6277 + Interview Questions in Physics Page 14 InterviewSolution

651.	Identify plano-concave lens amongst the following?
Answer» Identify plano-concave lens amongst the following?

651.

Identify plano-concave lens amongst the following?

Answer»

Identify plano-concave lens amongst the following?

652.	Which of the following graphs shows a bus moving with non-constant speed?
Answer» Which of the following graphs shows a bus moving with non-constant speed?

Discussion

653.	90.The displacement of a particle is given by y=a+bt+ct2+dt4. The initial velocity and acceleration are respectively
Answer» 90.The displacement of a particle is given by y=a+bt+ct2+dt4. The initial velocity and acceleration are respectively

Discussion

654.	What is the hotness of a body?
Answer» What is the hotness of a body?

Discussion

655.	Shishir was playing with a spring. He was compressing and releasing it. Suddenly he noticed that a ball, when kept on a compressed spring, attains certain height after it is released. In which of the following heights attained by the ball, energy spent by Shishir is maximum?
Answer» Shishir was playing with a spring. He was compressing and releasing it. Suddenly he noticed that a ball, when kept on a compressed spring, attains certain height after it is released. In which of the following heights attained by the ball, energy spent by Shishir is maximum?

Discussion

656.

Suppose that we have a vernier callipers which does not expand or contract on heating. Such a device is very useful in engineering applications where the dimensions are to be found at different temperatures. One such vernier callipers is used to measure the diameter of a rod at different temperatures as shown in table below. What will be the vernier scale reading (division coinciding) at a temperature of 50∘C.Given that 10 vernier scale divisions coincide with 9 main scale divisions and 1 main scale division is equal to 1 mm. Temperature T in ∘C 0 20 Main scale reading 2.4 cm 2.4 cm Vernier scale reading 4th division coinciding 8th division coinciding

Answer» Suppose that we have a vernier callipers which does not expand or contract on heating. Such a device is very useful in engineering applications where the dimensions are to be found at different temperatures. One such vernier callipers is used to measure the diameter of a rod at different temperatures as shown in table below. What will be the vernier scale reading (division coinciding) at a temperature of

50^{\circ} C

.

Given that

10

vernier scale divisions coincide with

9

main scale divisions and

1

main scale division is equal to

1 mm

.

Temperature T in $^{\circ} C$	0	20
Main scale reading	$2.4 cm$	$2.4 cm$
Vernier scale reading	$4^{t h}$ division coinciding	$8^{t h}$ division coinciding

Discussion

657.	1) We are not able to see our face in a cardboard but ,can see in plane mirror why? 2) A person uses a concave mirror while applying make-up on his/her face.
Answer» 1) We are not able to see our face in a cardboard but ,can see in plane mirror why? 2) A person uses a concave mirror while applying make-up on his/her face.

657.

1) We are not able to see our face in a cardboard but ,can see in plane mirror why? 2) A person uses a concave mirror while applying make-up on his/her face.

Answer»

1) We are not able to see our face in a cardboard but ,can see in plane mirror why?

2) A person uses a concave mirror while applying make-up on his/her face.

Discussion

658.	37.What would be the formula for distance travelled in nth seconds?
Answer» 37.What would be the formula for distance travelled in nth seconds?

Discussion

659.	a metallic tape gives correct value at 25 degree celsius.a piece of wood is being measured by this tape at10 degree celsius.the reading is 30cm on the tape,real length of wooden piece must be 1.=30 cm 2.30cm
Answer» a metallic tape gives correct value at 25 degree celsius.a piece of wood is being measured by this tape at10 degree celsius.the reading is 30cm on the tape,real length of wooden piece must be 1.=30 cm 2.<30 cm 3.>30cm

Discussion

660.	nta short bar magnet placedon table along north south line.its north pole is directed towards geographic north then location of neutral point isn nta.northn ntb.eastn ntc.westn ntd.southn
Answer» nta short bar magnet placedon table along north south line.its north pole is directed towards geographic north then location of neutral point isn nta.northn ntb.eastn ntc.westn ntd.southn

Discussion

661.	A wooden spoon is dipped in a cup of ice cream. Its other end(a) becomes cold by the process of conduction.(b) becomes cold by the process of convection.(c) becomes cold by the process of radiation.(d) does not become cold.
Answer» A wooden spoon is dipped in a cup of ice cream. Its other end (a) becomes cold by the process of conduction. (b) becomes cold by the process of convection. (c) becomes cold by the process of radiation. (d) does not become cold.

661.

A wooden spoon is dipped in a cup of ice cream. Its other end(a) becomes cold by the process of conduction.(b) becomes cold by the process of convection.(c) becomes cold by the process of radiation.(d) does not become cold.

Answer»

A wooden spoon is dipped in a cup of ice cream. Its other end

(a) becomes cold by the process of conduction.

(b) becomes cold by the process of convection.

(c) becomes cold by the process of radiation.

(d) does not become cold.

Discussion

662.	How do moon changes the phases?
Answer» How do moon changes the phases?

Discussion

663.	Which of the following is area of a circle? (a) 154 m (b) 154 sq. m (c) 154 cm
Answer» Which of the following is area of a circle? (a) 154 m (b) 154 sq. m (c) 154 cm

663.

Which of the following is area of a circle? (a) 154 m (b) 154 sq. m (c) 154 cm

Answer»

Which of the following is area of a circle?

(a) 154 m

(b) 154 sq. m

(c) 154 cm

Discussion

664.	Working of an electromagnet is based on ___.
Answer» Working of an electromagnet is based on ___.

Discussion

665.	A boy moves 400 m towards North, 300 m towards West and again 400 m towards South. Calculate the displacement of the boy from the initial position.
Answer» A boy moves 400 m towards North, 300 m towards West and again 400 m towards South. Calculate the displacement of the boy from the initial position.

Discussion

666.	9. In a circuit shown here, E1=E2=E3=2V and R1=R2=4ohms . The current between points A and B through battery E2 is ?
Answer» 9. In a circuit shown here, E1=E2=E3=2V and R1=R2=4ohms . The current between points A and B through battery E2 is ?

Discussion

667.	How winds affect the weather give examples
Answer» How winds affect the weather give examples

Discussion

668.	Which of the following(s) can be used for navigation?
Answer» Which of the following(s) can be used for navigation?

Discussion

669.	What do you mean by petroleum?
Answer» What do you mean by petroleum?

Discussion

670.	Usually, umbrellas are Black and black colour absorbs heat.Then why do we use black umbrellas to get protected from the sun?
Answer» Usually, umbrellas are Black and black colour absorbs heat.Then why do we use black umbrellas to get protected from the sun?

Discussion

671.	You can make a copper wire but not a coal wire. It is because:
Answer» You can make a copper wire but not a coal wire. It is because:

Discussion

672.	What is difference between motion and relative motion
Answer» What is difference between motion and relative motion

Discussion

673.	98.In an electrochemical cell , what is the flow of electrons in internal circuit?
Answer» 98.In an electrochemical cell , what is the flow of electrons in internal circuit?

Discussion

674.	(a) Work is said to be done by a force only when _________ (b) Work done = Force × _________ (c) The energy of a body is its capacity to do ______ (d) The S.I. unit of energy is ______ (e) The potential energy of a body is due to its ______ and kinetic energy of body is due to its ______ (f) Gravitational potential energy U = mass × force of gravity on unit mass × _________ (g) Kinetic energy = 12× mass ×_________ (h) Power P = ______ / time taken. (i) The S. I. unit of power is ______ (j) 1 H.P. = ______ W
Answer» (a) Work is said to be done by a force only when _________ (b) Work done = Force $\times$ _________ (c) The energy of a body is its capacity to do ______ (d) The S.I. unit of energy is ______ (e) The potential energy of a body is due to its ______ and kinetic energy of body is due to its ______ (f) Gravitational potential energy U = mass $\times$ force of gravity on unit mass $\times$ _________ (g) Kinetic energy = $\frac{1}{2} \times m a s s \times$ _________ (h) Power P = ______ / time taken. (i) The S. I. unit of power is ______ (j) 1 H.P. = ______ W

674.

(a) Work is said to be done by a force only when _____ (b) Work done = Force × _ (c) The energy of a body is its capacity to do (d) The S.I. unit of energy is (e) The potential energy of a body is due to its and kinetic energy of body is due to its (f) Gravitational potential energy U = mass × force of gravity on unit mass × _ (g) Kinetic energy = 12× mass ×_ (h) Power P = / time taken. (i) The S. I. unit of power is (j) 1 H.P. = __ W

Answer»

(a) Work is said to be done by a force only when _________

(b) Work done = Force $\times$ _________

(c) The energy of a body is its capacity to do ______

(d) The S.I. unit of energy is ______

(e) The potential energy of a body is due to its ______ and kinetic energy of body is due to its ______

(f) Gravitational potential energy U = mass $\times$ force of gravity on unit mass $\times$ _________

(g) Kinetic energy = $\frac{1}{2} \times m a s s \times$ _________

(h) Power P = ______ / time taken.

(i) The S. I. unit of power is ______

(j) 1 H.P. = ______ W

Discussion

675.	What Is Point of Incidence?
Answer» What Is Point of Incidence?

Discussion

676.	Explain the amplitude of a sound wave with the help of a diagram.
Answer» Explain the amplitude of a sound wave with the help of a diagram.

Discussion

677.	If the total charge on a pair of objects that have been rubbed together is zero ?Please explain
Answer» If the total charge on a pair of objects that have been rubbed together is zero ?Please explain

Discussion

678.	In a dry cell (battery), which of the following are used as electrolytes?
Answer» In a dry cell (battery), which of the following are used as electrolytes?

Discussion

679.	23.125 small drops of the same size are charged to V volt each.If they coalesce to form a single large drop, then its potential will be
Answer» 23.125 small drops of the same size are charged to V volt each.If they coalesce to form a single large drop, then its potential will be

Discussion

680.	Which appliance does not use electromagnet Washing Machines, electric heater,electric bell, grinder
Answer» Which appliance does not use electromagnet Washing Machines, electric heater,electric bell, grinder

680.

Which appliance does not use electromagnet Washing Machines, electric heater,electric bell, grinder

Answer»

Which appliance does not use electromagnet

Washing Machines, electric heater,electric bell, grinder

Discussion

681.	State 5 good and bad conductors of electricity. What metal is usully used in household wiring.
Answer» State 5 good and bad conductors of electricity. What metal is usully used in household wiring.

Discussion

682.	Nishigandha kept a vessel containing all the ingredients for making tea in a solar cooker. Shivani kept a similar vessel on a stove. Whose tea will be ready first and why?
Answer» Nishigandha kept a vessel containing all the ingredients for making tea in a solar cooker. Shivani kept a similar vessel on a stove. Whose tea will be ready first and why?

Discussion

683.	The displacement of a particle given as a function of time t s = 5t2 + 9t The ins†an†an eous acceleration of object at t = 0
Answer» The displacement of a particle given as a function of time t s = 5t2 + 9t The ins†an†an eous acceleration of object at t = 0

Discussion

684.	IS THE Time of ascend and descend are same thing if not what is the relationship between them
Answer» IS THE Time of ascend and descend are same thing if not what is the relationship between them

Discussion

685.	There is a square plot with side length equal to 13 m. A farmer wanted to grow grass on half his field and plough the remaining land. Find the area of land used to grow the grass.
Answer» There is a square plot with side length equal to 13 m. A farmer wanted to grow grass on half his field and plough the remaining land. Find the area of land used to grow the grass.

Discussion

686.	A plane mirror of length 10 cm is present near a wallin situation as shown in figure. Then the length ofspot formed on the wall isS source of lightwalld10 cm(2) 5 cm(1) 10 cm(4) 15 cmK3) 20 cm
Answer» A plane mirror of length 10 cm is present near a wallin situation as shown in figure. Then the length ofspot formed on the wall isS source of lightwalld10 cm(2) 5 cm(1) 10 cm(4) 15 cmK3) 20 cm

Discussion

687.	If a point charge is at a distance d from the origin on x axis , two charges of equal magnitude are kept on Y axis at (0,+r) and (0,-r) ,then prove when will the body show :(a) periodic motion(b) oscillation
Answer» If a point charge is at a distance d from the origin on x axis , two charges of equal magnitude are kept on Y axis at (0,+r) and (0,-r) ,then prove when will the body show : (a) periodic motion (b) oscillation

Discussion

688.	A body weighs 72 N on the surface of the Earth. What will be the force of gravity acting on the body at a height equal to half the radius of the Earth above the Earth's surface?
Answer» A body weighs $72 N$ on the surface of the Earth. What will be the force of gravity acting on the body at a height equal to half the radius of the Earth above the Earth's surface?

Discussion

689.	6. WHAT IS MTH POWER THEOREM
Answer» 6. WHAT IS MTH POWER THEOREM

Discussion

690.	Which of the following represents correct symbol for an electric bulb?
Answer» Which of the following represents correct symbol for an electric bulb?

Discussion

691.	kE of a body is incresed by 44% .what is the percent increase in momentu
Answer» kE of a body is incresed by 44% .what is the percent increase in momentu

Discussion

692.	Two particles each of mass M are initially at rest and infinitely separated from each other due to mutual interaction they move towards each other if kinetic energy of one particle with respect to another when separation between them is d is equal to kg m square upon De
Answer» Two particles each of mass M are initially at rest and infinitely separated from each other due to mutual interaction they move towards each other if kinetic energy of one particle with respect to another when separation between them is d is equal to kg m square upon De

Discussion

693.	If there are 10 minor divisions between two major divisions, one major division representing 1℃, one minor division will be equal to
Answer» If there are $10$ minor divisions between two major divisions, one major division representing $1$ ℃, one minor division will be equal to

Discussion

694.	A boy is standing in front of a plane mirror at a distance of 3 m from it. Then the distance between the boy and his image is:
Answer» A boy is standing in front of a plane mirror at a distance of 3 m from it. Then the distance between the boy and his image is:

Discussion

695.	Does friction depends upon the area of contact . If it depends then explain how? If not then why?
Answer» Does friction depends upon the area of contact . If it depends then explain how? If not then why?

Discussion

696.	Why work done by isobaric process is minimum during compression ?
Answer» Why work done by isobaric process is minimum during compression ?

Discussion

697.	21. three identical square plates rotate about the axis shown in the figure in such a way that the Kinetic energies are equal each of the rotation Axis passes through the centre of the square then the ratio of angular speeds
Answer» 21. three identical square plates rotate about the axis shown in the figure in such a way that the Kinetic energies are equal each of the rotation Axis passes through the centre of the square then the ratio of angular speeds

Discussion

698.	(4) -1 Af the radius of cross section of the conductor is increased by 0.1% keeping volume constachange in the resistance of the conductor is2nt, then percentage(3)-0.3%(4)-0. 4%
Answer» (4) -1 Af the radius of cross section of the conductor is increased by 0.1% keeping volume constachange in the resistance of the conductor is2nt, then percentage(3)-0.3%(4)-0. 4%

Discussion

699.	What is a group of atoms carrying some charge called? __
Answer» What is a group of atoms carrying some charge called? __

Discussion

700.	A thin semicircular conducting ring of radius r with its plane vertical and perpendicular to magnetic meridian is falling in earth's magnetic field. At an instantaneous position, the speed of the ring is v. The potential difference developed across the ring is? And which side is at higher at higher potential?(Assume Bh and Bv to be the horizontal and vertical components of the earth's magnetic field)
Answer» A thin semicircular conducting ring of radius r with its plane vertical and perpendicular to magnetic meridian is falling in earth's magnetic field. At an instantaneous position, the speed of the ring is v. The potential difference developed across the ring is? And which side is at higher at higher potential?(Assume Bh and Bv to be the horizontal and vertical components of the earth's magnetic field)

Discussion

Explore topic-wise InterviewSolutions in .

Identify plano-concave lens amongst the following?

Which of the following graphs shows a bus moving with non-constant speed?

90.The displacement of a particle is given by y=a+bt+ct2+dt4. The initial velocity and acceleration are respectively

What is the hotness of a body?

Shishir was playing with a spring. He was compressing and releasing it. Suddenly he noticed that a ball, when kept on a compressed spring, attains certain height after it is released. In which of the following heights attained by the ball, energy spent by Shishir is maximum?

1) We are not able to see our face in a cardboard but ,can see in plane mirror why? 2) A person uses a concave mirror while applying make-up on his/her face.

37.What would be the formula for distance travelled in nth seconds?

a metallic tape gives correct value at 25 degree celsius.a piece of wood is being measured by this tape at10 degree celsius.the reading is 30cm on the tape,real length of wooden piece must be 1.=30 cm 2.30cm

nta short bar magnet placedon table along north south line.its north pole is directed towards geographic north then location of neutral point isn nta.northn ntb.eastn ntc.westn ntd.southn

A wooden spoon is dipped in a cup of ice cream. Its other end(a) becomes cold by the process of conduction.(b) becomes cold by the process of convection.(c) becomes cold by the process of radiation.(d) does not become cold.

How do moon changes the phases?

Which of the following is area of a circle? (a) 154 m (b) 154 sq. m (c) 154 cm

Working of an electromagnet is based on ___.

A boy moves 400 m towards North, 300 m towards West and again 400 m towards South. Calculate the displacement of the boy from the initial position.

9. In a circuit shown here, E1=E2=E3=2V and R1=R2=4ohms . The current between points A and B through battery E2 is ?

How winds affect the weather give examples

Which of the following(s) can be used for navigation?

What do you mean by petroleum?

Usually, umbrellas are Black and black colour absorbs heat.Then why do we use black umbrellas to get protected from the sun?

You can make a copper wire but not a coal wire. It is because:

What is difference between motion and relative motion

98.In an electrochemical cell , what is the flow of electrons in internal circuit?

What Is Point of Incidence?

Explain the amplitude of a sound wave with the help of a diagram.

If the total charge on a pair of objects that have been rubbed together is zero ?Please explain

In a dry cell (battery), which of the following are used as electrolytes?

23.125 small drops of the same size are charged to V volt each.If they coalesce to form a single large drop, then its potential will be

Which appliance does not use electromagnet Washing Machines, electric heater,electric bell, grinder

State 5 good and bad conductors of electricity. What metal is usully used in household wiring.

Nishigandha kept a vessel containing all the ingredients for making tea in a solar cooker. Shivani kept a similar vessel on a stove. Whose tea will be ready first and why?

The displacement of a particle given as a function of time t s = 5t2 + 9t The ins†an†an eous acceleration of object at t = 0

IS THE Time of ascend and descend are same thing if not what is the relationship between them

There is a square plot with side length equal to 13 m. A farmer wanted to grow grass on half his field and plough the remaining land. Find the area of land used to grow the grass.

A plane mirror of length 10 cm is present near a wallin situation as shown in figure. Then the length ofspot formed on the wall isS source of lightwalld10 cm(2) 5 cm(1) 10 cm(4) 15 cmK3) 20 cm

If a point charge is at a distance d from the origin on x axis , two charges of equal magnitude are kept on Y axis at (0,+r) and (0,-r) ,then prove when will the body show :(a) periodic motion(b) oscillation

A body weighs 72 N on the surface of the Earth. What will be the force of gravity acting on the body at a height equal to half the radius of the Earth above the Earth's surface?

6. WHAT IS MTH POWER THEOREM

Which of the following represents correct symbol for an electric bulb?

kE of a body is incresed by 44% .what is the percent increase in momentu

Two particles each of mass M are initially at rest and infinitely separated from each other due to mutual interaction they move towards each other if kinetic energy of one particle with respect to another when separation between them is d is equal to kg m square upon De

If there are 10 minor divisions between two major divisions, one major division representing 1℃, one minor division will be equal to

A boy is standing in front of a plane mirror at a distance of 3 m from it. Then the distance between the boy and his image is:

Does friction depends upon the area of contact . If it depends then explain how? If not then why?

Why work done by isobaric process is minimum during compression ?

21. three identical square plates rotate about the axis shown in the figure in such a way that the Kinetic energies are equal each of the rotation Axis passes through the centre of the square then the ratio of angular speeds

(4) -1 Af the radius of cross section of the conductor is increased by 0.1% keeping volume constachange in the resistance of the conductor is2nt, then percentage(3)-0.3%(4)-0. 4%

What is a group of atoms carrying some charge called? __