6277 + Interview Questions in Physics Page 2 InterviewSolution

51.	Convert 22 m/s into km/h.
Answer» Convert 22 m/s into km/h.

Discussion

52.	If the speed of a car is 20 ms−1, what is the speed in km h−1?72
Answer» If the speed of a car is $20 m s^{- 1}$ , what is the speed in $k m h^{- 1}$ ? 72

Discussion

53.	A ball is thrown with an initial velocity of 20 m/s. Find the time of flight and the maximum height reached by the body. (Assume acceleration due to gravity g=10m/s2.
Answer» A ball is thrown with an initial velocity of 20 m/s. Find the time of flight and the maximum height reached by the body. (Assume acceleration due to gravity $g = 10 m / s^{2}$ .

Discussion

54.	A gas exerts pressure on the walls of the container. Why?
Answer» A gas exerts pressure on the walls of the container. Why?

Discussion

55.	Briefly explain droughts and floods.
Answer» Briefly explain droughts and floods.

Discussion

56.	The phenomenon in which left appears as right and vice versa in the image formation by a plane mirror is called ______.
Answer» The phenomenon in which left appears as right and vice versa in the image formation by a plane mirror is called ______.

Discussion

57.	Why does the metallic pan used for cooking has a plastic or wooden handle?
Answer» Why does the metallic pan used for cooking has a plastic or wooden handle?

Discussion

58.	Which of the following can use an electric cell for working?
Answer» Which of the following can use an electric cell for working?

Discussion

59.	is electric flux conserved?
Answer» is electric flux conserved?

Discussion

60.	8. State Hess’s law of constant heat summation.
Answer» 8. State Hess’s law of constant heat summation.

Discussion

61.	why tension in the string is electromagnetic force.
Answer» why tension in the string is electromagnetic force.

Discussion

62.	Give an everyday example which shows that heat is a form of energy.
Answer» Give an everyday example which shows that heat is a form of energy.

Discussion

63.	Which force is strong gravitational or magnetic.
Answer» Which force is strong gravitational or magnetic.

Discussion

64.	a capacitor C_1=1microF can withs†an d maximum voltage V_1=6KV and another capacitor of capaci†an ce C_2=3microF can withs†an d maximum voltage V_2=4KV,when the two capacitors are combined in series ,the combined system can stnad a maximum voltage of ?
Answer» a capacitor C_1=1microF can withs†an d maximum voltage V_1=6KV and another capacitor of capaci†an ce C_2=3microF can withs†an d maximum voltage V_2=4KV,when the two capacitors are combined in series ,the combined system can stnad a maximum voltage of ?

Discussion

65.	A body travels a distance of 15 m from A to B and then moves a distance of 20 m at right angles to AB and move to C. Calculate the total distance and displacement?
Answer» A body travels a distance of 15 m from A to B and then moves a distance of 20 m at right angles to AB and move to C. Calculate the total distance and displacement?

Discussion

66.	Tyndall effect is the phenomenon of scattering of light by _________.
Answer» Tyndall effect is the phenomenon of scattering of light by _________.

Discussion

67.	Law of refraction is also termed as ___
Answer» Law of refraction is also termed as ___

Discussion

68.	The wires A and B shown in the figure are made of the same material, and have radii rA and rB respectively. The block between them has a mass m. When the force F is mg/3, one of the wires breaks.
Answer» The wires A and B shown in the figure are made of the same material, and have radii r_A and r_B respectively. The block between them has a mass m. When the force F is mg/3, one of the wires breaks.

68.

The wires A and B shown in the figure are made of the same material, and have radii rA and rB respectively. The block between them has a mass m. When the force F is mg/3, one of the wires breaks.

Answer»

The wires A and B shown in the figure are made of the same material, and have radii r_A and r_B respectively. The block between them has a mass m. When the force F is mg/3, one of the wires breaks.

Discussion

69.	A vertical spring with force constant k is fixed on a table.A ball of mass m at a height h above the free upper end of the spring falls vertically on the spring,so that the spring is compressed by a distance d.What is the net work done in the process?
Answer» A vertical spring with force constant k is fixed on a table.A ball of mass m at a height h above the free upper end of the spring falls vertically on the spring,so that the spring is compressed by a distance d.What is the net work done in the process?

Discussion

70.	The smell of hot sizzling food reaches several metres away, but to get the smell from cold food, we have to go close. Which of the following reason suits the best?
Answer» The smell of hot sizzling food reaches several metres away, but to get the smell from cold food, we have to go close. Which of the following reason suits the best?

Discussion

71.	A body of mass m is thrown at an angle θ to the horizontal with the initial velocity u. Find the mean power developed by gravity over the whole time of motion of the body?
Answer» A body of mass m is thrown at an angle θ to the horizontal with the initial velocity u. Find the mean power developed by gravity over the whole time of motion of the body?

Discussion

72.	A straight wire carrying current acts like a magnet. Then why is a coil of wire used in an electromagnet instead of just a straight wire?
Answer» A straight wire carrying current acts like a magnet. Then why is a coil of wire used in an electromagnet instead of just a straight wire?

Discussion

73.	Give an example each of a change that involves:(a) A change in colour(b) Evolution of a gas(c) Production of sound
Answer» Give an example each of a change that involves: (a) A change in colour (b) Evolution of a gas (c) Production of sound

Discussion

74.	The dried up rivers which have been revived are:
Answer» The dried up rivers which have been revived are:

Discussion

75.	73. If u=10m/s then stopping distance=30m.If u=20m/s then stopping distance is ?
Answer» 73. If u=10m/s then stopping distance=30m.If u=20m/s then stopping distance is ?

Discussion

76.	Sometimes, a crackling sound is heard while taking off a sweater during winters. Explain.
Answer» Sometimes, a crackling sound is heard while taking off a sweater during winters. Explain.

Discussion

77.	If a Person moves from point(0,-5) to (5,0),then he moves to a point (5,0).Then what will be the displacement and distance travelled in the case.
Answer» If a Person moves from point(0,-5) to (5,0),then he moves to a point (5,0).Then what will be the displacement and distance travelled in the case.

Discussion

78.	What is the difference between weight of the object and gravitational force ?
Answer» What is the difference between weight of the object and gravitational force ?

Discussion

79.	In east summer, storms are known as:
Answer» In east summer, storms are known as:

Discussion

80.	For the graph given below choose the correct option : Table ATable Ba) Line Ai) Accelerated Motionb) Line Bii) Constant velocity (high magnitude)c) Curve Ciii) At restd) Line Eiv) Constant Velocity (low magnitude)
Answer» For the graph given below choose the correct option : $\begin{matrix} Table A & Table B a) Line A & i) Accelerated Motion b) Line B & ii) Constant velocity (high magnitude) c) Curve C & iii) At rest d) Line E & iv) Constant Velocity (low magnitude) \end{matrix}$

80.

For the graph given below choose the correct option : Table ATable Ba) Line Ai) Accelerated Motionb) Line Bii) Constant velocity (high magnitude)c) Curve Ciii) At restd) Line Eiv) Constant Velocity (low magnitude)

Answer»

For the graph given below choose the correct option :

$\begin{matrix} Table A & Table B a) Line A & i) Accelerated Motion b) Line B & ii) Constant velocity (high magnitude) c) Curve C & iii) At rest d) Line E & iv) Constant Velocity (low magnitude) \end{matrix}$

Discussion

81.	Which of the following is the force at a distance?
Answer» Which of the following is the force at a distance?

Discussion

82.	A bus decreases its speed from 80 km/hr to 60 km/hr in 5 sec. Find the deceleration of the bus.
Answer» A bus decreases its speed from 80 km/hr to 60 km/hr in 5 sec. Find the deceleration of the bus.

Discussion

83.	Why do telephone wires sag in summer ?
Answer» Why do telephone wires sag in summer ?

Discussion

84.	In a hydroelectric power plant, more electrical power can be generated if the water falls from a greater height, because ____.
Answer» In a hydroelectric power plant, more electrical power can be generated if the water falls from a greater height, because ____.

Discussion

85.	On a bright sunny day, Shikha was playing hide and seek with her brother. She hid herself behind a glass door. Do you think her brother will be able to locate her? If yes, why? If no, why not?
Answer» On a bright sunny day, Shikha was playing hide and seek with her brother. She hid herself behind a glass door. Do you think her brother will be able to locate her? If yes, why? If no, why not?

Discussion

86.	a particle moves from point p (1,2,3) to Q(2,1,4) under the action of a constant force F=(2i+j+k) N work done by the force is
Answer» a particle moves from point p (1,2,3) to Q(2,1,4) under the action of a constant force F=(2i+j+k) N work done by the force is

Discussion

87.	44 Calculate root mean square speed, average speed and most probable speed of O2 if it's density is 0.0081 g/ml at 1 atm.
Answer» 44 Calculate root mean square speed, average speed and most probable speed of O2 if it's density is 0.0081 g/ml at 1 atm.

Discussion

88.	A uniform ladder of length 3.25m and weighing 250N is placed against a smooth vertical wall with its lower end 1.25m from the wall. If coefficient of friction between the ladder and the floor is 0.3, then find the frictional force acting on the ladder at the point of contact between ladder and floor.
Answer» A uniform ladder of length 3.25m and weighing 250N is placed against a smooth vertical wall with its lower end 1.25m from the wall. If coefficient of friction between the ladder and the floor is 0.3, then find the frictional force acting on the ladder at the point of contact between ladder and floor.

Discussion

89.	{\vec A is a vector of magnitude }2.7 units due east }}{ is the magnitude and direction of vector }4\vec A ?
Answer» {\vec A is a vector of magnitude }2.7 units due east }}{ is the magnitude and direction of vector }4\vec A ?

Discussion

90.	State the factors on which the frequency of a tuning fork depends.
Answer» State the factors on which the frequency of a tuning fork depends.

Discussion

91.	a satelite of mass m is in the orbit round the earth at a dis†an ce 2.5 R above its surface .if gravitationa\ln field strenth at surface of earth is g calculate the centripetal force acting on the satelite
Answer» a satelite of mass m is in the orbit round the earth at a dis†an ce 2.5 R above its surface .if gravitationa\ln field strenth at surface of earth is g calculate the centripetal force acting on the satelite

Discussion

92.	What will absorb heat?Steel spoon, wooden board, glass vessel, iron griddle (tava) , glass, wooden spoon , plastic plate, soil, water, wax
Answer» What will absorb heat? Steel spoon, wooden board, glass vessel, iron griddle (tava) , glass, wooden spoon , plastic plate, soil, water, wax

Discussion

93.	Which out of the following is the biggest unit of measuring time?
Answer» Which out of the following is the biggest unit of measuring time?

Discussion

94.	Sound cannot reach us from space why?
Answer» Sound cannot reach us from space why?

Discussion

95.	A hemispherical portion of the surface of a solid glass sphere( ref. index= 1.5) of radius r is silvered to make the inner side reflecting. An object is placed on the axis of the hemisphere at a dis†an ce 3r from the centre of the sphere. The light from the object is refracted at the unsilvered part, then reflected from the silvered part and again refracted at the unsilvered part. locate the fin al image formed.
Answer» A hemispherical portion of the surface of a solid glass sphere( ref. index= 1.5) of radius r is silvered to make the inner side reflecting. An object is placed on the axis of the hemisphere at a dis†an ce 3r from the centre of the sphere. The light from the object is refracted at the unsilvered part, then reflected from the silvered part and again refracted at the unsilvered part. locate the fin al image formed.

Discussion

96.	105.a body is projected at an angle 60^° with the horizontal ground with kinetic energy K. When the velocity makes an angle 30^° with the horizontal ,the horizontal ,the kinetic energy of the body will be
Answer» 105.a body is projected at an angle 60^° with the horizontal ground with kinetic energy K. When the velocity makes an angle 30^° with the horizontal ,the horizontal ,the kinetic energy of the body will be

Discussion

97.	Two identical bodies are made of a material for which the heat capacity increases with temperature. One of these is at 100^° C, while the other one is at 0^° C. If the two bodies are brought into contact, then assuming no heat loss, the final common temperature is (1) 50^° C(2) More than 50^° C(3) Less than 50^° C but greater than 0^° C(4) 0^° C
Answer» Two identical bodies are made of a material for which the heat capacity increases with temperature. One of these is at 100^° C, while the other one is at 0^° C. If the two bodies are brought into contact, then assuming no heat loss, the final common temperature is (1) 50^° C(2) More than 50^° C(3) Less than 50^° C but greater than 0^° C(4) 0^° C

Discussion

98.	Question 21We have a stringed musical instrument. The string is plucked in the middle first with a force of greater magnitude and then with a force of smaller magnitude. In which case would the instrument produce a louder sound?
Answer» Question 21 We have a stringed musical instrument. The string is plucked in the middle first with a force of greater magnitude and then with a force of smaller magnitude. In which case would the instrument produce a louder sound?

Discussion

99.	Which of the following statements is correct?
Answer» Which of the following statements is correct?

Discussion

100.	98. A student while going ti school bus observe the average speed of the bus to be 20km/h.Onhis return trip along the same way ,the average speed is 30km/h. Whatis the average speed of the bus in the entire journey
Answer» 98. A student while going ti school bus observe the average speed of the bus to be 20km/h.Onhis return trip along the same way ,the average speed is 30km/h. Whatis the average speed of the bus in the entire journey

Discussion

Explore topic-wise InterviewSolutions in .

Convert 22 m/s into km/h.

If the speed of a car is 20 ms−1, what is the speed in km h−1?72

A ball is thrown with an initial velocity of 20 m/s. Find the time of flight and the maximum height reached by the body. (Assume acceleration due to gravity g=10m/s2.

A gas exerts pressure on the walls of the container. Why?

Briefly explain droughts and floods.

The phenomenon in which left appears as right and vice versa in the image formation by a plane mirror is called ______.

Why does the metallic pan used for cooking has a plastic or wooden handle?

Which of the following can use an electric cell for working?

is electric flux conserved?

8. State Hess’s law of constant heat summation.

why tension in the string is electromagnetic force.

Give an everyday example which shows that heat is a form of energy.

Which force is strong gravitational or magnetic.

a capacitor C_1=1microF can withs†an d maximum voltage V_1=6KV and another capacitor of capaci†an ce C_2=3microF can withs†an d maximum voltage V_2=4KV,when the two capacitors are combined in series ,the combined system can stnad a maximum voltage of ?

A body travels a distance of 15 m from A to B and then moves a distance of 20 m at right angles to AB and move to C. Calculate the total distance and displacement?

Tyndall effect is the phenomenon of scattering of light by _________.

Law of refraction is also termed as ___

The wires A and B shown in the figure are made of the same material, and have radii rA and rB respectively. The block between them has a mass m. When the force F is mg/3, one of the wires breaks.

A vertical spring with force constant k is fixed on a table.A ball of mass m at a height h above the free upper end of the spring falls vertically on the spring,so that the spring is compressed by a distance d.What is the net work done in the process?

The smell of hot sizzling food reaches several metres away, but to get the smell from cold food, we have to go close. Which of the following reason suits the best?

A body of mass m is thrown at an angle θ to the horizontal with the initial velocity u. Find the mean power developed by gravity over the whole time of motion of the body?

A straight wire carrying current acts like a magnet. Then why is a coil of wire used in an electromagnet instead of just a straight wire?

Give an example each of a change that involves:(a) A change in colour(b) Evolution of a gas(c) Production of sound

The dried up rivers which have been revived are:

73. If u=10m/s then stopping distance=30m.If u=20m/s then stopping distance is ?

Sometimes, a crackling sound is heard while taking off a sweater during winters. Explain.

If a Person moves from point(0,-5) to (5,0),then he moves to a point (5,0).Then what will be the displacement and distance travelled in the case.

What is the difference between weight of the object and gravitational force ?

In east summer, storms are known as:

For the graph given below choose the correct option : Table ATable Ba) Line Ai) Accelerated Motionb) Line Bii) Constant velocity (high magnitude)c) Curve Ciii) At restd) Line Eiv) Constant Velocity (low magnitude)

Which of the following is the force at a distance?

A bus decreases its speed from 80 km/hr to 60 km/hr in 5 sec. Find the deceleration of the bus.

Why do telephone wires sag in summer ?

In a hydroelectric power plant, more electrical power can be generated if the water falls from a greater height, because ____.

On a bright sunny day, Shikha was playing hide and seek with her brother. She hid herself behind a glass door. Do you think her brother will be able to locate her? If yes, why? If no, why not?​

a particle moves from point p (1,2,3) to Q(2,1,4) under the action of a constant force F=(2i+j+k) N work done by the force is

44 Calculate root mean square speed, average speed and most probable speed of O2 if it's density is 0.0081 g/ml at 1 atm.

{\vec A is a vector of magnitude }2.7 units due east }}{ is the magnitude and direction of vector }4\vec A ?

State the factors on which the frequency of a tuning fork depends.

a satelite of mass m is in the orbit round the earth at a dis†an ce 2.5 R above its surface .if gravitationa\ln field strenth at surface of earth is g calculate the centripetal force acting on the satelite

What will absorb heat?Steel spoon, wooden board, glass vessel, iron griddle (tava) , glass, wooden spoon , plastic plate, soil, water, wax

Which out of the following is the biggest unit of measuring time?

Sound cannot reach us from space why?

105.a body is projected at an angle 60^° with the horizontal ground with kinetic energy K. When the velocity makes an angle 30^° with the horizontal ,the horizontal ,the kinetic energy of the body will be

Question 21We have a stringed musical instrument. The string is plucked in the middle first with a force of greater magnitude and then with a force of smaller magnitude. In which case would the instrument produce a louder sound?

Which of the following statements is correct?

98. A student while going ti school bus observe the average speed of the bus to be 20km/h.Onhis return trip along the same way ,the average speed is 30km/h. Whatis the average speed of the bus in the entire journey

On a bright sunny day, Shikha was playing hide and seek with her brother. She hid herself behind a glass door. Do you think her brother will be able to locate her? If yes, why? If no, why not?