16569 + Interview Questions in Physics Page 326 InterviewSolution

16251.	What is the cause of presbiopic defect?
Answer» What is the cause of presbiopic defect?

Discussion

16252.	How will you connect three resistors of resistance 2 Ω, 3 Ω and 6 Ω to obtain a total resistance of : (a) 4 Ω and (b) 1 Ω?
Answer» How will you connect three resistors of resistance $2 Ω$ , $3 Ω$ and $6 Ω$ to obtain a total resistance of : (a) $4 Ω$ and (b) $1 Ω$ ?

Discussion

16253.	A body is acted upon by two unequal forces in opposite directions, but not in same line, The effect is that : (a) the body will have only the rotational motion (b) the body will have only the translational motion (c) the body will have neither the rotational motion nor the translational motion (d) the body will have rotational as well as translational motion.
Answer» A body is acted upon by two unequal forces in opposite directions, but not in same line, The effect is that : (a) the body will have only the rotational motion (b) the body will have only the translational motion (c) the body will have neither the rotational motion nor the translational motion (d) the body will have rotational as well as translational motion.

16253.

A body is acted upon by two unequal forces in opposite directions, but not in same line, The effect is that : (a) the body will have only the rotational motion (b) the body will have only the translational motion (c) the body will have neither the rotational motion nor the translational motion (d) the body will have rotational as well as translational motion.

Answer»

A body is acted upon by two unequal forces in opposite directions, but not in same line, The effect is that :

(a) the body will have only the rotational motion

(b) the body will have only the translational motion

(c) the body will have neither the rotational motion nor the translational motion

(d) the body will have rotational as well as translational motion.

Discussion

16254.	Draw a ray diagram to show how a converging lens is used as a magnifying glass to observe a small object. Mark on your diagram the foci of the lens and the position of the eye.
Answer» Draw a ray diagram to show how a converging lens is used as a magnifying glass to observe a small object. Mark on your diagram the foci of the lens and the position of the eye.

Discussion

16255.	Question 5 (b) What is (b) the lowest total resistance that can be secured by combinations of four coils of resistance 4Ω,8Ω,12Ω and 24Ω?
Answer» Question 5 (b) What is (b) the lowest total resistance that can be secured by combinations of four coils of resistance $4 Ω, 8 Ω, 12 Ω$ and $24 Ω$ ?

Discussion

16256.	How is the volume of water affected when it boils at 100oC ?
Answer» How is the volume of water affected when it boils at $100^{o} C$ ?

Discussion

16257.	A doctor has prescribed a corrective lens of power +1.5 D to one of his patients. The focal length and the nature of the lens is
Answer» A doctor has prescribed a corrective lens of power +1.5 D to one of his patients. The focal length and the nature of the lens is

Discussion

16258.	What do the following symbols mean in circuit diagrams? (i) (ii)
Answer» What do the following symbols mean in circuit diagrams? (i) (ii)

Discussion

16259.	A diverging lens has a focal length of 3 cm. Calculate the power.
Answer» A diverging lens has a focal length of 3 cm. Calculate the power.

Discussion

16260.	The direction of current in the coil at one end of an electromagnet is clockwise. This end of the electromagnet will be : (a) north pole (b) east pole (c) south pole (d) west pole
Answer» The direction of current in the coil at one end of an electromagnet is clockwise. This end of the electromagnet will be : (a) north pole (b) east pole (c) south pole (d) west pole

16260.

The direction of current in the coil at one end of an electromagnet is clockwise. This end of the electromagnet will be : (a) north pole (b) east pole (c) south pole (d) west pole

Answer»

The direction of current in the coil at one end of an electromagnet is clockwise. This end of the electromagnet will be :

(a) north pole (b) east pole (c) south pole (d) west pole

Discussion

16261.	State the factor that determines (i) the pitch of a note, (ii) the loudness of the sound heard, and (iii) the quality of the note.
Answer» State the factor that determines (i) the pitch of a note, (ii) the loudness of the sound heard, and (iii) the quality of the note.

16261.

State the factor that determines (i) the pitch of a note, (ii) the loudness of the sound heard, and (iii) the quality of the note.

Answer»

State the factor that determines

(i) the pitch of a note,

(ii) the loudness of the sound heard, and

(iii) the quality of the note.

Discussion

16262.	a) Write the formula for the resistance of a wire of length L and cross-section A. b) A piece of wire is redrawn by pulling it until its length is doubled. Compare the new resistance with the original value. c) How many 176Ω resistors (in parallel) are required to carry 5 A in 220 V line? [5 MARKS]
Answer» a) Write the formula for the resistance of a wire of length L and cross-section A. b) A piece of wire is redrawn by pulling it until its length is doubled. Compare the new resistance with the original value. c) How many 176 $Ω$ resistors (in parallel) are required to carry 5 A in 220 V line? [5 MARKS]

Discussion

16263.	A particle covers a distance of 10 km in just 2 minutes. What is the speed at which the particle was traveling?
Answer» A particle covers a distance of 10 km in just 2 minutes. What is the speed at which the particle was traveling?

Discussion

16264.	Number of electrons in a charge of 16 C is
Answer» Number of electrons in a charge of 16 C is

Discussion

16265.	Can you make me understand the concept of refraction of light along with an example and a question?
Answer» Can you make me understand the concept of refraction of light along with an example and a question?

Discussion

16266.	Please explain me the use of rheostat and the types of rheostat.
Answer» Please explain me the use of rheostat and the types of rheostat.

Discussion

16267.	A wave source produces 20 crests and 20 troughs in 0.2 sec. Find the frequency of the wave.
Answer» A wave source produces $20$ crests and $20$ troughs in $0.2 s e c$ . Find the frequency of the wave.

Discussion

16268.	Mention the decade during which the Tava Dam was built? __
Answer» Mention the decade during which the Tava Dam was built? __

Discussion

16269.	A batsman hits 2 balls of different masses 0.5 kg and 1 kg out of the stadium. The velocity with which these balls travel is the same. What would be the ratio of their kinetic energies?
Answer» A batsman hits 2 balls of different masses 0.5 kg and 1 kg out of the stadium. The velocity with which these balls travel is the same. What would be the ratio of their kinetic energies?

Discussion

16270.	Why are real images always inverted and virtual images always erect?
Answer» Why are real images always inverted and virtual images always erect?

Discussion

16271.	Why different electrical appliances in a domestic circuit are connected in parallel?
Answer» Why different electrical appliances in a domestic circuit are connected in parallel?

Discussion

16272.	When a plane mirror is rotated through an angle θ then the reflected ray turns through the angle 2θ then the size of the image
Answer» When a plane mirror is rotated through an angle θ then the reflected ray turns through the angle 2θ then the size of the image

Discussion

16273.	The meaning of the following statement is: The specific heat capacity of copper is 0.4 J g-1 oC-1.
Answer» The meaning of the following statement is: The specific heat capacity of copper is 0.4 J g^-1 ^oC^-1.

16273.

The meaning of the following statement is: The specific heat capacity of copper is 0.4 J g-1 oC-1.

Answer»

The meaning of the following statement is:

The specific heat capacity of copper is 0.4 J g^-1 ^oC^-1.

Discussion

16274.	The average internal kinetic energy of molecules of a substance is a measure of _______ of that substance.
Answer» The average internal kinetic energy of molecules of a substance is a measure of _______ of that substance.

Discussion

16275.	The reisistivity of a certain material is 0.6Ω m. The material is most llikely to be: (a) an insulator (b) a superconductor (c) a conductor (d) a semiconductor
Answer» The reisistivity of a certain material is $0.6 Ω$ m. The material is most llikely to be: (a) an insulator (b) a superconductor (c) a conductor (d) a semiconductor

Discussion

16276.	The lowest temperature for a substance to be in a gaseous state is
Answer» The lowest temperature for a substance to be in a gaseous state is

Discussion

16277.	By adding some amount of ice, the temperature of 500 g of water at 50∘C, is lowered to 0∘C. If the specific heat capacity of water is 4.2 J g−1 K−1 and specific latent heat of ice is 336 J g−1, then find the mass of ice added to it.
Answer» By adding some amount of ice, the temperature of 500 g of water at $50^{\circ} C$ , is lowered to $0^{\circ} C$ . If the specific heat capacity of water is 4.2 J g⁻¹ K⁻¹and specific latent heat of ice is 336 J g⁻¹, then find the mass of ice added to it.

Discussion

16278.	An electrical appliance of R Ω resistance draws a current ‘I’ for time ‘t’. It is connected across a battery which offers a potential difference V. The energy consumed by the appliance is given by:
Answer» An electrical appliance of $R Ω$ resistance draws a current ‘I’ for time ‘t’. It is connected across a battery which offers a potential difference V. The energy consumed by the appliance is given by:

Discussion

16279.	Disadvantages of geothermal energy and thermal energy.
Answer» Disadvantages of geothermal energy and thermal energy.

Discussion

16280.	Why thick mirrors produce a number of images ?
Answer» Why thick mirrors produce a number of images ?

Discussion

16281.	Why dispersion of white light takes place only in a prism and not in glass slab?
Answer» Why dispersion of white light takes place only in a prism and not in glass slab?

Discussion

16282.	The electrical resistivity of four materials A ,B, C and D are given as A=110×10-8 ohm metre B=1×1010 ohm metre C=10×10-8 ohm metre D=2.3×103 ohm metre which material is 1) good material 2) resistor 3) insulator 4) semi-conductor Give reasons for your answer.
Answer» The electrical resistivity of four materials A ,B, C and D are given as A=110×10^-8 ohm metre B=1×10¹⁰ ohm metre C=10×10^-8ohm metre D=2.3×10³ ohm metre which material is 1) good material 2) resistor 3) insulator 4) semi-conductor Give reasons for your answer.

16282.

The electrical resistivity of four materials A ,B, C and D are given as A=110×10-8 ohm metre B=1×1010 ohm metre C=10×10-8 ohm metre D=2.3×103 ohm metre which material is 1) good material 2) resistor 3) insulator 4) semi-conductor Give reasons for your answer.

Answer»

The electrical resistivity of four materials A ,B, C and D are given as

A=110×10^-8 ohm metre

B=1×10¹⁰ ohm metre

C=10×10^-8ohm metre

D=2.3×10³ ohm metre

which material is

1) good material

2) resistor

3) insulator

4) semi-conductor

Give reasons for your answer.

Discussion

16283.	Can we conclude that overloading can be of 2 types:-●one in which current in circuit increases [ short circuit] And ● and another in which current in circuit decreases [ as sometimes voltage decreases]
Answer» Can we conclude that overloading can be of 2 types:-●one in which current in circuit increases [ short circuit] And ● and another in which current in circuit decreases [ as sometimes voltage decreases]

16283.

Can we conclude that overloading can be of 2 types:-●one in which current in circuit increases [ short circuit] And ● and another in which current in circuit decreases [ as sometimes voltage decreases]

Answer»

Can we conclude that overloading can be of 2 types:-●one in which current in circuit increases [ short circuit]

And ● and another in which current in circuit decreases [ as sometimes voltage decreases]

Discussion

16284.	Explain why it is easier to stop a tennis ball in comparison to a cricket ball moving with the same speed?
Answer» Explain why it is easier to stop a tennis ball in comparison to a cricket ball moving with the same speed?

Discussion

16285.	An object is placed at 25 cm from a convex mirror. Its image is formed 15 cm from the mirror. Find the focal length of the mirror.
Answer» An object is placed at 25 cm from a convex mirror. Its image is formed 15 cm from the mirror. Find the focal length of the mirror.

Discussion

16286.	What is the name of : (a) the curved, transparent front surface of the eye ? (b) the light-sensitive layer in the eye ?
Answer» What is the name of : (a) the curved, transparent front surface of the eye ? (b) the light-sensitive layer in the eye ?

Discussion

16287.	State one way to reduce the moment of a given force about a given axis of rotation.
Answer» State one way to reduce the moment of a given force about a given axis of rotation.

Discussion

16288.	Three different arrangements of media are given through which light rays are being passed. If total internal reflection does not happen at any interface, then in which of the following will the emergent ray be parallel to the incident ray?
Answer» Three different arrangements of media are given through which light rays are being passed. If total internal reflection does not happen at any interface, then in which of the following will the emergent ray be parallel to the incident ray?

Discussion

16289.	A spectral line of wave length 5000 A.U in the light coming from a distant star is observed to be shifted to 5004 A.U. The component of the recessional velocity of the star along the line of sight is :
Answer» A spectral line of wave length 5000 A.U in the light coming from a distant star is observed to be shifted to 5004 A.U. The component of the recessional velocity of the star along the line of sight is :

Discussion

16290.	List some of the achievements of Hubble Space Telescope.
Answer» List some of the achievements of Hubble Space Telescope.

Discussion

16291.	The blue colour of the sky is due to the fact that:
Answer» The blue colour of the sky is due to the fact that:

Discussion

16292.	The force required to open a nut using a spanner of length 90 cm is 50 N. Calculate the force required if the spanner is 50 cm long.
Answer» The force required to open a nut using a spanner of length 90 cm is 50 N. Calculate the force required if the spanner is 50 cm long.

Discussion

16293.	A roller of radius 1 m is on horizontal floor in contact with the edge of a step of height 20 cm. A horizontal force 2940 N is applied on the roller passing through its center by which the roller is just ready to turn on to the step. The mass of the roller is
Answer» A roller of radius 1 m is on horizontal floor in contact with the edge of a step of height 20 cm. A horizontal force 2940 N is applied on the roller passing through its center by which the roller is just ready to turn on to the step. The mass of the roller is

Discussion

16294.	1g of water at 0c has 336J more heat than ice at 0c.true/false? explain?
Answer» 1g of water at 0c has 336J more heat than ice at 0c.true/false? explain?

Discussion

16295.	When a cell is not connected to a conductor the electrons move randomly then why do we say that the net flow of electrons is zero as written in my textbook.
Answer» When a cell is not connected to a conductor the electrons move randomly then why do we say that the net flow of electrons is zero as written in my textbook.

Discussion

16296.	A beam of light enters from air to glass. The property of the light that does not change with a change in the medium is
Answer» A beam of light enters from air to glass. The property of the light that does not change with a change in the medium is

Discussion

16297.	How is the power of an lens related to its focal length ?
Answer» How is the power of an lens related to its focal length ?

Discussion

16298.	A car bulb connected to a 12 volt battery draws 2 A current when glowing. What is the resistance of the filament of the bulb? Will the resistance be more, same or less when the blb is not glowing?
Answer» A car bulb connected to a 12 volt battery draws 2 A current when glowing. What is the resistance of the filament of the bulb? Will the resistance be more, same or less when the blb is not glowing?

Discussion

16299.	The government of Texas declared the forest in the middle of the city as a national park thereby restricting the industries from felling trees but allowed local people to use the resources of the forests.On what factors did the government restrict the exploitation of forest by industries but not by local people?
Answer» The government of Texas declared the forest in the middle of the city as a national park thereby restricting the industries from felling trees but allowed local people to use the resources of the forests.On what factors did the government restrict the exploitation of forest by industries but not by local people?

Discussion

16300.	A truck driving along a highway road has a lot of momentum. If it moves at the same speed but has twice as much mass, its momentum is __.
Answer» A truck driving along a highway road has a lot of momentum. If it moves at the same speed but has twice as much mass, its momentum is __.

Discussion

Explore topic-wise InterviewSolutions in .

What is the cause of presbiopic defect?

How will you connect three resistors of resistance 2 Ω, 3 Ω and 6 Ω to obtain a total resistance of : (a) 4 Ω and (b) 1 Ω?

Draw a ray diagram to show how a converging lens is used as a magnifying glass to observe a small object. Mark on your diagram the foci of the lens and the position of the eye.

Question 5 (b) What is (b) the lowest total resistance that can be secured by combinations of four coils of resistance 4Ω,8Ω,12Ω and 24Ω?

How is the volume of water affected when it boils at 100oC ?

A doctor has prescribed a corrective lens of power +1.5 D to one of his patients. The focal length and the nature of the lens is

What do the following symbols mean in circuit diagrams? (i) (ii)

A diverging lens has a focal length of 3 cm. Calculate the power.

The direction of current in the coil at one end of an electromagnet is clockwise. This end of the electromagnet will be : (a) north pole (b) east pole (c) south pole (d) west pole

State the factor that determines (i) the pitch of a note, (ii) the loudness of the sound heard, and (iii) the quality of the note.

A particle covers a distance of 10 km in just 2 minutes. What is the speed at which the particle was traveling?

Number of electrons in a charge of 16 C is

Can you make me understand the concept of refraction of light along with an example and a question?

Please explain me the use of rheostat and the types of rheostat.

A wave source produces 20 crests and 20 troughs in 0.2 sec. Find the frequency of the wave.

Mention the decade during which the Tava Dam was built? __

A batsman hits 2 balls of different masses 0.5 kg and 1 kg out of the stadium. The velocity with which these balls travel is the same. What would be the ratio of their kinetic energies?

Why are real images always inverted and virtual images always erect?

Why different electrical appliances in a domestic circuit are connected in parallel?

When a plane mirror is rotated through an angle θ then the reflected ray turns through the angle 2θ then the size of the image

The meaning of the following statement is: The specific heat capacity of copper is 0.4 J g-1 oC-1.

The average internal kinetic energy of molecules of a substance is a measure of _______ of that substance.

The reisistivity of a certain material is 0.6Ω m. The material is most llikely to be: (a) an insulator (b) a superconductor (c) a conductor (d) a semiconductor

The lowest temperature for a substance to be in a gaseous state is

By adding some amount of ice, the temperature of 500 g of water at 50∘C, is lowered to 0∘C. If the specific heat capacity of water is 4.2 J g−1 K−1 and specific latent heat of ice is 336 J g−1, then find the mass of ice added to it.

An electrical appliance of R Ω resistance draws a current ‘I’ for time ‘t’. It is connected across a battery which offers a potential difference V. The energy consumed by the appliance is given by:

Disadvantages of geothermal energy and thermal energy.

Why thick mirrors produce a number of images ?

Why dispersion of white light takes place only in a prism and not in glass slab?

The electrical resistivity of four materials A ,B, C and D are given as A=110×10-8 ohm metre B=1×1010 ohm metre C=10×10-8 ohm metre D=2.3×103 ohm metre which material is 1) good material 2) resistor 3) insulator 4) semi-conductor Give reasons for your answer.

Can we conclude that overloading can be of 2 types:-●one in which current in circuit increases [ short circuit] And ● and another in which current in circuit decreases [ as sometimes voltage decreases]

Explain why it is easier to stop a tennis ball in comparison to a cricket ball moving with the same speed?

An object is placed at 25 cm from a convex mirror. Its image is formed 15 cm from the mirror. Find the focal length of the mirror.

What is the name of : (a) the curved, transparent front surface of the eye ? (b) the light-sensitive layer in the eye ?

State one way to reduce the moment of a given force about a given axis of rotation.

Three different arrangements of media are given through which light rays are being passed. If total internal reflection does not happen at any interface, then in which of the following will the emergent ray be parallel to the incident ray?

A spectral line of wave length 5000 A.U in the light coming from a distant star is observed to be shifted to 5004 A.U. The component of the recessional velocity of the star along the line of sight is :

List some of the achievements of Hubble Space Telescope.

The blue colour of the sky is due to the fact that:

The force required to open a nut using a spanner of length 90 cm is 50 N. Calculate the force required if the spanner is 50 cm long.

A roller of radius 1 m is on horizontal floor in contact with the edge of a step of height 20 cm. A horizontal force 2940 N is applied on the roller passing through its center by which the roller is just ready to turn on to the step. The mass of the roller is

1g of water at 0c has 336J more heat than ice at 0c.true/false? explain?

When a cell is not connected to a conductor the electrons move randomly then why do we say that the net flow of electrons is zero as written in my textbook.

A beam of light enters from air to glass. The property of the light that does not change with a change in the medium is

How is the power of an lens related to its focal length ?

A car bulb connected to a 12 volt battery draws 2 A current when glowing. What is the resistance of the filament of the bulb? Will the resistance be more, same or less when the blb is not glowing?

A truck driving along a highway road has a lot of momentum. If it moves at the same speed but has twice as much mass, its momentum is __.