3752 + Interview Questions in Physics Page 3 InterviewSolution

101.	A single conservative force Fx acts on a 2 kg particle that moves along the x-axis. Potential energy is given by U=(x-4)²-16. At x=6 m, kinetic energy of the particle is 8 Joule. Find the values of 'X' between which particle moves.
Answer» A single conservative force Fx acts on a 2 kg particle that moves along the x-axis. Potential energy is given by U=(x-4)²-16. At x=6 m, kinetic energy of the particle is 8 Joule. Find the values of 'X' between which particle moves.

Discussion

102.	What is presice value?
Answer» What is presice value?

Discussion

103.	differecetiate between tyndal effect and brownanian motion
Answer» differecetiate between tyndal effect and brownanian motion

Discussion

104.	Question 81 hertz is equal to(a) 1 vibration per minute(b) 10 vibrations per minute(c) 60 vibrations per minute(d) 600 vibrations per minute
Answer» Question 8 1 hertz is equal to (a) 1 vibration per minute (b) 10 vibrations per minute (c) 60 vibrations per minute (d) 600 vibrations per minute

Discussion

105.	A long straight wire carries a cutrent of 35A .what is the magnitude of the field B at a point 20cm from the wire?
Answer» A long straight wire carries a cutrent of 35A .what is the magnitude of the field B at a point 20cm from the wire?

Discussion

106.	Fill inthe blanks in the following statements.(a) Todraw water from a well we have to _________at the rope.(b) Acharged body ________an uncharged body towards it.(c) Tomove a loaded trolley we have to _________it.(d) Thenorth pole of a magnet ________the north pole of another magnet.
Answer» Fill in the blanks in the following statements. (a) To draw water from a well we have to _________ at the rope. (b) A charged body ________ an uncharged body towards it. (c) To move a loaded trolley we have to _________ it. (d) The north pole of a magnet ________ the north pole of another magnet.

106.

Fill inthe blanks in the following statements.(a) Todraw water from a well we have to _____at the rope.(b) Acharged body an uncharged body towards it.(c) Tomove a loaded trolley we have to _it.(d) Thenorth pole of a magnet ____the north pole of another magnet.

Answer»

Fill in
the blanks in the following statements.

(a) To
draw water from a well we have to _________
at the rope.

(b) A
charged body ________
an uncharged body towards it.

(c) To
move a loaded trolley we have to _________
it.

(d) The
north pole of a magnet ________
the north pole of another magnet.

Discussion

107.	7. Given that, C=20uf C=20×10-6 V=2000u=?
Answer» 7. Given that, C=20uf C=20×10-6 V=2000u=?

Discussion

108.	A drum vibrates with a lower frequency than a whistle. Therefore, it produces a _________ sound compared to the whistle.
Answer» A drum vibrates with a lower frequency than a whistle. Therefore, it produces a _________ sound compared to the whistle.

Discussion

109.	While riding a bicycle, on a straight road:
Answer» While riding a bicycle, on a straight road:

Discussion

110.	Points A and B are situated perpendicular to the axis of a 2cm long bar magnet at large distances X and 3X from its centre on opposite sides. The ratio of the magnetic fields at A and B will be approximately equal to
Answer» Points A and B are situated perpendicular to the axis of a 2cm long bar magnet at large distances X and 3X from its centre on opposite sides. The ratio of the magnetic fields at A and B will be approximately equal to

Discussion

111.	(i) Draw the magnetic field lines of a spherical magnet.(ii) What happens to the field lines when a spherical magnet is rotated along its X-axis and y-axis?(iii) If it changes then what's the reason?
Answer» (i) Draw the magnetic field lines of a spherical magnet. (ii) What happens to the field lines when a spherical magnet is rotated along its X-axis and y-axis? (iii) If it changes then what's the reason?

Discussion

112.	Why are Machines oiled from time to time?
Answer» Why are Machines oiled from time to time?

Discussion

113.	A Cylindrical wire having resis†an ce R has a power dissipation P with an ideal cell of voltage E.The wire is cut into n parts of equal lenghs and all parts are connected in parallel with same cell .The new dissipation of the circuit is(1)np(2)p/n (3)n^2p (4)p/n
Answer» A Cylindrical wire having resis†an ce R has a power dissipation P with an ideal cell of voltage E.The wire is cut into n parts of equal lenghs and all parts are connected in parallel with same cell .The new dissipation of the circuit is(1)np(2)p/n (3)n^2p (4)p/n

Discussion

114.	How do we find the poles of a spherical shaped magnet?
Answer» How do we find the poles of a spherical shaped magnet?

Discussion

115.	The area of the rectangle with length 11 cm and breadth equal to half its length will be
Answer» The area of the rectangle with length $11 c m$ and breadth equal to half its length will be

Discussion

116.	Identify the translucent slab in the given picture:
Answer» Identify the translucent slab in the given picture:

Discussion

117.	___is casted on a screen, when an opaque body blocks light.
Answer» ___is casted on a screen, when an opaque body blocks light.

Discussion

118.	The radius of planet is twice the radius of earth.Both have almost equal average mass densities .If Vp and Ve are escape velocities of planet and tge earth,resp. then find realtion between Ve and V
Answer» The radius of planet is twice the radius of earth.Both have almost equal average mass densities .If Vp and Ve are escape velocities of planet and tge earth,resp. then find realtion between Ve and V

Discussion

119.	Three charged particles having charges q, -2q & q are placed in a line at points (-a,0), (0,0), (a,0) respectively.The expression for electric potential at P(r,0) for r>>a is
Answer» Three charged particles having charges q, -2q & q are placed in a line at points (-a,0), (0,0), (a,0) respectively.The expression for electric potential at P(r,0) for r>>a is

Discussion

120.	Which of the following tools is used to lift one side of a car or a truck?
Answer» Which of the following tools is used to lift one side of a car or a truck?

Discussion

121.	ample 13.7 Figure shows a hydraulic press with the larger piston of diameter 35 cm at a height of 1.5 m relative to the smaller piston of diameter 10 cm. The mass on the smaller piston is 20 kg. What is the force exerted on the load by the larger piston? The density of oil in the press is 750 kgm Take, g 9.8 ms) Ex 2
Answer» ample 13.7 Figure shows a hydraulic press with the larger piston of diameter 35 cm at a height of 1.5 m relative to the smaller piston of diameter 10 cm. The mass on the smaller piston is 20 kg. What is the force exerted on the load by the larger piston? The density of oil in the press is 750 kgm Take, g 9.8 ms) Ex 2

Discussion

122.	does speed have an effect on friction acting on the b
Answer» does speed have an effect on friction acting on the b

Discussion

123.	Salma always switches off electrical appliances such as lights, fans, air conditioners, heaters, etc. When not in use. She says it saves coal and petroleum and helps the environment. Do you agree? Explain
Answer» Salma always switches off electrical appliances such as lights, fans, air conditioners, heaters, etc. When not in use. She says it saves coal and petroleum and helps the environment. Do you agree? Explain

Discussion

124.	If the distance between earth and sun is increased by 2% then find percentage change in gravitational force acting between them.
Answer» If the distance between earth and sun is increased by 2% then find percentage change in gravitational force acting between them.

Discussion

125.	What kind of machine is the wheel of a flagpole?
Answer» What kind of machine is the wheel of a flagpole?

Discussion

126.	a force f is applied on the square plate of side .If the percentage error determining l=2% F=4%.Find mass percentage in pressure
Answer» a force f is applied on the square plate of side .If the percentage error determining l=2% F=4%.Find mass percentage in pressure

Discussion

127.	A substance exists in the solid state because(a) forces between its molecules are weak.(b) molecules are tightly packed.(c) molecules can move throughout the volume occupied by the substance.(d) molecules can move freely in the entire space available to them.
Answer» A substance exists in the solid state because (a) forces between its molecules are weak. (b) molecules are tightly packed. (c) molecules can move throughout the volume occupied by the substance. (d) molecules can move freely in the entire space available to them.

Discussion

128.	55. In the following part of a circuit i1 =5A di1/dt =3 i2 =2 di2/dt =-4 find Va -Vb
Answer» 55. In the following part of a circuit i1 =5A di1/dt =3 i2 =2 di2/dt =-4 find Va -Vb

Discussion

129.	19.Figure shows an LR circuit. When the switch S is closed the current through resistor R1,R2 And R3 are I1,I2 and I3 respectively. The value of I1,I2 and I3 at t=0 s is
Answer» 19.Figure shows an LR circuit. When the switch S is closed the current through resistor R1,R2 And R3 are I1,I2 and I3 respectively. The value of I1,I2 and I3 at t=0 s is

Discussion

130.	Why are man made satellites shadow are not falling on the earth?
Answer» Why are man made satellites shadow are not falling on the earth?

Discussion

131.	What are the properties of allotropes?
Answer» What are the properties of allotropes?

Discussion

132.	A charge q is to be distributed on two conductingspheres. What should be the value of the chargeson the spheres so that the repulsive forcebetween them is maximum when they are placedat a fixed distance from each other in air?
Answer» A charge q is to be distributed on two conductingspheres. What should be the value of the chargeson the spheres so that the repulsive forcebetween them is maximum when they are placedat a fixed distance from each other in air?

Discussion

133.	Rohan is pulling a trolley with a force of 25 N. The maximum friction that can be applied by the floor on the trolley is 60 N. What should be the minimum force that Rahul should apply to move the trolley?
Answer» Rohan is pulling a trolley with a force of $25 N$ . The maximum friction that can be applied by the floor on the trolley is $60 N$ . What should be the minimum force that Rahul should apply to move the trolley?

Discussion

134.	142.What are the physical significance of electric field.
Answer» 142.What are the physical significance of electric field.

Discussion

135.	This represents a:
Answer» This represents a:

135.

This represents a:

Answer»

This represents a:

Discussion

136.	Convert 5 hours to seconds
Answer» Convert 5 hours to seconds

Discussion

137.	Suggest some measures to reduce Noise pollution.
Answer» Suggest some measures to reduce Noise pollution.

Discussion

138.	Consider the following situation. Both A and B are at rest and the car is moving at 20 km/hr. The car appears to be in motion when seen by:
Answer» Consider the following situation. Both A and B are at rest and the car is moving at $20 k m / h r$ . The car appears to be in motion when seen by:

138.

Consider the following situation. Both A and B are at rest and the car is moving at 20 km/hr. The car appears to be in motion when seen by:

Answer»

Consider the following situation. Both A and B are at rest and the car is moving at $20 k m / h r$ .

The car appears to be in motion when seen by:

Discussion

139.	Pulleys are used to lift ___ objects.
Answer» Pulleys are used to lift ___ objects.

Discussion

140.	Name two natural sources of light and two human-made sources of light.
Answer» Name two natural sources of light and two human-made sources of light.

Discussion

141.	If the volumes of sales of plywood, saw timber and logs were 40%, 30% and 30% respectively, then what was the average realization in 1993 per cubic meter of sales? (One cubic meter of saw dust and plywood both = 800 kg)
Answer» If the volumes of sales of plywood, saw timber and logs were 40%, 30% and 30% respectively, then what was the average realization in 1993 per cubic meter of sales? (One cubic meter of saw dust and plywood both = 800 kg)

Discussion

142.	How do stars produce heat ?
Answer» How do stars produce heat ?

Discussion

143.	Only noise produces noise pollution. Do you agree? Give reasons.
Answer» Only noise produces noise pollution. Do you agree? Give reasons.

Discussion

144.	Question 46Length of a side of a square and its area vary directly with each other.
Answer» Question 46 Length of a side of a square and its area vary directly with each other.

144.

Question 46Length of a side of a square and its area vary directly with each other.

Answer»

Question 46

Length of a side of a square and its area vary directly with each other.

Discussion

145.	What is the order of rotation and angle of rotation of paralle\log ram
Answer» What is the order of rotation and angle of rotation of paralle\log ram

Discussion

146.	give the expression for velocity at the lowest point for circular motion of vertical loop
Answer» give the expression for velocity at the lowest point for circular motion of vertical loop

Discussion

147.	The motion of the moon around Earth is
Answer» The motion of the moon around Earth is

Discussion

148.	Cathode ray when applied to a magnetic field, which direction will the ray deflect
Answer» Cathode ray when applied to a magnetic field, which direction will the ray deflect

Discussion

149.	2. Find the conditions for the formation of real image in case ofspherical refracting surface.
Answer» 2. Find the conditions for the formation of real image in case ofspherical refracting surface.

Discussion

150.	A bar magnet was placed deep inside a sack of coal. Fine particles of coal got stuck to it. From this, can we infer that coal is attracted towards a magnet?
Answer» A bar magnet was placed deep inside a sack of coal. Fine particles of coal got stuck to it. From this, can we infer that coal is attracted towards a magnet?

Discussion

Explore topic-wise InterviewSolutions in .

A single conservative force Fx acts on a 2 kg particle that moves along the x-axis. Potential energy is given by U=(x-4)²-16. At x=6 m, kinetic energy of the particle is 8 Joule. Find the values of 'X' between which particle moves.

What is presice value?

differecetiate between tyndal effect and brownanian motion

Question 81 hertz is equal to(a) 1 vibration per minute(b) 10 vibrations per minute(c) 60 vibrations per minute(d) 600 vibrations per minute

A long straight wire carries a cutrent of 35A .what is the magnitude of the field B at a point 20cm from the wire?

Fill inthe blanks in the following statements.(a) Todraw water from a well we have to _________at the rope.(b) Acharged body ________an uncharged body towards it.(c) Tomove a loaded trolley we have to _________it.(d) Thenorth pole of a magnet ________the north pole of another magnet.

7. Given that, C=20uf C=20×10-6 V=2000u=?

A drum vibrates with a lower frequency than a whistle. Therefore, it produces a _________ sound compared to the whistle.

While riding a bicycle, on a straight road:

Points A and B are situated perpendicular to the axis of a 2cm long bar magnet at large distances X and 3X from its centre on opposite sides. The ratio of the magnetic fields at A and B will be approximately equal to

(i) Draw the magnetic field lines of a spherical magnet.(ii) What happens to the field lines when a spherical magnet is rotated along its X-axis and y-axis?(iii) If it changes then what's the reason?

Why are Machines oiled from time to time?

A Cylindrical wire having resis†an ce R has a power dissipation P with an ideal cell of voltage E.The wire is cut into n parts of equal lenghs and all parts are connected in parallel with same cell .The new dissipation of the circuit is(1)np(2)p/n (3)n^2p (4)p/n

How do we find the poles of a spherical shaped magnet?

The area of the rectangle with length 11 cm and breadth equal to half its length will be

Identify the translucent slab in the given picture:

___is casted on a screen, when an opaque body blocks light.

The radius of planet is twice the radius of earth.Both have almost equal average mass densities .If Vp and Ve are escape velocities of planet and tge earth,resp. then find realtion between Ve and V

Three charged particles having charges q, -2q & q are placed in a line at points (-a,0), (0,0), (a,0) respectively.The expression for electric potential at P(r,0) for r>>a is

Which of the following tools is used to lift one side of a car or a truck?

does speed have an effect on friction acting on the b

Salma always switches off electrical appliances such as lights, fans, air conditioners, heaters, etc. When not in use. She says it saves coal and petroleum and helps the environment. Do you agree? Explain

If the distance between earth and sun is increased by 2% then find percentage change in gravitational force acting between them.

What kind of machine is the wheel of a flagpole?

a force f is applied on the square plate of side .If the percentage error determining l=2% F=4%.Find mass percentage in pressure

A substance exists in the solid state because(a) forces between its molecules are weak.(b) molecules are tightly packed.(c) molecules can move throughout the volume occupied by the substance.(d) molecules can move freely in the entire space available to them.

55. In the following part of a circuit i1 =5A di1/dt =3 i2 =2 di2/dt =-4 find Va -Vb

19.Figure shows an LR circuit. When the switch S is closed the current through resistor R1,R2 And R3 are I1,I2 and I3 respectively. The value of I1,I2 and I3 at t=0 s is

Why are man made satellites shadow are not falling on the earth?

What are the properties of allotropes?

A charge q is to be distributed on two conductingspheres. What should be the value of the chargeson the spheres so that the repulsive forcebetween them is maximum when they are placedat a fixed distance from each other in air?

Rohan is pulling a trolley with a force of 25 N. The maximum friction that can be applied by the floor on the trolley is 60 N. What should be the minimum force that Rahul should apply to move the trolley?

142.What are the physical significance of electric field.

This represents a:

Convert 5 hours to seconds

Suggest some measures to reduce Noise pollution.

Consider the following situation. Both A and B are at rest and the car is moving at 20 km/hr. The car appears to be in motion when seen by:

Pulleys are used to lift ___ objects.

Name two natural sources of light and two human-made sources of light.

If the volumes of sales of plywood, saw timber and logs were 40%, 30% and 30% respectively, then what was the average realization in 1993 per cubic meter of sales? (One cubic meter of saw dust and plywood both = 800 kg)

How do stars produce heat ?

Only noise produces noise pollution. Do you agree? Give reasons.

Question 46Length of a side of a square and its area vary directly with each other.

What is the order of rotation and angle of rotation of paralle\log ram

give the expression for velocity at the lowest point for circular motion of vertical loop

The motion of the moon around Earth is

Cathode ray when applied to a magnetic field, which direction will the ray deflect

2. Find the conditions for the formation of real image in case ofspherical refracting surface.

A bar magnet was placed deep inside a sack of coal. Fine particles of coal got stuck to it. From this, can we infer that coal is attracted towards a magnet?

Fill inthe blanks in the following statements.(a) Todraw water from a well we have to _____at the rope.(b) Acharged body an uncharged body towards it.(c) Tomove a loaded trolley we have to _it.(d) Thenorth pole of a magnet ____the north pole of another magnet.