h o u r .$ It is going from Daspur to Beespur. After the bus has traveled $5$ hours, Beespur is still $20 k m$ away. What is the distance from Daspur to Beespur? Express it using $^{'} v^{'} .$

Discussion

57.	Answer the following questions :(a) What are simple machines? Give examples.(b) What are the advantages of using a machine?(c) What is meant by a pulley?(d) What can you use as an inclined plane?(e) What is meant by a lever?(f) What is meant by a complex machine? Give an example.(g) How many types of levers are there? On what basis are they classified?(h) What should we do to take care of machines?
Answer» Answer the following questions : (a) What are simple machines? Give examples. (b) What are the advantages of using a machine? (c) What is meant by a pulley? (d) What can you use as an inclined plane? (e) What is meant by a lever? (f) What is meant by a complex machine? Give an example. (g) How many types of levers are there? On what basis are they classified? (h) What should we do to take care of machines?

57.

Answer the following questions :(a) What are simple machines? Give examples.(b) What are the advantages of using a machine?(c) What is meant by a pulley?(d) What can you use as an inclined plane?(e) What is meant by a lever?(f) What is meant by a complex machine? Give an example.(g) How many types of levers are there? On what basis are they classified?(h) What should we do to take care of machines?

Answer»

Answer the following questions :

(a) What are simple machines? Give examples.

(b) What are the advantages of using a machine?

(c) What is meant by a pulley?

(d) What can you use as an inclined plane?

(e) What is meant by a lever?

(f) What is meant by a complex machine? Give an example.

(g) How many types of levers are there? On what basis are they classified?

(h) What should we do to take care of machines?

Discussion

58.	A bar magnet of magnetic moment M is placed at right angles to a magnetic induction B. If a force F is experienced by each pole of the magnet, the length of the magnet will be
Answer» A bar magnet of magnetic moment M is placed at right angles to a magnetic induction B. If a force F is experienced by each pole of the magnet, the length of the magnet will be

Discussion

59.	A student performs experiment with simple pendulum and measures time for 10 vibrations. If he measures a time for 100 vibrations, the relative error in measurements of time period will be reduced by
Answer» A student performs experiment with simple pendulum and measures time for 10 vibrations. If he measures a time for 100 vibrations, the relative error in measurements of time period will be reduced by

Discussion

60.	Fans, refrigerators and other appliances use ____ energy to operate.
Answer» Fans, refrigerators and other appliances use ____ energy to operate.

Discussion

61.	If the characteristic cube compressive strength is 25 MPa, then its flexural strength (in MPa) is ____.3.5
Answer» If the characteristic cube compressive strength is $25$ $M P a$ , then its flexural strength (in MPa) is ____. 3.5

Discussion

62.	is revolution of earth around sun a periodic motion
Answer» is revolution of earth around sun a periodic motion

Discussion

63.	Why for rolling f≤μ R and for sliding f≥μ R . Here f represents frictional force and bodies are on inclined plane making an angle θ with the ground
Answer» Why for rolling f≤μ R and for sliding f≥μ R . Here f represents frictional force and bodies are on inclined plane making an angle θ with the ground

Discussion

64.	The distance between the boy a plane mirror is 2 m. What is the distance between the plane mirror and his image?
Answer» The distance between the boy a plane mirror is $2 m$ . What is the distance between the plane mirror and his image?

Discussion

65.	What is electro - magnets
Answer» What is electro - magnets

Discussion

66.	Is it possible for a cow to get any disease when it swallows a cow magnet to take out any magnetic substance ?
Answer» Is it possible for a cow to get any disease when it swallows a cow magnet to take out any magnetic substance ?

Discussion

67.	Why do we use a pinhole camera?
Answer» Why do we use a pinhole camera?

Discussion

68.	Is air around us always transparent? Discuss.
Answer» Is air around us always transparent? Discuss.

Discussion

69.	When the filament of a bulb is broken
Answer» When the filament of a bulb is broken

Discussion

70.	What is the cause of hamburger effect?
Answer» What is the cause of hamburger effect?

Discussion

71.	calculate the percentage change in kinetic energy of a body if momentum of the body is doubled
Answer» calculate the percentage change in kinetic energy of a body if momentum of the body is doubled

Discussion

72.	A bar magnet is cut into two pieces A and B, from the middle, as shown in Fig.Will the two pieces act as individual magnets? Mark the poles of these two pieces. Suggest an activity to verify your answer. [5 MARKS]
Answer» A bar magnet is cut into two pieces A and B, from the middle, as shown in Fig. Will the two pieces act as individual magnets? Mark the poles of these two pieces. Suggest an activity to verify your answer. [5 MARKS]

Discussion

73.	Which among the following will affect the magnet's strength?
Answer» Which among the following will affect the magnet's strength?

Discussion

74.	____________is a device used by navigators to find the direction.
Answer» ____________is a device used by navigators to find the direction.

Discussion

75.	Precautions while measuring length is:
Answer» Precautions while measuring length is:

Discussion

76.	A geostationary satellite is orbiting the earth at a height 6R above the surface of earth where Ris radius of earth.what will be tha time period of another satellite at a 2.5 from the surface of earth?
Answer» A geostationary satellite is orbiting the earth at a height 6R above the surface of earth where Ris radius of earth.what will be tha time period of another satellite at a 2.5 from the surface of earth?

Discussion

77.	Answer the following question.(a) What is a constellation?(b) What points should be considered before a sky watch?(c) Is it wrong to say that the planets, stars and nakshatras affect human life? Why?
Answer» Answer the following question. (a) What is a constellation? (b) What points should be considered before a sky watch? (c) Is it wrong to say that the planets, stars and nakshatras affect human life? Why?

Discussion

78.	The earth behaves like a huge bar magnet with its magnetic north pole near the geographical __________ Pole.
Answer» The earth behaves like a huge bar magnet with its magnetic north pole near the geographical __________ Pole.

Discussion

79.	Which physical quantity is used to describe how far a body has travelled?
Answer» Which physical quantity is used to describe how far a body has travelled?

Discussion

80.	11. How to find magnetic moment of a compound
Answer» 11. How to find magnetic moment of a compound

Discussion

81.	A bulb consists of:
Answer» A bulb consists of:

Discussion

82.	Range of resistivity of semiconductors is -
Answer» Range of resistivity of semiconductors is -

Discussion

83.	Nuclei of two elements P and Q have binding energies EP and EQ. If four nuclei of element Q combine to give one P nucleus (as a daughter nucleus) releasing e units of energy along then
Answer» Nuclei of two elements $P$ and $Q$ have binding energies $E_{P}$ and $E_{Q} .$ If four nuclei of element $Q$ combine to give one $P$ nucleus (as a daughter nucleus) releasing $e$ units of energy along then

Discussion

84.	The speed of light in air is 2980000000m/s,as we know but why it takes 8min 30seconds to reach the Earth.
Answer» The speed of light in air is 2980000000m/s,as we know but why it takes 8min 30seconds to reach the Earth.

Discussion

85.	Which of these statements describe the correct properties of friction?A. Rolling friction is always greater than sliding friction.B. Friction acts in the opposite direction of relative motion.C. Friction causes the surfaces in contact to wear away.D. Friction produces heat energy.
Answer» Which of these statements describe the correct properties of friction? A. Rolling friction is always greater than sliding friction. B. Friction acts in the opposite direction of relative motion. C. Friction causes the surfaces in contact to wear away. D. Friction produces heat energy.

85.

Which of these statements describe the correct properties of friction?A. Rolling friction is always greater than sliding friction.B. Friction acts in the opposite direction of relative motion.C. Friction causes the surfaces in contact to wear away.D. Friction produces heat energy.

Answer»

Which of these statements describe the correct properties of friction?

A. Rolling friction is always greater than sliding friction.

B. Friction acts in the opposite direction of relative motion.

C. Friction causes the surfaces in contact to wear away.

D. Friction produces heat energy.

Discussion

86.	The time period of a simple pendulum can be changed by:
Answer» The time period of a simple pendulum can be changed by:

Discussion

87.	Which of the following forms of energy is responsible for maintaining Earth’s temperature?
Answer» Which of the following forms of energy is responsible for maintaining Earth’s temperature?

Discussion

88.	Identify the energy involved in the given set of pictures.
Answer» Identify the energy involved in the given set of pictures.

Discussion

89.	Distinguish between graphite and diamond on the basis of their structures.
Answer» Distinguish between graphite and diamond on the basis of their structures.

Discussion

90.	Do magnetosphere able to stop Solar winds to a greater extent? Do moon also have a magnetosphere?
Answer» Do magnetosphere able to stop Solar winds to a greater extent? Do moon also have a magnetosphere?

Discussion

91.	Why isn't ammonia used as coolant in cars now a days
Answer» Why isn't ammonia used as coolant in cars now a days

Discussion

92.	Which of the following gets attracted to a magnet?
Answer» Which of the following gets attracted to a magnet?

Discussion

93.	Three cars A, B and C are moving side by side. As car A and B move ahead at the same speed(leaving car C behind) then which of the following statement is true:
Answer» Three cars A, B and C are moving side by side. As car A and B move ahead at the same speed(leaving car C behind) then which of the following statement is true:

Discussion

94.	In the process of magentising an iron piece, where will the north pole be formed?
Answer» In the process of magentising an iron piece, where will the north pole be formed?

Discussion

95.	53.Plane of inclination 1 in 2 . what does it mean
Answer» 53.Plane of inclination 1 in 2 . what does it mean

Discussion

96.	How does a switch behave when it is in ON condition?
Answer» How does a switch behave when it is in ON condition?

Discussion

97.	Are most objects around us luminous or non-luminous?
Answer» Are most objects around us luminous or non-luminous?

Discussion

98.	Statements: All mirrors are dials. All dials are spoons. Some spoons are desks. Some desks are chairs. Conclusions: I. Some desks are dials. II. Some spoons are mirrors. III. Some desks are mirrors. IV. Some chairs are spoons.
Answer» Statements: All mirrors are dials. All dials are spoons. Some spoons are desks. Some desks are chairs. Conclusions: I. Some desks are dials. II. Some spoons are mirrors. III. Some desks are mirrors. IV. Some chairs are spoons.

98.

Statements: All mirrors are dials. All dials are spoons. Some spoons are desks. Some desks are chairs. Conclusions: I. Some desks are dials. II. Some spoons are mirrors. III. Some desks are mirrors. IV. Some chairs are spoons.

Answer»

Statements:

All mirrors are dials.

All dials are spoons.

Some spoons are desks.

Some desks are chairs.

Conclusions:

I. Some desks are dials.

II. Some spoons are mirrors.

III. Some desks are mirrors.

IV. Some chairs are spoons.

Discussion

99.	Question 12Which of the following property is not responsible for copper to be used as electrical conduction wires?(a) ductility(b) colour(c) good conductor of electricity(d) it is solid
Answer» Question 12 Which of the following property is not responsible for copper to be used as electrical conduction wires? (a) ductility (b) colour (c) good conductor of electricity (d) it is solid

Discussion

100.	Dog is barking at a rate 4π μ watt.Sound level at a point at a dis†an ce 10 m from the dog is
Answer» Dog is barking at a rate 4π μ watt.Sound level at a point at a dis†an ce 10 m from the dog is

Discussion

Explore topic-wise InterviewSolutions in .

Which is not a property of plastics?

Give one example each where:(a) a force moves a stationary body.(b) a force stops a moving body.(c) a force changes the speed of a moving body.(d) a force changes the direction of a moving body.​(e) a force changes the shape (and size) of a body.

Mark‘True’ or ‘False’ for the followingstatements:(a) Electriccurrent can flow through metals.(b) Insteadof metal wires, a jute string can be used to make a circuit.(c) Electriccurrent can pass through a sheet of thermocol.

Current can only flow in a closed circuit. True or false?

A bus travels at ′v′ km per hour. It is going from Daspur to Beespur. After the bus has traveled 5 hours, Beespur is still 20 km away. What is the distance from Daspur to Beespur? Express it using ′v′.

A bar magnet of magnetic moment M is placed at right angles to a magnetic induction B. If a force F is experienced by each pole of the magnet, the length of the magnet will be

A student performs experiment with simple pendulum and measures time for 10 vibrations. If he measures a time for 100 vibrations, the relative error in measurements of time period will be reduced by

Fans, refrigerators and other appliances use ____ energy to operate.

If the characteristic cube compressive strength is 25 MPa, then its flexural strength (in MPa) is ____.3.5

is revolution of earth around sun a periodic motion

Why for rolling f≤μ R and for sliding f≥μ R . Here f represents frictional force and bodies are on inclined plane making an angle θ with the ground

The distance between the boy a plane mirror is 2 m. What is the distance between the plane mirror and his image?

What is electro - magnets

Is it possible for a cow to get any disease when it swallows a cow magnet to take out any magnetic substance ?

Why do we use a pinhole camera?

Is air around us always transparent? Discuss.

When the filament of a bulb is broken

What is the cause of hamburger effect?

calculate the percentage change in kinetic energy of a body if momentum of the body is doubled

A bar magnet is cut into two pieces A and B, from the middle, as shown in Fig.Will the two pieces act as individual magnets? Mark the poles of these two pieces. Suggest an activity to verify your answer. [5 MARKS]

Which among the following will affect the magnet's strength?

____________is a device used by navigators to find the direction.

Precautions while measuring length is:

A geostationary satellite is orbiting the earth at a height 6R above the surface of earth where Ris radius of earth.what will be tha time period of another satellite at a 2.5 from the surface of earth?

Answer the following question.(a) What is a constellation?(b) What points should be considered before a sky watch?(c) Is it wrong to say that the planets, stars and nakshatras affect human life? Why?

The earth behaves like a huge bar magnet with its magnetic north pole near the geographical __________ Pole.

Which physical quantity is used to describe how far a body has travelled?

11. How to find magnetic moment of a compound

A bulb consists of:

Range of resistivity of semiconductors is -

Nuclei of two elements P and Q have binding energies EP and EQ. If four nuclei of element Q combine to give one P nucleus (as a daughter nucleus) releasing e units of energy along then

The speed of light in air is 2980000000m/s,as we know but why it takes 8min 30seconds to reach the Earth.

Which of these statements describe the correct properties of friction?A. Rolling friction is always greater than sliding friction.B. Friction acts in the opposite direction of relative motion.C. Friction causes the surfaces in contact to wear away.D. Friction produces heat energy.

The time period of a simple pendulum can be changed by:

Which of the following forms of energy is responsible for maintaining Earth’s temperature?

Identify the energy involved in the given set of pictures.

Distinguish between graphite and diamond on the basis of their structures.

Do magnetosphere able to stop Solar winds to a greater extent? Do moon also have a magnetosphere?

Why isn't ammonia used as coolant in cars now a days

Which of the following gets attracted to a magnet?

Three cars A, B and C are moving side by side. As car A and B move ahead at the same speed(leaving car C behind) then which of the following statement is true:

In the process of magentising an iron piece, where will the north pole be formed?

53.Plane of inclination 1 in 2 . what does it mean

How does a switch behave when it is in ON condition?

Are most objects around us luminous or non-luminous?

Statements: All mirrors are dials. All dials are spoons. Some spoons are desks. Some desks are chairs. Conclusions: I. Some desks are dials. II. Some spoons are mirrors. III. Some desks are mirrors. IV. Some chairs are spoons.

Question 12Which of the following property is not responsible for copper to be used as electrical conduction wires?(a) ductility(b) colour(c) good conductor of electricity(d) it is solid

Dog is barking at a rate 4π μ watt.Sound level at a point at a dis†an ce 10 m from the dog is

Give one example each where:(a) a force moves a stationary body.(b) a force stops a moving body.(c) a force changes the speed of a moving body.(d) a force changes the direction of a moving body.(e) a force changes the shape (and size) of a body.