6277 + Interview Questions in Physics Page 44 InterviewSolution

2151.	A metalic ring is attached with the wall of a room. When the north pole of a magnet is brought near to it the induced current in the induced current in the ring will be (a) first clock wise then anticlockwise (b) in clock wise direction (c) in anticlockwise direction (d) first clock wise then close wise
Answer» A metalic ring is attached with the wall of a room. When the north pole of a magnet is brought near to it the induced current in the induced current in the ring will be (a) first clock wise then anticlockwise (b) in clock wise direction (c) in anticlockwise direction (d) first clock wise then close wise

Discussion

2152.	When a thermometer is brought in contact with a hot body, the liquid inside it_________.
Answer» When a thermometer is brought in contact with a hot body, the liquid inside it_________.

Discussion

2153.	The sum of all electromagnetic forces between different particals of a system of charged particals is 0A) only if all the particals are negativelyChargedB) only if all the particals are positively chargedC) only if half is positive and other half is negativeD) irrespective of the signs of charges
Answer» The sum of all electromagnetic forces between different particals of a system of charged particals is 0 A) only if all the particals are negatively Charged B) only if all the particals are positively charged C) only if half is positive and other half is negative D) irrespective of the signs of charges

Discussion

2154.	45. A person 1.6m tall is standing at the centre between two walls three metre high. What is the minimum size of the plane mirror fixed on the wall in front of him if he is to see the full size of the wall behind him?
Answer» 45. A person 1.6m tall is standing at the centre between two walls three metre high. What is the minimum size of the plane mirror fixed on the wall in front of him if he is to see the full size of the wall behind him?

Discussion

2155.	The kinetic energy of a particle depends on the square of speed of the particle. If error in measurement of speed is 30%, the error in the measurement of kinetic energy will be?Is it 60% or 69%? How?
Answer» The kinetic energy of a particle depends on the square of speed of the particle. If error in measurement of speed is 30%, the error in the measurement of kinetic energy will be? Is it 60% or 69%? How?

Discussion

2156.	When a magnetic compass is brought near a current carrying wire then what happens?
Answer» When a magnetic compass is brought near a current carrying wire then what happens?

Discussion

2157.	Name a device that prevents loss (or gain) of energy by conduction, convection and radiation.
Answer» Name a device that prevents loss (or gain) of energy by conduction, convection and radiation.

Discussion

2158.	Question 13Lightning and thunder take place in the sky at the same time and at the same distance from us. Lightning is seen earlier and thunder is heard later. Can you explain?
Answer» Question 13 Lightning and thunder take place in the sky at the same time and at the same distance from us. Lightning is seen earlier and thunder is heard later. Can you explain?

Discussion

2159.	66. Length of a seconds hand in a clock is 10 cm.Find the displacement of its tip in 20 s(1) 103 cm(3) 20\surd3 cm(2) 10 cm(4) 5 cm
Answer» 66. Length of a seconds hand in a clock is 10 cm.Find the displacement of its tip in 20 s(1) 103 cm(3) 20\surd3 cm(2) 10 cm(4) 5 cm

Discussion

2160.	where are the poles of a sphere magnet
Answer» where are the poles of a sphere magnet

Discussion

2161.	Please answer me the question in 80 words. What precautions will you take while measuring temperature with a laboratory thermometer? What extra precautions will you take while measuring it with a clinical thermometer?
Answer» Please answer me the question in 80 words. What precautions will you take while measuring temperature with a laboratory thermometer? What extra precautions will you take while measuring it with a clinical thermometer?

Discussion

2162.	What is the minimum number of rays required to form the image of a point?
Answer» What is the minimum number of rays required to form the image of a point?

Discussion

2163.	Describe the construction, working and usefulness of a dry cell, with the help of a diagram.
Answer» Describe the construction, working and usefulness of a dry cell, with the help of a diagram.

Discussion

2164.	a charge q is placed at (1,2,1)and another charge -q is placed at (0,1,0) such that they form an electric dipole there exists a uniform electric field e=2i calculate the torue
Answer» a charge q is placed at (1,2,1)and another charge -q is placed at (0,1,0) such that they form an electric dipole there exists a uniform electric field e=2i calculate the torue

Discussion

2165.	What is a Thermister and what are its types?
Answer» What is a Thermister and what are its types?

Discussion

2166.	Define angle of incidence and glance angle of incidence ?
Answer» Define angle of incidence and glance angle of incidence ?

Discussion

2167.	Explain why a car on any city road is an example of a non-uniform motion.
Answer» Explain why a car on any city road is an example of a non-uniform motion.

Discussion

2168.	7.A particle moves along a straight line for 10 seconds with uniform acceleration, a= 2m/s² then for next 10 seconds moves with acceleration a= 4 m/s² the total displacement of particle would be
Answer» 7.A particle moves along a straight line for 10 seconds with uniform acceleration, a= 2m/s² then for next 10 seconds moves with acceleration a= 4 m/s² the total displacement of particle would be

Discussion

2169.	The hyperconjugative stabilities of tert-butyl cation and 2-butene, respectively, are due to (A)-> p(empty) and-> * electron delocalisations (B)->* and-> electron delocalisations (C)-> p(filled) and-> electron delocalisations (D) p(filled) ->* and-> * electron delocalisations
Answer» The hyperconjugative stabilities of tert-butyl cation and 2-butene, respectively, are due to (A)-> p(empty) and-> * electron delocalisations (B)->* and-> electron delocalisations (C)-> p(filled) and-> electron delocalisations (D) p(filled) ->* and-> * electron delocalisations

Discussion

2170.	Suppose you have two magnets whose ends are marked as South Pole and North Pole. You have to keep two magnets such that one magnet is upon other magnet and also their North Poles are on same side. How will these magnets behave?
Answer» Suppose you have two magnets whose ends are marked as South Pole and North Pole. You have to keep two magnets such that one magnet is upon other magnet and also their North Poles are on same side. How will these magnets behave?

Discussion

2171.	A parallel beam of monochromatic light of wavelength 600 nm falls normally on a slit of width 0.5 mm. The resulting diffraction pattern is observed on a screen placed of 50 cm from the slit. The linear separation between the first minimum and the first maximum on the same side of the central maximum is
Answer» A parallel beam of monochromatic light of wavelength $600 nm$ falls normally on a slit of width $0.5 mm$ . The resulting diffraction pattern is observed on a screen placed of $50 cm$ from the slit. The linear separation between the first minimum and the first maximum on the same side of the central maximum is

Discussion

2172.	A ball collides directly with another ball at rest and is brought to rest by the impact. If half of the initial kinetic energy is lost in the impact, then the coefficient of restitution is 1/4 1/2 3/4 1/1.414
Answer» A ball collides directly with another ball at rest and is brought to rest by the impact. If half of the initial kinetic energy is lost in the impact, then the coefficient of restitution is 1/4 1/2 3/4 1/1.414

Discussion

2173.	___ objects allow light, to pass through them partially.
Answer» ___ objects allow light, to pass through them partially.

Discussion

2174.	Two wires of the same material (Young’s modulus Y) and same length L but radii R and 2R respectively are joined end to end and a weight w is suspended from the combination as shown in the figure. The elastic potential energy in the system is
Answer» Two wires of the same material (Young’s modulus Y) and same length L but radii R and 2R respectively are joined end to end and a weight w is suspended from the combination as shown in the figure. The elastic potential energy in the system is

Discussion

2175.	Like charges ___ and unlike charges ___ each other.
Answer» Like charges ___ and unlike charges ___ each other.

Discussion

2176.	A boy riding on his bike is going towards west at a speed of 6 m/s. At a certain point, he produces a sound pulse of frequency 1005 Hz, that travels in air at a speed of 338 m/s. A second boy stands on the ground 60∘ south of west from him. Find the frequency of the pulse as received by the second boy.
Answer» A boy riding on his bike is going towards west at a speed of $6 m/s$ . At a certain point, he produces a sound pulse of frequency $1005 Hz$ , that travels in air at a speed of $338 m/s$ . A second boy stands on the ground $60^{\circ}$ south of west from him. Find the frequency of the pulse as received by the second boy.

Discussion

2177.	o is the point on the ground chosen as origin. A body first suffers a displacement of 10\sqrt2 m North East, next 10 m North and finally 10\sqrt2 m North West. How far is it from origin
Answer» o is the point on the ground chosen as origin. A body first suffers a displacement of 10\sqrt2 m North East, next 10 m North and finally 10\sqrt2 m North West. How far is it from origin

Discussion

2178.	Find the volume of a sphere whose radius is 0.63 m.[Assume π=227]
Answer» Find the volume of a sphere whose radius is 0.63 m. $[A s s u m e π = \frac{22}{7}]$

Discussion

2179.	Soft iron pieces are placed across the ends of bar magnets when stored. What are such pieces called?
Answer» Soft iron pieces are placed across the ends of bar magnets when stored. What are such pieces called?

Discussion

2180.	19.the bob of a pendulum at rest is given a sharp hit to impart a horizontal velocity of (10gl)1/2where l is length of pendulum. Find the speed of pendulum when its tangential acceleration is g
Answer» 19.the bob of a pendulum at rest is given a sharp hit to impart a horizontal velocity of (10gl)1/2where l is length of pendulum. Find the speed of pendulum when its tangential acceleration is g

Discussion

2181.	what is the sign convection of v" u and r used in the formula of refraction through curved surface
Answer» what is the sign convection of v" u and r used in the formula of refraction through curved surface

Discussion

2182.	Lightning is a/an ___ on a huge scale.Identify an appropriate option.
Answer» Lightning is a/an ___ on a huge scale. Identify an appropriate option.

2182.

Lightning is a/an ___ on a huge scale.Identify an appropriate option.

Answer»

Lightning is a/an ___ on a huge scale.

Identify an appropriate option.

Discussion

2183.	Identify the type of mirror used in these following figures.
Answer» Identify the type of mirror used in these following figures.

Discussion

2184.	Of2 hyberdysation
Answer» Of2 hyberdysation

Discussion

2185.	A equi convex lens (R1 = R2 = 10 cm) (μ = 1.5) having, focal length equal to focal length of concave mirror. The radius of cuvarture of concave mirror is Options: 10 cm 20 cm 40 cm 15 cm
Answer» A equi convex lens (R1 = R2 = 10 cm) (μ = 1.5) having, focal length equal to focal length of concave mirror. The radius of cuvarture of concave mirror is Options: 10 cm 20 cm 40 cm 15 cm

Discussion

2186.	16. A ring of mass 'm' and radius 'R' rolls down arough inclined plane of angle 'e'. Friction force onthe ring ismg sin(1)mg sin(2)35mg sin e2(3)(4) mg sine
Answer» 16. A ring of mass 'm' and radius 'R' rolls down a rough inclined plane of angle 'e'. Friction force on the ring is mg sin (1) mg sin (2) 3 5 mg sin e 2 (3) (4) mg sine

Discussion

2187.	On the earth surface a simple pendulum has time period T. It is taken to another planet having acceleration due to gravity half and density nine times that of earth . The time period of the pendulum on the new planet will be
Answer» On the earth surface a simple pendulum has time period T. It is taken to another planet having acceleration due to gravity half and density nine times that of earth . The time period of the pendulum on the new planet will be

Discussion

2188.	36. Is density intensive or extensive property?
Answer» 36. Is density intensive or extensive property?

Discussion

2189.	Why are gold leaves used to make an electroscope more sensitive?
Answer» Why are gold leaves used to make an electroscope more sensitive?

Discussion

2190.	An iron ball at temperature of 45∘C is dropped in a glass of water. What is the temperature of water, if there is no heat flow between water and the iron ball?
Answer» An iron ball at temperature of $45^{\circ} C$ is dropped in a glass of water. What is the temperature of water, if there is no heat flow between water and the iron ball?

2190.

An iron ball at temperature of 45∘C is dropped in a glass of water. What is the temperature of water, if there is no heat flow between water and the iron ball?

Answer»

An iron ball at temperature of $45^{\circ} C$ is dropped in a glass of water. What is the temperature of water, if there is no heat flow between water and the iron ball?

Discussion

2191.	Calculate the buoyant force (in N) acting on a 250 g rubik's cube of side length 8 cm, if only half of it is submerged in kerosene. The rubik's cube is hanging by a thread. Density of kerosene is 0.8 g cm−3. Take g=10 m s−2.2.048
Answer» Calculate the buoyant force (in $N$ ) acting on a $250 g$ rubik's cube of side length $8 cm$ , if only half of it is submerged in kerosene. The rubik's cube is hanging by a thread. Density of kerosene is $0.8 g {cm}^{- 3}$ . Take $g = 10 m s^{- 2}$ . 2.048

Discussion

2192.	Which state of matter has the largest space between its particles.
Answer» Which state of matter has the largest space between its particles.

Discussion

2193.	Which of the following position-time graphs represents uniform motion?
Answer» Which of the following position-time graphs represents uniform motion?

Discussion

2194.	The area of the following triangle is ___ cm2.
Answer» The area of the following triangle is ___ $c m^{2}$ .

Discussion

2195.	A mixture of kerosene oil and water is an example of immiscible liquids. When left undisturbed, they form separate layers of oil and water. Can you identify which liquid comes to the bottom and which will be at the top?
Answer» A mixture of kerosene oil and water is an example of immiscible liquids. When left undisturbed, they form separate layers of oil and water. Can you identify which liquid comes to the bottom and which will be at the top?

Discussion

2196.	When does a tornado develop?
Answer» When does a tornado develop?

Discussion

2197.	An object is observed from two points A and B. The object changes its position continuously with respect to A. However, the position of the object is constant with respect to B. Which of the following is/are true?
Answer» An object is observed from two points A and B. The object changes its position continuously with respect to A. However, the position of the object is constant with respect to B. Which of the following is/are true?

Discussion

2198.	20 L of an ideal gas ,present in a piston fitted cylinder at 10atm is allowed to expand in a process in which PV is cons†an t. if final volume of a gas is 60 L then work done by gas is
Answer» 20 L of an ideal gas ,present in a piston fitted cylinder at 10atm is allowed to expand in a process in which PV is cons†an t. if final volume of a gas is 60 L then work done by gas is

Discussion

2199.	Figure shows the graph of elastic potential energy (U) stored versus extension, for a steel wire (Y=2×1011 Pa) of volume 200 cc. If area of cross-section (A) and original length (L), then
Answer» Figure shows the graph of elastic potential energy $(U)$ stored versus extension, for a steel wire $(Y = 2 \times 10^{11} Pa)$ of volume $200 cc$ . If area of cross-section $(A)$ and original length $(L)$ , then

Discussion

2200.	A ball is moving down in different mediums with different speeds as shown in the given options. Select the case in which minimum drag is experienced by the ball.
Answer» A ball is moving down in different mediums with different speeds as shown in the given options. Select the case in which minimum drag is experienced by the ball.

Discussion

Explore topic-wise InterviewSolutions in .

When a thermometer is brought in contact with a hot body, the liquid inside it_________.

The sum of all electromagnetic forces between different particals of a system of charged particals is 0A) only if all the particals are negativelyChargedB) only if all the particals are positively chargedC) only if half is positive and other half is negativeD) irrespective of the signs of charges

45. A person 1.6m tall is standing at the centre between two walls three metre high. What is the minimum size of the plane mirror fixed on the wall in front of him if he is to see the full size of the wall behind him?

The kinetic energy of a particle depends on the square of speed of the particle. If error in measurement of speed is 30%, the error in the measurement of kinetic energy will be?Is it 60% or 69%? How?

When a magnetic compass is brought near a current carrying wire then what happens?

Name a device that prevents loss (or gain) of energy by conduction, convection and radiation.

Question 13Lightning and thunder take place in the sky at the same time and at the same distance from us. Lightning is seen earlier and thunder is heard later. Can you explain?

66. Length of a seconds hand in a clock is 10 cm.Find the displacement of its tip in 20 s(1) 103 cm(3) 20\surd3 cm(2) 10 cm(4) 5 cm

where are the poles of a sphere magnet

Please answer me the question in 80 words. ​​​​​​​What precautions will you take while measuring temperature with a laboratory thermometer? What extra precautions will you take while measuring it with a clinical thermometer?

What is the minimum number of rays required to form the image of a point?

Describe the construction, working and usefulness of a dry cell, with the help of a diagram.

a charge q is placed at (1,2,1)and another charge -q is placed at (0,1,0) such that they form an electric dipole there exists a uniform electric field e=2i calculate the torue

What is a Thermister and what are its types?

Define angle of incidence and glance angle of incidence ?

Explain why a car on any city road is an example of a non-uniform motion.

7.A particle moves along a straight line for 10 seconds with uniform acceleration, a= 2m/s² then for next 10 seconds moves with acceleration a= 4 m/s² the total displacement of particle would be

The hyperconjugative stabilities of tert-butyl cation and 2-butene, respectively, are due to (A)-> p(empty) and-> * electron delocalisations (B)->* and-> electron delocalisations (C)-> p(filled) and-> electron delocalisations (D) p(filled) ->* and-> * electron delocalisations

Suppose you have two magnets whose ends are marked as South Pole and North Pole. You have to keep two magnets such that one magnet is upon other magnet and also their North Poles are on same side. How will these magnets behave?

A ball collides directly with another ball at rest and is brought to rest by the impact. If half of the initial kinetic energy is lost in the impact, then the coefficient of restitution is 1/4 1/2 3/4 1/1.414

___ objects allow light, to pass through them partially.

Two wires of the same material (Young’s modulus Y) and same length L but radii R and 2R respectively are joined end to end and a weight w is suspended from the combination as shown in the figure. The elastic potential energy in the system is

Like charges ___ and unlike charges ___ each other.

o is the point on the ground chosen as origin. A body first suffers a displacement of 10\sqrt2 m North East, next 10 m North and finally 10\sqrt2 m North West. How far is it from origin

Find the volume of a sphere whose radius is 0.63 m.[Assume π=227]

Soft iron pieces are placed across the ends of bar magnets when stored. What are such pieces called?

19.the bob of a pendulum at rest is given a sharp hit to impart a horizontal velocity of (10gl)1/2where l is length of pendulum. Find the speed of pendulum when its tangential acceleration is g

what is the sign convection of v" u and r used in the formula of refraction through curved surface

Lightning is a/an ___ on a huge scale.Identify an appropriate option.

Identify the type of mirror used in these following figures.

Of2 hyberdysation

A equi convex lens (R1 = R2 = 10 cm) (μ = 1.5) having, focal length equal to focal length of concave mirror. The radius of cuvarture of concave mirror is Options: 10 cm 20 cm 40 cm 15 cm

16. A ring of mass 'm' and radius 'R' rolls down arough inclined plane of angle 'e'. Friction force onthe ring ismg sin(1)mg sin(2)35mg sin e2(3)(4) mg sine

On the earth surface a simple pendulum has time period T. It is taken to another planet having acceleration due to gravity half and density nine times that of earth . The time period of the pendulum on the new planet will be

36. Is density intensive or extensive property?

Why are gold leaves used to make an electroscope more sensitive?

An iron ball at temperature of 45∘C is dropped in a glass of water. What is the temperature of water, if there is no heat flow between water and the iron ball?

Calculate the buoyant force (in N) acting on a 250 g rubik's cube of side length 8 cm, if only half of it is submerged in kerosene. The rubik's cube is hanging by a thread. Density of kerosene is 0.8 g cm−3. Take g=10 m s−2.2.048

Which state of matter has the largest space between its particles.

Which of the following position-time graphs represents uniform motion?

The area of the following triangle is ___ cm2.

A mixture of kerosene oil and water is an example of immiscible liquids. When left undisturbed, they form separate layers of oil and water. Can you identify which liquid comes to the bottom and which will be at the top?

When does a tornado develop?

An object is observed from two points A and B. The object changes its position continuously with respect to A. However, the position of the object is constant with respect to B. Which of the following is/are true?

20 L of an ideal gas ,present in a piston fitted cylinder at 10atm is allowed to expand in a process in which PV is cons†an t. if final volume of a gas is 60 L then work done by gas is

Figure shows the graph of elastic potential energy (U) stored versus extension, for a steel wire (Y=2×1011 Pa) of volume 200 cc. If area of cross-section (A) and original length (L), then

A ball is moving down in different mediums with different speeds as shown in the given options. Select the case in which minimum drag is experienced by the ball.

Please answer me the question in 80 words. What precautions will you take while measuring temperature with a laboratory thermometer? What extra precautions will you take while measuring it with a clinical thermometer?

Like charges _ and unlike charges _ each other.