9478 + Interview Questions in Physics Page 3 InterviewSolution

101.	How friction enables us to walk without slipping?
Answer» How friction enables us to walk without slipping?

Discussion

102.	what is the formula for †an gential acceleration
Answer» what is the formula for †an gential acceleration

Discussion

103.	What are shooting stars and how are they different from
Answer» What are shooting stars and how are they different from

Discussion

104.	two sound waves of wavelength lambda 1 and lambda 2 (lambda 2 is greater than lambda 1) produce n beat/s , the speed of sound is
Answer» two sound waves of wavelength lambda 1 and lambda 2 (lambda 2 is greater than lambda 1) produce n beat/s , the speed of sound is

Discussion

105.	Sound can travel through
Answer» Sound can travel through

Discussion

106.	A small paper ball is kept in the neck of a glass bottle held horizontally. Explain, why, it is difficult to force the paper ball into the bottle by blowing air into the bottle
Answer» A small paper ball is kept in the neck of a glass bottle held horizontally. Explain, why, it is difficult to force the paper ball into the bottle by blowing air into the bottle

Discussion

107.	hat is the curve between magnetic moment and the temperature of the magnet ?
Answer» hat is the curve between magnetic moment and the temperature of the magnet ?

Discussion

108.	what is the x-t graph of ball falling in free fall.
Answer» what is the x-t graph of ball falling in free fall.

Discussion

109.	if two forces act on a block in same direction then relative force will be given by subtraction of the two forces. but then why the forces add up to produce accceleratio
Answer» if two forces act on a block in same direction then relative force will be given by subtraction of the two forces. but then why the forces add up to produce accceleratio

Discussion

110.	A tuning for vibrating at frequency 800 Hz produces resonance in a resonance tube. The upper end is open, and the lower end is closed by the water surface, which can be varied. Successive resonance are observed at length 9.75 cm,31.25 cm and 52.75 cm. The speed (in m/s) of sound in air from these data is _____.
Answer» A tuning for vibrating at frequency $800 Hz$ produces resonance in a resonance tube. The upper end is open, and the lower end is closed by the water surface, which can be varied. Successive resonance are observed at length $9.75 cm, 31.25 cm and 52.75 cm$ . The speed $(in m/s)$ of sound in air from these data is _____.

Discussion

111.	Fill in the following blanks with suitable words : (a) Most liquids that conduct electricity are solutions of ___, ___ and ___ (b) LED glows even when a ___ electric current passes through it. (c) The passage of an electric current through a conducting solution causes ___ effect. (d) When electric current is passed through acidified water, then ___ and ___ are formed. (e) The process of depositing a layer of any desired metal on another metal by means of electricity is called ___ (f) If you pass current through copper sulphate solution, copper gets deposited on the plate connected to the ___ terminal of the battery.
Answer» Fill in the following blanks with suitable words : (a) Most liquids that conduct electricity are solutions of ___, ___ and ___ (b) LED glows even when a ___ electric current passes through it. (c) The passage of an electric current through a conducting solution causes ___ effect. (d) When electric current is passed through acidified water, then ___ and ___ are formed. (e) The process of depositing a layer of any desired metal on another metal by means of electricity is called ___ (f) If you pass current through copper sulphate solution, copper gets deposited on the plate connected to the ___ terminal of the battery.

Discussion

112.	The focal length of the eye lens changes due to the action of:
Answer» The focal length of the eye lens changes due to the action of:

Discussion

113.	A rectangular bar of soap has density 800 kg/m3 floats in water of density 1000 kg/m3. Bath oil of density 300 kg/m3 is slowly added, forming a layer that does not mix with the water. When the top surface of the oil is at the same level as the top surface of the soap, what is the ratio of the oil layer thickness to the soap's thickness, x/L?
Answer» A rectangular bar of soap has density 800 kg/m3 floats in water of density 1000 kg/m3. Bath oil of density 300 kg/m3 is slowly added, forming a layer that does not mix with the water. When the top surface of the oil is at the same level as the top surface of the soap, what is the ratio of the oil layer thickness to the soap's thickness, x/L?

Discussion

114.	The pitch of the sound is determined by _______.
Answer» The pitch of the sound is determined by _______.

Discussion

115.	Pick out the one from the options which is responsible for changing the point of application of force.
Answer» Pick out the one from the options which is responsible for changing the point of application of force.

Discussion

116.	19. If the distance between centres of earth and moonis D and mass of earth is 81 times the mass ofmoon then at what distance from centre of earthgravitational field is zero?2D(1)(2)34DTHEE)ru (+)
Answer» 19. If the distance between centres of earth and moonis D and mass of earth is 81 times the mass ofmoon then at what distance from centre of earthgravitational field is zero?2D(1)(2)34DTHEE)ru (+)

Discussion

117.	Freezing point of ethyl alcohol is 156 K which is equal to:
Answer» Freezing point of ethyl alcohol is 156 K which is equal to:

Discussion

118.	Question 5A tester is used to check the conduction of electricity through two liquids, labelled A and B. It is found that the bulb of the tester glows brightly for liquid A while it glows very dimly for liquid B. You would conclude that(i) liquid A is a better conductor than liquid B.(ii) liquid B is a better conductor than liquid A.(iii) both liquids are equally conducting.(iv) conducting properties of liquid cannot be compared in this manner.
Answer» Question 5 A tester is used to check the conduction of electricity through two liquids, labelled A and B. It is found that the bulb of the tester glows brightly for liquid A while it glows very dimly for liquid B. You would conclude that (i) liquid A is a better conductor than liquid B. (ii) liquid B is a better conductor than liquid A. (iii) both liquids are equally conducting. (iv) conducting properties of liquid cannot be compared in this manner.

Discussion

119.	During the electrolysis of molten sodium chloride, the time required to produce 0.10 mol of chlorine gas using a current of 3 amperes is
Answer» During the electrolysis of molten sodium chloride, the time required to produce 0.10 mol of chlorine gas using a current of 3 amperes is

Discussion

120.	Why do we sometimes feel an electric shock while opening the door of a car?
Answer» Why do we sometimes feel an electric shock while opening the door of a car?

Discussion

121.	84.An irrational number that lies between and is
Answer» 84.An irrational number that lies between and is

Discussion

122.	During electrolysis, why is it important to have the electrodes dipped in the electrolyte?
Answer» During electrolysis, why is it important to have the electrodes dipped in the electrolyte?

Discussion

123.	Suppose there is a tiny sticky area on the wall of a container of gas.Molecules hitting this area stick permanently.Is the pressure greater or less than on the ordinary area of the walls?
Answer» Suppose there is a tiny sticky area on the wall of a container of gas.Molecules hitting this area stick permanently.Is the pressure greater or less than on the ordinary area of the walls?

Discussion

124.	what is light,particle or wave??
Answer» what is light,particle or wave??

Discussion

125.	Identify the incorrect pairs of the animal and the sound it takes.
Answer» Identify the incorrect pairs of the animal and the sound it takes.

Discussion

126.	Why is there force ?
Answer» Why is there force ?

Discussion

127.	238 K = ___ degree Celsius
Answer» 238 K = ___ degree Celsius

Discussion

128.	Define diffusion and state the effect of temperature on diffusion. [2 Mark]
Answer» Define diffusion and state the effect of temperature on diffusion. [2 Mark]

Discussion

129.	When a dielectric slab is introduced between two plates of parallel plate capacitor,ten polarisation equal to?
Answer» When a dielectric slab is introduced between two plates of parallel plate capacitor,ten polarisation equal to?

Discussion

130.	Figure shows a circuit in which the potential differences across the resistance are given in the diagram. If point Q is grounded, then the potential at point S will be
Answer» Figure shows a circuit in which the potential differences across the resistance are given in the diagram. If point Q is grounded, then the potential at point S will be

Discussion

131.	A container with a mass of 5 kg is lifted to a height of 8 m. Work done by the gravitational force is equal to
Answer» A container with a mass of 5 kg is lifted to a height of 8 m. Work done by the gravitational force is equal to

Discussion

132.	On heating a liquid of coefficient of cubical expansion g in a container having coefficient of linear expansion [latex] \frac g3 [/altex] , the level of liquid in the container will
Answer» On heating a liquid of coefficient of cubical expansion g in a container having coefficient of linear expansion [latex] \frac g3 [/altex] , the level of liquid in the container will

132.

On heating a liquid of coefficient of cubical expansion g in a container having coefficient of linear expansion [latex] \frac g3 [/altex] , the level of liquid in the container will

Answer»

On heating a liquid of coefficient of cubical expansion g in a container having coefficient of linear expansion [latex] \frac g3 [/altex] , the level of liquid in the container will

Discussion

133.	What are the types of comets and on what basis are they classified?
Answer» What are the types of comets and on what basis are they classified?

Discussion

134.	What are all the types of media through which sound can propagate?
Answer» What are all the types of media through which sound can propagate?

Discussion

135.	Define the radius of curvature of a spherical mirror.If the radius of curvature of a spherical mirror is 20 cm, what is its focal length?
Answer» Define the radius of curvature of a spherical mirror. If the radius of curvature of a spherical mirror is 20 cm, what is its focal length?

Discussion

136.	If the displacement of a particle varies with time t as root x=t+7,then (1)velocity of a particle is inversly proportional to time (2)velocity of a particle is proportional to t2 (30VELOCITY OF A PARTICLE IS Proportional to root t (4) the partical moves with cons†an t acceleration.
Answer» If the displacement of a particle varies with time t as root x=t+7,then (1)velocity of a particle is inversly proportional to time (2)velocity of a particle is proportional to t2 (30VELOCITY OF A PARTICLE IS Proportional to root t (4) the partical moves with cons†an t acceleration.

Discussion

137.	Two equal resistances when connected in series to a battery, consume electric power of 100 W. If these resistances are now connected in parallel combination to the same battery, the electric power consumed will be
Answer» Two equal resistances when connected in series to a battery, consume electric power of $100 W$ . If these resistances are now connected in parallel combination to the same battery, the electric power consumed will be

Discussion

138.	In order to obtain a coating of silver metal on a flower vase made of copper, the electrolyte has to be : (a) silver nitrate solution (b) copper nitrate solution (c) sodium nitrate solution (d) copper sulphate solution
Answer» In order to obtain a coating of silver metal on a flower vase made of copper, the electrolyte has to be : (a) silver nitrate solution (b) copper nitrate solution (c) sodium nitrate solution (d) copper sulphate solution

Discussion

139.	A car travels half of the dis†an ce with cons†an t velocity of 40 km/h and another half with a cons†an t velocity of 60 km/h. what is the average velocity of the car
Answer» A car travels half of the dis†an ce with cons†an t velocity of 40 km/h and another half with a cons†an t velocity of 60 km/h. what is the average velocity of the car

Discussion

140.	When a rubber sucker is forced against a wall, the air between the sucker and the wall is forced out, creating a ________ in between.
Answer» When a rubber sucker is forced against a wall, the air between the sucker and the wall is forced out, creating a ________ in between.

Discussion

141.	8. Consider the reaction A (g) ->2B(g)+C. Starting with A total pressure at the end of 10min was 176mm and total pressure at the completion of reaction was found to be 270mm. Pressure of A at the end of 10min was
Answer» 8. Consider the reaction A (g) ->2B(g)+C. Starting with A total pressure at the end of 10min was 176mm and total pressure at the completion of reaction was found to be 270mm. Pressure of A at the end of 10min was

Discussion

142.	Statement 1: A kaleidoscope can produce numerous beautiful patterns of the object. Statement 2: In a kaleidoscope, three rectangular mirror strips are placed perpendicular to each other.
Answer» Statement 1: A kaleidoscope can produce numerous beautiful patterns of the object. Statement 2: In a kaleidoscope, three rectangular mirror strips are placed perpendicular to each other.

142.

Statement 1: A kaleidoscope can produce numerous beautiful patterns of the object. Statement 2: In a kaleidoscope, three rectangular mirror strips are placed perpendicular to each other.

Answer» Statement 1: A kaleidoscope can produce numerous beautiful patterns of the object.

Statement 2: In a kaleidoscope, three rectangular mirror strips are placed perpendicular to each other.

Discussion

143.	Question 1Illustarte the following effects of electric current:(a) Heating effect(b) Chemical effect(c) Magnetic effect
Answer» Question 1 Illustarte the following effects of electric current: (a) Heating effect (b) Chemical effect (c) Magnetic effect

Discussion

144.	a radioactive nuclei with decay cons†an t 0.5/sec is being produced at a cons†an t rate of 100 nuclie/sec if at t=0 there were no nuclie then the time when there are 50 nuclie 1)1 s 2)2\ln(4/3) 3)\ln2 4)n(4/3)
Answer» a radioactive nuclei with decay cons†an t 0.5/sec is being produced at a cons†an t rate of 100 nuclie/sec if at t=0 there were no nuclie then the time when there are 50 nuclie 1)1 s 2)2\ln(4/3) 3)\ln2 4)n(4/3)

Discussion

145.	Define diffusion and state the effect of temperature on diffusion.
Answer» Define diffusion and state the effect of temperature on diffusion.

Discussion

146.	How do electrons revolve around an atom or from where do they get the energy to do so?
Answer» How do electrons revolve around an atom or from where do they get the energy to do so?

Discussion

147.	Why do we pucker our lips when blowing out a candle?
Answer» Why do we pucker our lips when blowing out a candle?

Discussion

148.	will a leclanche cell provide a cons†an t cell potential?
Answer» will a leclanche cell provide a cons†an t cell potential?

Discussion

149.	The large gap between the orbits of Mars and Jupiter is occupied by some celestial bodies, which revolve around the Sun. These celestial bodies are known as _____.
Answer» The large gap between the orbits of Mars and Jupiter is occupied by some celestial bodies, which revolve around the Sun. These celestial bodies are known as _____.

Discussion

150.	Whe need grip in our shoes for friction but our bare foot does not need it ?why
Answer» Whe need grip in our shoes for friction but our bare foot does not need it ?why

Discussion

Explore topic-wise InterviewSolutions in .

How friction enables us to walk without slipping?

what is the formula for †an gential acceleration

What are shooting stars and how are they different from

two sound waves of wavelength lambda 1 and lambda 2 (lambda 2 is greater than lambda 1) produce n beat/s , the speed of sound is

Sound can travel through

A small paper ball is kept in the neck of a glass bottle held horizontally. Explain, why, it is difficult to force the paper ball into the bottle by blowing air into the bottle

hat is the curve between magnetic moment and the temperature of the magnet ?

what is the x-t graph of ball falling in free fall.

if two forces act on a block in same direction then relative force will be given by subtraction of the two forces. but then why the forces add up to produce accceleratio

The focal length of the eye lens changes due to the action of:

The pitch of the sound is determined by _______.

Pick out the one from the options which is responsible for changing the point of application of force.

19. If the distance between centres of earth and moonis D and mass of earth is 81 times the mass ofmoon then at what distance from centre of earthgravitational field is zero?2D(1)(2)34DTHEE)ru (+)

Freezing point of ethyl alcohol is 156 K which is equal to:

During the electrolysis of molten sodium chloride, the time required to produce 0.10 mol of chlorine gas using a current of 3 amperes is

Why do we sometimes feel an electric shock while opening the door of a car?

84.An irrational number that lies between and is

During electrolysis, why is it important to have the electrodes dipped in the electrolyte?

Suppose there is a tiny sticky area on the wall of a container of gas.Molecules hitting this area stick permanently.Is the pressure greater or less than on the ordinary area of the walls?

what is light,particle or wave??

Identify the incorrect pairs of the animal and the sound it takes.

Why is there force ?

238 K = ___ degree Celsius

Define diffusion and state the effect of temperature on diffusion. [2 Mark]

When a dielectric slab is introduced between two plates of parallel plate capacitor,ten polarisation equal to?

Figure shows a circuit in which the potential differences across the resistance are given in the diagram. If point Q is grounded, then the potential at point S will be

A container with a mass of 5 kg is lifted to a height of 8 m. Work done by the gravitational force is equal to

On heating a liquid of coefficient of cubical expansion g in a container having coefficient of linear expansion [latex] \frac g3 [/altex] , the level of liquid in the container will

What are the types of comets and on what basis are they classified?

What are all the types of media through which sound can propagate?

Define the radius of curvature of a spherical mirror.If the radius of curvature of a spherical mirror is 20 cm, what is its focal length?

If the displacement of a particle varies with time t as root x=t+7,then (1)velocity of a particle is inversly proportional to time (2)velocity of a particle is proportional to t2 (30VELOCITY OF A PARTICLE IS Proportional to root t (4) the partical moves with cons†an t acceleration.

Two equal resistances when connected in series to a battery, consume electric power of 100 W. If these resistances are now connected in parallel combination to the same battery, the electric power consumed will be

In order to obtain a coating of silver metal on a flower vase made of copper, the electrolyte has to be : (a) silver nitrate solution (b) copper nitrate solution (c) sodium nitrate solution (d) copper sulphate solution

A car travels half of the dis†an ce with cons†an t velocity of 40 km/h and another half with a cons†an t velocity of 60 km/h. what is the average velocity of the car

When a rubber sucker is forced against a wall, the air between the sucker and the wall is forced out, creating a ________ in between.

8. Consider the reaction A (g) ->2B(g)+C. Starting with A total pressure at the end of 10min was 176mm and total pressure at the completion of reaction was found to be 270mm. Pressure of A at the end of 10min was

Statement 1: A kaleidoscope can produce numerous beautiful patterns of the object. Statement 2: In a kaleidoscope, three rectangular mirror strips are placed perpendicular to each other.

Question 1Illustarte the following effects of electric current:(a) Heating effect(b) Chemical effect(c) Magnetic effect

a radioactive nuclei with decay cons†an t 0.5/sec is being produced at a cons†an t rate of 100 nuclie/sec if at t=0 there were no nuclie then the time when there are 50 nuclie 1)1 s 2)2\ln(4/3) 3)\ln2 4)n(4/3)

Define diffusion and state the effect of temperature on diffusion.

How do electrons revolve around an atom or from where do they get the energy to do so?

Why do we pucker our lips when blowing out a candle?

will a leclanche cell provide a cons†an t cell potential?

The large gap between the orbits of Mars and Jupiter is occupied by some celestial bodies, which revolve around the Sun. These celestial bodies are known as _____.

Whe need grip in our shoes for friction but our bare foot does not need it ?why