6277 + Interview Questions in Physics Page 3 InterviewSolution

101.	on atemperature scale Y, water freezes at -160 degree Y,and boils at 50 degree y . on this scale a temperature of 340 k is
Answer» on atemperature scale Y, water freezes at -160 degree Y,and boils at 50 degree y . on this scale a temperature of 340 k is

Discussion

102.	In a secondary cell chemical reaction is ___
Answer» In a secondary cell chemical reaction is ___

Discussion

103.	Why iron is used in zinc coating in process of galvanisation not others metal(more reactive than iron)
Answer» Why iron is used in zinc coating in process of galvanisation not others metal(more reactive than iron)

Discussion

104.	The distance s described by a particle in t seconds is given by s=aet+bet. Then the acceleration of the particle at time t is equal to _____________.
Answer» The distance s described by a particle in t seconds is given by $s = a e^{t} + \frac{b}{e^{t}}$ . Then the acceleration of the particle at time t is equal to _____________.

Discussion

105.	The planet which has the longest period of revolution is ___
Answer» The planet which has the longest period of revolution is ___

Discussion

106.	What will happen if you directly join the two terminals of a cell without connecting them to a switch or a bulb? [1 MARK]
Answer» What will happen if you directly join the two terminals of a cell without connecting them to a switch or a bulb? [1 MARK]

Discussion

107.	Two uniformly charged parallel plates having charged densities +o and -o are placed in the XZ plane at a distance ‘d’ apart (i) sketch the equipotential surface due to electric field between the plates. (ii) If a particle of mass m and charge –q, remains stationary between the plates, what is the magnitude and the direction of this field?
Answer» Two uniformly charged parallel plates having charged densities +o and -o are placed in the XZ plane at a distance ‘d’ apart (i) sketch the equipotential surface due to electric field between the plates. (ii) If a particle of mass m and charge –q, remains stationary between the plates, what is the magnitude and the direction of this field?

Discussion

108.	A mass m is placed at point P lies on the axis of a ring of mass M and radius R at a distance R from its centre. The Gravitational force on mass
Answer» A mass m is placed at point P lies on the axis of a ring of mass M and radius R at a distance R from its centre. The Gravitational force on mass

Discussion

109.	With the increase in energy of the air molecules, the space required to accommodate the molecules _____________.
Answer» With the increase in energy of the air molecules, the space required to accommodate the molecules _____________.

Discussion

110.	A rolling football will undergo:
Answer» A rolling football will undergo:

Discussion

111.	Why are radiators in cars painted Black?
Answer» Why are radiators in cars painted Black?

Discussion

112.	How does increase intemperature leads to increase in speed of sound?
Answer» How does increase intemperature leads to increase in speed of sound?

Discussion

113.	The direction in which the magnets align themselves when suspended in air is :
Answer» The direction in which the magnets align themselves when suspended in air is :

Discussion

114.	ntIf the time taken by a particle, moving at a constant accleration , to cover equal distance along a straight line are t1 , t2,t3 respectively. PROVE THat (1/t1)-(1/t2)+(1/t3)=3/(t1+t2+t3).n
Answer» ntIf the time taken by a particle, moving at a constant accleration , to cover equal distance along a straight line are t1 , t2,t3 respectively. PROVE THat (1/t1)-(1/t2)+(1/t3)=3/(t1+t2+t3).n

Discussion

115.	Explain the associations that the colour 'white' has in the story.
Answer» Explain the associations that the colour 'white' has in the story.

Discussion

116.	A cylinder is placed on a rough inclined surface of inclination '0'. Minimum value of coefficient of staticfriction between cylinder and surface so thatcylinder undergoes pure rolling is
Answer» A cylinder is placed on a rough inclined surface of inclination '0'. Minimum value of coefficient of static friction between cylinder and surface so that cylinder undergoes pure rolling is

Discussion

117.	In a practical unit ,the unit of mass becomes double and unit of time becomes half then 8J will be equal to how much unit of work?
Answer» In a practical unit ,the unit of mass becomes double and unit of time becomes half then 8J will be equal to how much unit of work?

Discussion

118.	Question 11 (v)State whether the following statements are True/False.Bathing outdoors should be avoided during the thunderstorm.
Answer» Question 11 (v) State whether the following statements are True/False. Bathing outdoors should be avoided during the thunderstorm.

118.

Question 11 (v)State whether the following statements are True/False.Bathing outdoors should be avoided during the thunderstorm.

Answer»

Question 11 (v)

State whether the following statements are True/False.

Bathing outdoors should be avoided during the thunderstorm.

Discussion

119.	The acceleration of a car moving in positive x−direction with an initial velocity of 6 m/s is 4 m/s2. Its velocity at t=5 sec is
Answer» The acceleration of a car moving in positive $x -$ direction with an initial velocity of $6 m / s$ is $4 m / s^{2}$ . Its velocity at $t = 5 s e c$ is

Discussion

120.	If the temperature fell by 1 ½ °C from –2 ½ °C , then what is the current temperature?
Answer» If the temperature fell by 1 ½ °C from –2 ½ °C , then what is the current temperature?

Discussion

121.	why is electric current specified as a scalar quantity ? but it has a direction/path which it follows (wire) , so why it isn't a vector quantity.
Answer» why is electric current specified as a scalar quantity ? but it has a direction/path which it follows (wire) , so why it isn't a vector quantity.

Discussion

122.	is only chemical equilibrium occurs in gases compounds2.is law of mass action apply only for gases compounds
Answer» is only chemical equilibrium occurs in gases compounds 2.is law of mass action apply only for gases compounds

Discussion

123.	Categorize the following motion as being either an example of positive(+ve) or negative(-ve) acceleration.i. Speeding up the motion = ___ii. Slowing down the motion = ___
Answer» Categorize the following motion as being either an example of positive(+ve) or negative(-ve) acceleration. i. Speeding up the motion = ___ ii. Slowing down the motion = ___

Discussion

124.	An artificial planet is moving in a circular orbit of radius 42250km. Calculate its speed if it takes 24hours to revolve around the earth.
Answer» An artificial planet is moving in a circular orbit of radius $42250 k m$ . Calculate its speed if it takes $24 hours$ to revolve around the earth.

Discussion

125.	A man carrying a bag of mass 25 kg climbs up to a height of 10 m in 50 s. The power delivered by him to the bag is [ Take g=9.8 m/s2 ]
Answer» A man carrying a bag of mass $25 kg$ climbs up to a height of $10 m$ in $50 s$ . The power delivered by him to the bag is $[Take g = 9.8 {m/s}^{2}]$

Discussion

126.	What is focal length?
Answer» What is focal length?

Discussion

127.	Find the equivalent resistance of the circuit if every resistor is of 4Ω.
Answer» Find the equivalent resistance of the circuit if every resistor is of 4Ω.

127.

Find the equivalent resistance of the circuit if every resistor is of 4Ω.

Answer»

Find the equivalent resistance of the circuit if every resistor is of 4Ω.

Discussion

128.	The value of △ S for freezing of 10 g of H_2O_{(l) }( enthalpy of fusion is 80 cal/g) at 0^0 C and 1 atm pressure is (1) 12.25 J/K (2) -0.244 J/K (30 -2.93 J/K (4) -12.25 J/K.
Answer» The value of △ S for freezing of 10 g of H_2O_{(l) }( enthalpy of fusion is 80 cal/g) at 0^0 C and 1 atm pressure is (1) 12.25 J/K (2) -0.244 J/K (30 -2.93 J/K (4) -12.25 J/K.

Discussion

129.	Do concave mirror converges or diverges the light?
Answer» Do concave mirror converges or diverges the light?

Discussion

130.	Two concave mirrors are kept on the either side of a candle such that, the focus of one mirror coincides with the center of curvature of the other mirror as shown in figure.Explain:(i) Nature of the image of the candle formed by both the mirrors.(ii) Nature of the image after one reflection in each mirror.
Answer» Two concave mirrors are kept on the either side of a candle such that, the focus of one mirror coincides with the center of curvature of the other mirror as shown in figure. Explain: (i) Nature of the image of the candle formed by both the mirrors. (ii) Nature of the image after one reflection in each mirror.

130.

Two concave mirrors are kept on the either side of a candle such that, the focus of one mirror coincides with the center of curvature of the other mirror as shown in figure.Explain:(i) Nature of the image of the candle formed by both the mirrors.(ii) Nature of the image after one reflection in each mirror.

Answer» Two concave mirrors are kept on the either side of a candle such that, the focus of one mirror coincides with the center of curvature of the other mirror as shown in figure.

Explain:

(i) Nature of the image of the candle formed by both the mirrors.

(ii) Nature of the image after one reflection in each mirror.

Discussion

131.	Find the work done by the force →F=x2 ^i+2y ^j on a particle moving around the path OABCO completing one full cycle.
Answer» Find the work done by the force $\to F = x^{2}^i + 2 y^j$ on a particle moving around the path $OABCO$ completing one full cycle.

Discussion

132.	The traffic flow has relationship between speed ( U in kmph) and density (k in vpkm) as U=40- 0.3k. The maximum flow is ________ vehicles per hour.1334
Answer» The traffic flow has relationship between speed ( U in kmph) and density (k in vpkm) as U=40- 0.3k. The maximum flow is ________ vehicles per hour. 1334

Discussion

133.	The coefficient of linear expansion of silver is 18 ×10-6 per °C. What do you understand by this
Answer» The coefficient of linear expansion of silver is 18 ×10^-6 per °C. What do you understand by this

Discussion

134.	Electric field due to infinite non conducting sheet of surface charge density sigma at a distance r from it is
Answer» Electric field due to infinite non conducting sheet of surface charge density sigma at a distance r from it is

Discussion

135.	The specific resis†an ce of a wire is ρ its volume is 3m and its resis†an ce is 3 ohms then its length will be
Answer» The specific resis†an ce of a wire is ρ its volume is 3m and its resis†an ce is 3 ohms then its length will be

Discussion

136.	Question 15 State the correct sequence (1-7) of colours in the spectrum formed by the prisms A and B, shown in Figure.
Answer» Question 15 State the correct sequence (1-7) of colours in the spectrum formed by the prisms A and B, shown in Figure.

136.

Question 15 State the correct sequence (1-7) of colours in the spectrum formed by the prisms A and B, shown in Figure.

Answer»

Question 15

State the correct sequence (1-7) of colours in the spectrum formed by the prisms A and B, shown in Figure.

Discussion

137.	In the process of convection, how is heat carried from the hot to the cold part?
Answer» In the process of convection, how is heat carried from the hot to the cold part?

Discussion

138.	Why is the base of thin copper cooking vessels given a coat of mud on the outside?
Answer» Why is the base of thin copper cooking vessels given a coat of mud on the outside?

Discussion

139.	In our household circuit, appliances are always implemented in ___ connection.
Answer» In our household circuit, appliances are always implemented in ___ connection.

Discussion

140.	Answer the following questions.a. Explain the difference between a plane mirror, a concave mirror and a convex mirror with respect to the type and size of the images produced.b. Describe the positions of the source of light with respect to a concave mirror in1.Torch light2. Projector lamp3. Flood lightc. Why are concave mirrors used in solar devices?d. Why are the mirrors fitted on the outside of cars convex?e. Why does obtaining the image of the sun on a paper with the help of a concave mirror burn the paper?f. If a spherical mirror breaks, what type of mirrors are the individual pieces?
Answer» Answer the following questions. a. Explain the difference between a plane mirror, a concave mirror and a convex mirror with respect to the type and size of the images produced. b. Describe the positions of the source of light with respect to a concave mirror in 1.Torch light 2. Projector lamp 3. Flood light c. Why are concave mirrors used in solar devices? d. Why are the mirrors fitted on the outside of cars convex? e. Why does obtaining the image of the sun on a paper with the help of a concave mirror burn the paper? f. If a spherical mirror breaks, what type of mirrors are the individual pieces?

Discussion

141.	What is a safety device to protest us from electric shock.
Answer» What is a safety device to protest us from electric shock.

Discussion

142.	3A particle moving in uniform circular motion undergoesan angular displacement a (less than 360^° ) from pointPto Q. Then angle between average velocity from Pto Q and velocity at Q is (1) 90- a/2 (2) 90- A (3) A(4) a/2
Answer» 3A particle moving in uniform circular motion undergoesan angular displacement a (less than 360^° ) from pointPto Q. Then angle between average velocity from Pto Q and velocity at Q is (1) 90- a/2 (2) 90- A (3) A(4) a/2

Discussion

143.	a hot body placed in air is cooled according to Newton's law of cooling,the rate of decrease of temperature being K times the temperature difference from the surroundings.starting from t=0,find the time in which the body will loss half the maximum temperature it can lose.
Answer» a hot body placed in air is cooled according to Newton's law of cooling,the rate of decrease of temperature being K times the temperature difference from the surroundings.starting from t=0,find the time in which the body will loss half the maximum temperature it can lose.

Discussion

144.	what does Einstein discovered about gravitation?
Answer» what does Einstein discovered about gravitation?

Discussion

145.	A spring of natural length L compressed to length 7L/8 exerts a force F. The work done by the spring restoring itself to natural length is(in terms of F and l)
Answer» A spring of natural length L compressed to length 7L/8 exerts a force F. The work done by the spring restoring itself to natural length is(in terms of F and l)

Discussion

146.	Sunlight consists of light of only one colour. Do you agree? Give reasons.
Answer» Sunlight consists of light of only one colour. Do you agree? Give reasons.

Discussion

147.	Himanshu wanted to boil water but he had run out of gas. He now has two options - either to use a black colored container or a white colored container to heat water under the sun.Which of the following is correct?
Answer» Himanshu wanted to boil water but he had run out of gas. He now has two options - either to use a black colored container or a white colored container to heat water under the sun. Which of the following is correct?

Discussion

148.	The reading of distance and time at point A in the given graph will be
Answer» The reading of distance and time at point A in the given graph will be

148.

The reading of distance and time at point A in the given graph will be

Answer»

The reading of distance and time at point A in the given graph will be

Discussion

149.	Which is the component that breaks the electric circuit in case of excess current?
Answer» Which is the component that breaks the electric circuit in case of excess current?

Discussion

150.	The measurements of the figure given below are in centimetres. What is its area?
Answer» The measurements of the figure given below are in centimetres. What is its area?

Discussion

Explore topic-wise InterviewSolutions in .

on atemperature scale Y, water freezes at -160 degree Y,and boils at 50 degree y . on this scale a temperature of 340 k is

In a secondary cell chemical reaction is ___

Why iron is used in zinc coating in process of galvanisation not others metal(more reactive than iron)

The distance s described by a particle in t seconds is given by s=aet+bet. Then the acceleration of the particle at time t is equal to _____________.

The planet which has the longest period of revolution is ___

What will happen if you directly join the two terminals of a cell without connecting them to a switch or a bulb? [1 MARK]

A mass m is placed at point P lies on the axis of a ring of mass M and radius R at a distance R from its centre. The Gravitational force on mass

With the increase in energy of the air molecules, the space required to accommodate the molecules _____________.

A rolling football will undergo:

Why are radiators in cars painted Black?

How does increase intemperature leads to increase in speed of sound?

The direction in which the magnets align themselves when suspended in air is :

ntIf the time taken by a particle, moving at a constant accleration , to cover equal distance along a straight line are t1 , t2,t3 respectively. PROVE THat (1/t1)-(1/t2)+(1/t3)=3/(t1+t2+t3).n

Explain the associations that the colour 'white' has in the story.

A cylinder is placed on a rough inclined surface of inclination '0'. Minimum value of coefficient of staticfriction between cylinder and surface so thatcylinder undergoes pure rolling is

In a practical unit ,the unit of mass becomes double and unit of time becomes half then 8J will be equal to how much unit of work?

Question 11 (v)State whether the following statements are True/False.Bathing outdoors should be avoided during the thunderstorm.

The acceleration of a car moving in positive x−direction with an initial velocity of 6 m/s is 4 m/s2. Its velocity at t=5 sec is

If the temperature fell by 1 ½ °C from –2 ½ °C , then what is the current temperature?

why is electric current specified as a scalar quantity ? but it has a direction/path which it follows (wire) , so why it isn't a vector quantity.

is only chemical equilibrium occurs in gases compounds2.is law of mass action apply only for gases compounds

Categorize the following motion as being either an example of positive(+ve) or negative(-ve) acceleration.i. Speeding up the motion = ___ii. Slowing down the motion = ___

An artificial planet is moving in a circular orbit of radius 42250km. Calculate its speed if it takes 24hours to revolve around the earth.

A man carrying a bag of mass 25 kg climbs up to a height of 10 m in 50 s. The power delivered by him to the bag is [ Take g=9.8 m/s2 ]

What is focal length?

Find the equivalent resistance of the circuit if every resistor is of 4Ω.

The value of △ S for freezing of 10 g of H_2O_{(l) }( enthalpy of fusion is 80 cal/g) at 0^0 C and 1 atm pressure is (1) 12.25 J/K (2) -0.244 J/K (30 -2.93 J/K (4) -12.25 J/K.

Do concave mirror converges or diverges the light?

Find the work done by the force →F=x2 ^i+2y ^j on a particle moving around the path OABCO completing one full cycle.

The traffic flow has relationship between speed ( U in kmph) and density (k in vpkm) as U=40- 0.3k. The maximum flow is ________ vehicles per hour.1334

The coefficient of linear expansion of silver is 18 ×10-6 per °C. What do you understand by this

Electric field due to infinite non conducting sheet of surface charge density sigma at a distance r from it is

The specific resis†an ce of a wire is ρ its volume is 3m and its resis†an ce is 3 ohms then its length will be

Question 15 State the correct sequence (1-7) of colours in the spectrum formed by the prisms A and B, shown in Figure.

In the process of convection, how is heat carried from the hot to the cold part?

Why is the base of thin copper cooking vessels given a coat of mud on the outside?

In our household circuit, appliances are always implemented in ___ connection.

What is a safety device to protest us from electric shock.

3A particle moving in uniform circular motion undergoesan angular displacement a (less than 360^° ) from pointPto Q. Then angle between average velocity from Pto Q and velocity at Q is (1) 90- a/2 (2) 90- A (3) A(4) a/2

a hot body placed in air is cooled according to Newton's law of cooling,the rate of decrease of temperature being K times the temperature difference from the surroundings.starting from t=0,find the time in which the body will loss half the maximum temperature it can lose.

what does Einstein discovered about gravitation?

A spring of natural length L compressed to length 7L/8 exerts a force F. The work done by the spring restoring itself to natural length is(in terms of F and l)

Sunlight consists of light of only one colour. Do you agree? Give reasons.

Himanshu wanted to boil water but he had run out of gas. He now has two options - either to use a black colored container or a white colored container to heat water under the sun.Which of the following is correct?

The reading of distance and time at point A in the given graph will be

Which is the component that breaks the electric circuit in case of excess current?

The measurements of the figure given below are in centimetres. What is its area?

Categorize the following motion as being either an example of positive(+ve) or negative(-ve) acceleration.i. Speeding up the motion = _ii. Slowing down the motion = _