9478 + Interview Questions in Physics Page 72 InterviewSolution

3551.	In the circuit shown, the current thorugh the battery isDiaram
Answer» In the circuit shown, the current thorugh the battery is Diaram

Discussion

3552.	Does an electric cell contains electrons
Answer» Does an electric cell contains electrons

Discussion

3553.	Find the root of the following quadratic equation if they exist by the method of completing square2x^2+X+4
Answer» Find the root of the following quadratic equation if they exist by the method of completing square 2x^2+X+4

Discussion

3554.	A stamp placed under a thick glass block appears raised. Give reason.
Answer» A stamp placed under a thick glass block appears raised. Give reason.

Discussion

3555.	is there a difference between speed and velocity
Answer» is there a difference between speed and velocity

Discussion

3556.	The period of revolution of planet A around the sun is 8 times that of B. The distance of A from the sun is how many times greater than that of B from the sun?
Answer» The period of revolution of planet A around the sun is 8 times that of B. The distance of A from the sun is how many times greater than that of B from the sun?

Discussion

3557.	A flywheel is attached to an engine to keep its rotational speed between 100 rad/s and 110 rad/s. If the energy fluctuation in the flywheel between these two speeds is 1.05 kJ then the moment of inertia of the flywheel is kg.m2(round off to 2 decimal places).2
Answer» A flywheel is attached to an engine to keep its rotational speed between 100 rad/s and 110 rad/s. If the energy fluctuation in the flywheel between these two speeds is 1.05 kJ then the moment of inertia of the flywheel is kg. $m^{2}$ (round off to 2 decimal places). 2

Discussion

3558.	2500 kg m−3 = ___ g cm−3
Answer» $2500 k g m^{- 3} =$ ___ $g c m^{- 3}$

Discussion

3559.	Name two objects other than planets which are members of the solar system?
Answer» Name two objects other than planets which are members of the solar system?

Discussion

3560.	A positively charged body is brought in contact to an uncharged gold leaf electroscope, then:
Answer» A positively charged body is brought in contact to an uncharged gold leaf electroscope, then:

Discussion

3561.	The coefficient of friction between the floor and body B is 0.1 and between the bodies B and A is 0.2. A force F is applied on B as shown in figure. The maximum value of F such that both are move together is (mass of A and B are m and 2m respectively)
Answer» The coefficient of friction between the floor and body B is 0.1 and between the bodies B and A is 0.2. A force F is applied on B as shown in figure. The maximum value of F such that both are move together is (mass of A and B are m and 2m respectively)

Discussion

3562.	nn nt nttTWO IDENTICAL PARTICLES OF MASS M CARRYING A CHARGE Q EACH. INITIALLY ONE IS AT REST ON A SMOOTH HORIZONTAL PLANE AND THE OTHER IS PROJECTED ALONG THE PLANE DIRECTLY TOWARDS FIRST PARTICLE FROM A LARGE DISTANCE WITH SPEED V . THE CLOSEST DISTANCE OF APPROACH BE? nn ntn
Answer» nn nt nttTWO IDENTICAL PARTICLES OF MASS M CARRYING A CHARGE Q EACH. INITIALLY ONE IS AT REST ON A SMOOTH HORIZONTAL PLANE AND THE OTHER IS PROJECTED ALONG THE PLANE DIRECTLY TOWARDS FIRST PARTICLE FROM A LARGE DISTANCE WITH SPEED V . THE CLOSEST DISTANCE OF APPROACH BE? nn ntn

Discussion

3563.	If amplitude is increased to its 10% what will be the change in intensity of the sound?
Answer» If amplitude is increased to its 10% what will be the change in intensity of the sound?

Discussion

3564.	A cons†an t volume gas thermometer shows pressure reading of 50cm and 90cm of mercury at 0^{0 }and 100^0 respectevely.When the pressure reading is 60cm of mercury,the temperature is (1)25^0c (2)40^0c (3)15^0c 12.5^0c
Answer» A cons†an t volume gas thermometer shows pressure reading of 50cm and 90cm of mercury at 0^{0 }and 100^0 respectevely.When the pressure reading is 60cm of mercury,the temperature is (1)25^0c (2)40^0c (3)15^0c 12.5^0c

Discussion

3565.	Why does a falling star not cause any harm?
Answer» Why does a falling star not cause any harm?

Discussion

3566.	What are α-particles
Answer» What are α-particles

Discussion

3567.	If white ray falls on the system as shown in the given diagram, then how many colours will we see after all dispersions have happened?
Answer» If white ray falls on the system as shown in the given diagram, then how many colours will we see after all dispersions have happened?

3567.

If white ray falls on the system as shown in the given diagram, then how many colours will we see after all dispersions have happened?

Answer»

If white ray falls on the system as shown in the given diagram, then how many colours will we see after all dispersions have happened?

Discussion

3568.	The area of a rectangular piece of a board is 36 cm2. If its thickness is 4 cm, what is the volume of the board?
Answer» The area of a rectangular piece of a board is $36 c m^{2}$ . If its thickness is $4 c m$ , what is the volume of the board?

Discussion

3569.	Question 20A marble is allowed to roll down an inclined plane from a fixed height. At the foot of the inclined plane, it moves on a horizontal surface (a) covered with silk cloth (b) covered with a layer of sand and (c) covered with a glass sheet. On which surface will the marble move the shortest distance. Give reason for your answer.
Answer» Question 20 A marble is allowed to roll down an inclined plane from a fixed height. At the foot of the inclined plane, it moves on a horizontal surface (a) covered with silk cloth (b) covered with a layer of sand and (c) covered with a glass sheet. On which surface will the marble move the shortest distance. Give reason for your answer.

Discussion

3570.	List out the formulae in motion in a straight line
Answer» List out the formulae in motion in a straight line

Discussion

3571.	24.Assertion:acceleration of a moving body can change its direction without any change in direction in velocity. Reason:if the direction of change in velocityvector changes the direction of acceleration also changes.
Answer» 24.Assertion:acceleration of a moving body can change its direction without any change in direction in velocity. Reason:if the direction of change in velocityvector changes the direction of acceleration also changes.

Discussion

3572.	Properties of sound? sound as a wave?
Answer» Properties of sound? sound as a wave?

Discussion

3573.	If a positively charged rod is brought near two uncharged metal spheres 'A' and 'B ' clamped on insulated s†an ds and placed in contact with each other . Would the induced charges be equal in magnitude if sphere A is made of gold and has radius 200000 m and sphere B is made of silver and has a radius of 1m Why or why not
Answer» If a positively charged rod is brought near two uncharged metal spheres 'A' and 'B ' clamped on insulated s†an ds and placed in contact with each other . Would the induced charges be equal in magnitude if sphere A is made of gold and has radius 200000 m and sphere B is made of silver and has a radius of 1m Why or why not

Discussion

3574.	Describe Hope’s experiment to demonstrate that water has maximum density at 4°C:
Answer» Describe Hope’s experiment to demonstrate that water has maximum density at 4°C:

Discussion

3575.	Which one of the following places is unlikely to be affected by a cyclone?
Answer» Which one of the following places is unlikely to be affected by a cyclone?

Discussion

3576.	81.If 500 sound waves are produced in 1 minute, what is time taken by a vibrating particle to move from its mean position to the immediate rarefaction?
Answer» 81.If 500 sound waves are produced in 1 minute, what is time taken by a vibrating particle to move from its mean position to the immediate rarefaction?

Discussion

3577.	What are the safety measures during a lightning strike?
Answer» What are the safety measures during a lightning strike?

Discussion

3578.	Among five people --- P, Q, R, S and T sitting around a circular table facing the centre, who is sitting second to the left of S? I. R is second to the left of P. Q and S are immediate neighbours of each other. II. S is to the immediate left of Q. T is not an immediate neighbours of S and Q.
Answer» Among five people --- P, Q, R, S and T sitting around a circular table facing the centre, who is sitting second to the left of S? I. R is second to the left of P. Q and S are immediate neighbours of each other. II. S is to the immediate left of Q. T is not an immediate neighbours of S and Q.

Discussion

3579.	an ideal gas is kept in a 5L cylinder at a pressure of 15 atm. in 30 minutes the gas is allowed to enter slowly into an evacuvated vessel of 500L capacity. totl work done i
Answer» an ideal gas is kept in a 5L cylinder at a pressure of 15 atm. in 30 minutes the gas is allowed to enter slowly into an evacuvated vessel of 500L capacity. totl work done i

Discussion

3580.	Supposeyour writing desk is tilted a little. A book kept on it startssliding down. Show the direction of frictional force acting on it.
Answer» Suppose your writing desk is tilted a little. A book kept on it starts sliding down. Show the direction of frictional force acting on it.

Discussion

3581.	What is meant by 'reflected ray'?
Answer» What is meant by 'reflected ray'?

Discussion

3582.	Identify the given images and give the most appropriate title.
Answer» Identify the given images and give the most appropriate title.

Discussion

3583.	A magnetic flux through a stationary loop with a resistance R and time t varies during the time interval τ as ϕ=at(τ−t), where, a is a positive constant. Find the amount of heat generated in the loop during that time. (Neglect the inductance of the loop.)
Answer» A magnetic flux through a stationary loop with a resistance $R$ and time $t$ varies during the time interval $τ$ as $ϕ = a t (τ - t)$ , where, $a$ is a positive constant. Find the amount of heat generated in the loop during that time. (Neglect the inductance of the loop.)

Discussion

3584.	a research satellite of mass 200kg circles the earth in an orbit of average radius 3R/2 where R is the radius of the earth assuming the gravitational pull on a mass 1kg on earth's surface to be 10N the pull on the satellite will be
Answer» a research satellite of mass 200kg circles the earth in an orbit of average radius 3R/2 where R is the radius of the earth assuming the gravitational pull on a mass 1kg on earth's surface to be 10N the pull on the satellite will be

Discussion

3585.	The pitch of the sound depends on the:
Answer» The pitch of the sound depends on the:

Discussion

3586.	How is the loudness related to the amplitude of sound and in what units it is measured?[3 MARKS]
Answer» How is the loudness related to the amplitude of sound and in what units it is measured?[3 MARKS]

Discussion

3587.	For a moving charged body, what will be the effect on charge and mass
Answer» For a moving charged body, what will be the effect on charge and mass

Discussion

3588.	A beam of light propagating in medium A with index of refraction n (A)passes across an interface into medium B with index of refraction n(B). The angle of incidence is greater than the angle of refraction; v(A) and v(B) denotes the speed of light in A and B. Then which of the following is true
Answer» A beam of light propagating in medium A with index of refraction n (A)passes across an interface into medium B with index of refraction n(B). The angle of incidence is greater than the angle of refraction; v(A) and v(B) denotes the speed of light in A and B. Then which of the following is true

Discussion

3589.	Write about guidance system.
Answer» Write about guidance system.

Discussion

3590.	Which of the following are associated with lightning?
Answer» Which of the following are associated with lightning?

Discussion

3591.	Which of the following best describe solids?
Answer» Which of the following best describe solids?

Discussion

3592.	A disc of radius R is rolling without sliding on a horizontal surface such that the velocity of c.m. is v. what will be the instantenious velocity of point P on the circumference which subtended 60 degree angle at the centre?
Answer» A disc of radius R is rolling without sliding on a horizontal surface such that the velocity of c.m. is v. what will be the instantenious velocity of point P on the circumference which subtended 60 degree angle at the centre?

Discussion

3593.	two point charge +10μ c and +20μ c reple each outher with a force of 100N. if a charge of -2μ c is added to each charge , then force between them will became n
Answer» two point charge +10μ c and +20μ c reple each outher with a force of 100N. if a charge of -2μ c is added to each charge , then force between them will became n

Discussion

3594.	What impact would decreasing irregularities on two surfaces rubbing each other have on the frictional force between them?
Answer» What impact would decreasing irregularities on two surfaces rubbing each other have on the frictional force between them?

Discussion

3595.	If a ray of light is incident at an angle of 60° to the normal, then the angle formed by the reflected ray with the normal is equal to:
Answer» If a ray of light is incident at an angle of 60° to the normal, then the angle formed by the reflected ray with the normal is equal to:

Discussion

3596.	The correct relation between the radius of curvature (R), distance of object from the mirror (u), and distance of image formed (v) from the mirror is
Answer» The correct relation between the radius of curvature ( $R$ ), distance of object from the mirror ( $u$ ), and distance of image formed ( $v$ ) from the mirror is

Discussion

3597.	22.figure shows a pully of mass m and radius r with the block's of masses m and m attached with light and unstretchable string. The angular acceleration of the pulley is (assume no slipping B/w the string and pulley, m=4Kg, m=6Kg, m=2Kg,r=10cm and g=10m/s) 1) 50/11rad/s 2) 100/11rad/s 3) 200/11rad/s
Answer» 22.figure shows a pully of mass m and radius r with the block's of masses m and m attached with light and unstretchable string. The angular acceleration of the pulley is (assume no slipping B/w the string and pulley, m=4Kg, m=6Kg, m=2Kg,r=10cm and g=10m/s) 1) 50/11rad/s 2) 100/11rad/s 3) 200/11rad/s

Discussion

3598.	Foot is used as a basic unit of measurement for measuring length in which of the following systems?
Answer» Foot is used as a basic unit of measurement for measuring length in which of the following systems?

Discussion

3599.	Why do aircrafts flying at high altitude must have pressurize cabins
Answer» Why do aircrafts flying at high altitude must have pressurize cabins

Discussion

3600.	How many plane mirror strips are there in a kaleidoscope? How are they arranged?
Answer» How many plane mirror strips are there in a kaleidoscope? How are they arranged?

Discussion

Explore topic-wise InterviewSolutions in .

In the circuit shown, the current thorugh the battery isDiaram

Does an electric cell contains electrons

Find the root of the following quadratic equation if they exist by the method of completing square2x^2+X+4

A stamp placed under a thick glass block appears raised. Give reason.

is there a difference between speed and velocity

The period of revolution of planet A around the sun is 8 times that of B. The distance of A from the sun is how many times greater than that of B from the sun?

A flywheel is attached to an engine to keep its rotational speed between 100 rad/s and 110 rad/s. If the energy fluctuation in the flywheel between these two speeds is 1.05 kJ then the moment of inertia of the flywheel is kg.m2(round off to 2 decimal places).2

2500 kg m−3 = ___ g cm−3

Name two objects other than planets which are members of the solar system?

A positively charged body is brought in contact to an uncharged gold leaf electroscope, then:

The coefficient of friction between the floor and body B is 0.1 and between the bodies B and A is 0.2. A force F is applied on B as shown in figure. The maximum value of F such that both are move together is (mass of A and B are m and 2m respectively)

nn nt nttTWO IDENTICAL PARTICLES OF MASS M CARRYING A CHARGE Q EACH. INITIALLY ONE IS AT REST ON A SMOOTH HORIZONTAL PLANE AND THE OTHER IS PROJECTED ALONG THE PLANE DIRECTLY TOWARDS FIRST PARTICLE FROM A LARGE DISTANCE WITH SPEED V . THE CLOSEST DISTANCE OF APPROACH BE? nn ntn

If amplitude is increased to its 10% what will be the change in intensity of the sound?

A cons†an t volume gas thermometer shows pressure reading of 50cm and 90cm of mercury at 0^{0 }and 100^0 respectevely.When the pressure reading is 60cm of mercury,the temperature is (1)25^0c (2)40^0c (3)15^0c 12.5^0c

Why does a falling star not cause any harm?

What are α-particles

If white ray falls on the system as shown in the given diagram, then how many colours will we see after all dispersions have happened?

The area of a rectangular piece of a board is 36 cm2. If its thickness is 4 cm, what is the volume of the board?

List out the formulae in motion in a straight line

24.Assertion:acceleration of a moving body can change its direction without any change in direction in velocity. Reason:if the direction of change in velocityvector changes the direction of acceleration also changes.

Properties of sound? sound as a wave?

Describe Hope’s experiment to demonstrate that water has maximum density at 4°C:

Which one of the following places is unlikely to be affected by a cyclone?

81.If 500 sound waves are produced in 1 minute, what is time taken by a vibrating particle to move from its mean position to the immediate rarefaction?

What are the safety measures during a lightning strike?

Among five people --- P, Q, R, S and T sitting around a circular table facing the centre, who is sitting second to the left of S? I. R is second to the left of P. Q and S are immediate neighbours of each other. II. S is to the immediate left of Q. T is not an immediate neighbours of S and Q.

an ideal gas is kept in a 5L cylinder at a pressure of 15 atm. in 30 minutes the gas is allowed to enter slowly into an evacuvated vessel of 500L capacity. totl work done i

Supposeyour writing desk is tilted a little. A book kept on it startssliding down. Show the direction of frictional force acting on it.

What is meant by 'reflected ray'?

Identify the given images and give the most appropriate title.

A magnetic flux through a stationary loop with a resistance R and time t varies during the time interval τ as ϕ=at(τ−t), where, a is a positive constant. Find the amount of heat generated in the loop during that time. (Neglect the inductance of the loop.)

a research satellite of mass 200kg circles the earth in an orbit of average radius 3R/2 where R is the radius of the earth assuming the gravitational pull on a mass 1kg on earth's surface to be 10N the pull on the satellite will be

The pitch of the sound depends on the:

How is the loudness related to the amplitude of sound and in what units it is measured?[3 MARKS]

For a moving charged body, what will be the effect on charge and mass

A beam of light propagating in medium A with index of refraction n (A)passes across an interface into medium B with index of refraction n(B). The angle of incidence is greater than the angle of refraction; v(A) and v(B) denotes the speed of light in A and B. Then which of the following is true

Write about guidance system.

Which of the following are associated with lightning?

Which of the following best describe solids?

A disc of radius R is rolling without sliding on a horizontal surface such that the velocity of c.m. is v. what will be the instantenious velocity of point P on the circumference which subtended 60 degree angle at the centre?

two point charge +10μ c and +20μ c reple each outher with a force of 100N. if a charge of -2μ c is added to each charge , then force between them will became n

What impact would decreasing irregularities on two surfaces rubbing each other have on the frictional force between them?

If a ray of light is incident at an angle of 60° to the normal, then the angle formed by the reflected ray with the normal is equal to:

The correct relation between the radius of curvature (R), distance of object from the mirror (u), and distance of image formed (v) from the mirror is

Foot is used as a basic unit of measurement for measuring length in which of the following systems?

Why do aircrafts flying at high altitude must have pressurize cabins

How many plane mirror strips are there in a kaleidoscope? How are they arranged?