9478 + Interview Questions in Physics Page 15 InterviewSolution

701.	WHAT IS MATTER WAVES? EXPLAIN IN DETAIL
Answer» WHAT IS MATTER WAVES? EXPLAIN IN DETAIL

Discussion

702.	What will happen when a beam of light strikes a smooth marble floor?
Answer» What will happen when a beam of light strikes a smooth marble floor?

Discussion

703.	A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal? Why?
Answer» A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal? Why?

Discussion

704.	A hollow sphere of radius r rolls without slipping in a hemisphere of radius 4r.Calculate the frequency of small oscillations about P as shown in the figure.
Answer» A hollow sphere of radius r rolls without slipping in a hemisphere of radius 4r.Calculate the frequency of small oscillations about P as shown in the figure.

Discussion

705.	150 spherical marbles, each of diameter 1.4cm are dropped in a cylindrical vessel of diameter 7cm containing some water, which are completely immersed in water. Find the rise in the level of water in the vessel.
Answer» 150 spherical marbles, each of diameter 1.4cm are dropped in a cylindrical vessel of diameter 7cm containing some water, which are completely immersed in water. Find the rise in the level of water in the vessel.

Discussion

706.	A double star system consists of two stars having masses m and 2m separated by a dis†an ce r. The radius of orbit of heavier star is
Answer» A double star system consists of two stars having masses m and 2m separated by a dis†an ce r. The radius of orbit of heavier star is

Discussion

707.	ntThe force of repulsion between 2 point charges is F, when these are at a distance of 1 m apart. Now the point charges are replaced by spheres of radii 25 cm having the same charge as that of point charges and same distance apart. Then prove that the new force of repulsion will decrease.n
Answer» ntThe force of repulsion between 2 point charges is F, when these are at a distance of 1 m apart. Now the point charges are replaced by spheres of radii 25 cm having the same charge as that of point charges and same distance apart. Then prove that the new force of repulsion will decrease.n

Discussion

708.	An alpha particle is accelerated from rest through a potential of V volts.Its final kinetic energy is
Answer» An alpha particle is accelerated from rest through a potential of V volts.Its final kinetic energy is

Discussion

709.	___________substances can be strongly magnetized.
Answer» ___________substances can be strongly magnetized.

Discussion

710.	What are electro positive and electro negative elements?
Answer» What are electro positive and electro negative elements?

Discussion

711.	We know that sound is produced by a vibrating body. But in real life, why we can't see the vibrations of the body when it produce sound? [2 MARKS]
Answer» We know that sound is produced by a vibrating body. But in real life, why we can't see the vibrations of the body when it produce sound? [2 MARKS]

Discussion

712.	Pritish pulls a load up an inclined road. What is/are the force(s) he must overcome to pull it up?
Answer» Pritish pulls a load up an inclined road. What is/are the force(s) he must overcome to pull it up?

Discussion

713.	__________ offers hinderance to the flow of electrons.
Answer» __________ offers hinderance to the flow of electrons.

Discussion

714.	For an isolated body that explodes into multiple pieces, explain in detail what changes are expected for its gravitational potential energy and it's kinetic energy
Answer» For an isolated body that explodes into multiple pieces, explain in detail what changes are expected for its gravitational potential energy and it's kinetic energy

Discussion

715.	(a) What do you meant by 'streamlined shape'? Name an object which usually has a streamlined shape. (b) Explain why, objects moving in fluids should have streamlined shape.
Answer» (a) What do you meant by 'streamlined shape'? Name an object which usually has a streamlined shape. (b) Explain why, objects moving in fluids should have streamlined shape.

Discussion

716.	Explain why it is not safe to go out with an umbrella when there is heavy rain, lightning or thunder.
Answer» Explain why it is not safe to go out with an umbrella when there is heavy rain, lightning or thunder.

Discussion

717.	A body shape which offers very little resistance to the flow of air (or water) around it is called: (a) trimlined shape (b) steamlined shape (c) streaklined shape (d) streamlined shape
Answer» A body shape which offers very little resistance to the flow of air (or water) around it is called: (a) trimlined shape (b) steamlined shape (c) streaklined shape (d) streamlined shape

Discussion

718.	Two tiny holes are made in a plastic bucket, one near the missle part and the other just above bottom. When this bucket is filled with water, the water rushes out from the bottom hole much faster than from the upper hole. What conclusion do you get from this observation?
Answer» Two tiny holes are made in a plastic bucket, one near the missle part and the other just above bottom. When this bucket is filled with water, the water rushes out from the bottom hole much faster than from the upper hole. What conclusion do you get from this observation?

Discussion

719.	What can introduce about the orbital frequency and the rotational frequency of moon ?what is their ratio?
Answer» What can introduce about the orbital frequency and the rotational frequency of moon ?what is their ratio?

Discussion

720.	the dimensional formula of the modulus of rigidity i
Answer» the dimensional formula of the modulus of rigidity i

Discussion

721.	x^2 +x-(a+1)(a+2)
Answer» x^2 +x-(a+1)(a+2)

Discussion

722.	The refractive index of a liquid is 5/3. A Ray of light travelling in this liquid falls at interface of liquid and air. At what angle of incidence should it fall on liquid-air interface so that it suffers a total internal reflection?
Answer» The refractive index of a liquid is 5/3. A Ray of light travelling in this liquid falls at interface of liquid and air. At what angle of incidence should it fall on liquid-air interface so that it suffers a total internal reflection?

Discussion

723.	How do clouds get charged
Answer» How do clouds get charged

Discussion

724.	Match the following : Column A Column B (a) Blowing air increases (i) increase in inter-molecular separation (b) Increase in pressure increases (ii) pendulum of a clock (c) Thermal expansion (iii) cooking utensils (d) Invar (iv) boiling point (e) Pyrex glass (v) evaporation
Answer» Match the following : Column A Column B (a) Blowing air increases (i) increase in inter-molecular separation (b) Increase in pressure increases (ii) pendulum of a clock (c) Thermal expansion (iii) cooking utensils (d) Invar (iv) boiling point (e) Pyrex glass (v) evaporation

724.

Match the following : Column A Column B (a) Blowing air increases (i) increase in inter-molecular separation (b) Increase in pressure increases (ii) pendulum of a clock (c) Thermal expansion (iii) cooking utensils (d) Invar (iv) boiling point (e) Pyrex glass (v) evaporation

Answer»

Match the following :

Column A Column B

(a) Blowing air increases (i) increase in inter-molecular separation

(b) Increase in pressure increases (ii) pendulum of a clock

(c) Thermal expansion (iii) cooking utensils

(d) Invar (iv) boiling point

(e) Pyrex glass (v) evaporation

Discussion

725.	Which among the following frequencies is inaudible to humans?
Answer» Which among the following frequencies is inaudible to humans?

Discussion

726.	Question 4 (a) The planet which is farthest from the sun is _________.
Answer» Question 4 (a) The planet which is farthest from the sun is _________.

726.

Question 4 (a) The planet which is farthest from the sun is _________.

Answer»

Question 4 (a)

The planet which is farthest from the sun is _________.

Discussion

727.	Two forces of magnitude 20 N and 10 N are acting on a box in the opposite direction. What is the magnitude of the net force acting on the box?
Answer» Two forces of magnitude 20 N and 10 N are acting on a box in the opposite direction. What is the magnitude of the net force acting on the box?

Discussion

728.	A plane wavefront is travelling from air to glass. It is incident at an angle of incidence of 45∘ on the glass surface. If the ratio of width of wavefront in air to that in glass is √2√3, find the refractive index of glass.
Answer» A plane wavefront is travelling from air to glass. It is incident at an angle of incidence of $45^{\circ}$ on the glass surface. If the ratio of width of wavefront in air to that in glass is $\frac{\sqrt{2}}{\sqrt{3}}$ , find the refractive index of glass.

Discussion

729.	Write two main difference between the nature of diamond and graphite.
Answer» Write two main difference between the nature of diamond and graphite.

Discussion

730.	Using a thread and a scale how will you find the circumference of a one-rupee coin.
Answer» Using a thread and a scale how will you find the circumference of a one-rupee coin.

Discussion

731.	The change of state of water from liquid to solid (ice) is called ___ .
Answer» The change of state of water from liquid to solid (ice) is called ___ .

Discussion

732.	Convert 6 radians into degree measure.
Answer» Convert 6 radians into degree measure.

Discussion

733.	The velocity-time graph (v-t) of a car moving along a level road is shown below. The average speed of the car in the time interval 0 to 8 is abou
Answer» The velocity-time graph (v-t) of a car moving along a level road is shown below. The average speed of the car in the time interval 0 to 8 is abou

Discussion

734.	Explain the difference between soft and loud sound using diagrams. [3 MARKS]
Answer» Explain the difference between soft and loud sound using diagrams. [3 MARKS]

Discussion

735.	How can you increase the strength of an electromagnet?
Answer» How can you increase the strength of an electromagnet?

Discussion

736.	what is ionisation energy one, ionisation energy two and ionisation energy three?
Answer» what is ionisation energy one, ionisation energy two and ionisation energy three?

Discussion

737.	TWO RAIN DROPS OF WATER REACH THE EARTH SURFACE WITH THE TERMINAL VELOCITY IN THE RATIO OF 4:9 . THE RATIO OF THEIR MASSES WILL BE
Answer» TWO RAIN DROPS OF WATER REACH THE EARTH SURFACE WITH THE TERMINAL VELOCITY IN THE RATIO OF 4:9 . THE RATIO OF THEIR MASSES WILL BE

Discussion

738.	Earliest time piece in record
Answer» Earliest time piece in record

Discussion

739.	A parallel plate capacitor of capacitance 100 pF isconstructed by using paper sheets of 1 mm thickne bdielectric. If the dielectric constant of paper ss asber of circular metal foils of diameter 2 cm each rfor the purpose is:(a) 40(c) 30(b) 20(d) 10
Answer» A parallel plate capacitor of capacitance 100 pF isconstructed by using paper sheets of 1 mm thickne bdielectric. If the dielectric constant of paper ss asber of circular metal foils of diameter 2 cm each rfor the purpose is:(a) 40(c) 30(b) 20(d) 10

Discussion

740.	A box of mass 2 kg is lifted diagonally from point A to point B as shown in the given figure. Given that the acceleration due to gravity is 10 ms−2, what is the gravitational potential energy gained by the box?
Answer» A box of mass 2 kg is lifted diagonally from point A to point B as shown in the given figure. Given that the acceleration due to gravity is 10 $m s^{- 2}$ , what is the gravitational potential energy gained by the box?

Discussion

741.	two bodies fall freely from different heights find distance between them in 3 sec
Answer» two bodies fall freely from different heights find distance between them in 3 sec

Discussion

742.	A sound wave having a wavelength of 20 cm is travelling in water. If the velocity of sound in water is 1600 ms−1 then, find the frequency of the sound wave.
Answer» A sound wave having a wavelength of 20 cm is travelling in water. If the velocity of sound in water is $1600 m s^{- 1}$ then, find the frequency of the sound wave.

Discussion

743.	A body moving unformly along a circular path has (i)same direction of motion (ii) constant velocity (iii)constant speed(iv)variable speed
Answer» A body moving unformly along a circular path has (i)same direction of motion (ii) constant velocity (iii)constant speed (iv)variable speed

Discussion

744.	What will happen if we do not oil machine parts?
Answer» What will happen if we do not oil machine parts?

Discussion

745.	3. Zn\|Zn2+(.024M)\|\|Zn2+\|(2.4M)\|Zn(s) Find emf
Answer» 3. Zn\|Zn2+(.024M)\|\|Zn2+\|(2.4M)\|Zn(s) Find emf

Discussion

746.	x/(y+z)=x/y+x/z true or false
Answer» x/(y+z)=x/y+x/z true or false

Discussion

747.	EET & AIMSA col of self inductance 50H is joined to the terminals of a battery of em.f. 2 V through a resistance of 10 Qa steady current is nlowing through the circuit. If the battery is now disconnected then time in which thecurrent will decay to e of its steady value is(1) 500 s(2) 50 s3 5 s(4) 0.5 s
Answer» EET & AIMSA col of self inductance 50H is joined to the terminals of a battery of em.f. 2 V through a resistance of 10 Qa steady current is nlowing through the circuit. If the battery is now disconnected then time in which thecurrent will decay to e of its steady value is(1) 500 s(2) 50 s3 5 s(4) 0.5 s

Discussion

748.	A football player kicks a ball of 0.5 kg and imparts a velocity of 10m/s. The contact odf foot and ball is only for 1/50th of second . The kicking force is?
Answer» A football player kicks a ball of 0.5 kg and imparts a velocity of 10m/s. The contact odf foot and ball is only for 1/50th of second . The kicking force is?

Discussion

749.	charges can be created or destroyed in equal and unlike pairs only .pl explain
Answer» charges can be created or destroyed in equal and unlike pairs only .pl explain

Discussion

750.	In a gold leaf electroscope, its stem is made up of :
Answer» In a gold leaf electroscope, its stem is made up of :

Discussion

Explore topic-wise InterviewSolutions in .

WHAT IS MATTER WAVES? EXPLAIN IN DETAIL

What will happen when a beam of light strikes a smooth marble floor?

A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal? Why?

A hollow sphere of radius r rolls without slipping in a hemisphere of radius 4r.Calculate the frequency of small oscillations about P as shown in the figure.

150 spherical marbles, each of diameter 1.4cm are dropped in a cylindrical vessel of diameter 7cm containing some water, which are completely immersed in water. Find the rise in the level of water in the vessel.

A double star system consists of two stars having masses m and 2m separated by a dis†an ce r. The radius of orbit of heavier star is

ntThe force of repulsion between 2 point charges is F, when these are at a distance of 1 m apart. Now the point charges are replaced by spheres of radii 25 cm having the same charge as that of point charges and same distance apart. Then prove that the new force of repulsion will decrease.n

An alpha particle is accelerated from rest through a potential of V volts.Its final kinetic energy is

___________substances can be strongly magnetized.

What are electro positive and electro negative elements?

We know that sound is produced by a vibrating body. But in real life, why we can't see the vibrations of the body when it produce sound? [2 MARKS]

Pritish pulls a load up an inclined road. What is/are the force(s) he must overcome to pull it up?

__________ offers hinderance to the flow of electrons.

For an isolated body that explodes into multiple pieces, explain in detail what changes are expected for its gravitational potential energy and it's kinetic energy

(a) What do you meant by 'streamlined shape'? Name an object which usually has a streamlined shape. (b) Explain why, objects moving in fluids should have streamlined shape.

Explain why it is not safe to go out with an umbrella when there is heavy rain, lightning or thunder.

A body shape which offers very little resistance to the flow of air (or water) around it is called: (a) trimlined shape (b) steamlined shape (c) streaklined shape (d) streamlined shape

Two tiny holes are made in a plastic bucket, one near the missle part and the other just above bottom. When this bucket is filled with water, the water rushes out from the bottom hole much faster than from the upper hole. What conclusion do you get from this observation?

What can introduce about the orbital frequency and the rotational frequency of moon ?what is their ratio?

the dimensional formula of the modulus of rigidity i

x^2 +x-(a+1)(a+2)

The refractive index of a liquid is 5/3. A Ray of light travelling in this liquid falls at interface of liquid and air. At what angle of incidence should it fall on liquid-air interface so that it suffers a total internal reflection?

How do clouds get charged

Match the following : Column A Column B (a) Blowing air increases (i) increase in inter-molecular separation (b) Increase in pressure increases (ii) pendulum of a clock (c) Thermal expansion (iii) cooking utensils (d) Invar (iv) boiling point (e) Pyrex glass (v) evaporation

Which among the following frequencies is inaudible to humans?

Question 4 (a) The planet which is farthest from the sun is _________.

Two forces of magnitude 20 N and 10 N are acting on a box in the opposite direction. What is the magnitude of the net force acting on the box?

A plane wavefront is travelling from air to glass. It is incident at an angle of incidence of 45∘ on the glass surface. If the ratio of width of wavefront in air to that in glass is √2√3, find the refractive index of glass.

Write two main difference between the nature of diamond and graphite.

Using a thread and a scale how will you find the circumference of a one-rupee coin.

The change of state of water from liquid to solid (ice) is called ___ .

Convert 6 radians into degree measure.

The velocity-time graph (v-t) of a car moving along a level road is shown below. The average speed of the car in the time interval 0 to 8 is abou

Explain the difference between soft and loud sound using diagrams. [3 MARKS]

How can you increase the strength of an electromagnet?

what is ionisation energy one, ionisation energy two and ionisation energy three?

TWO RAIN DROPS OF WATER REACH THE EARTH SURFACE WITH THE TERMINAL VELOCITY IN THE RATIO OF 4:9 . THE RATIO OF THEIR MASSES WILL BE

Earliest time piece in record

A parallel plate capacitor of capacitance 100 pF isconstructed by using paper sheets of 1 mm thickne bdielectric. If the dielectric constant of paper ss asber of circular metal foils of diameter 2 cm each rfor the purpose is:(a) 40(c) 30(b) 20(d) 10

A box of mass 2 kg is lifted diagonally from point A to point B as shown in the given figure. Given that the acceleration due to gravity is 10 ms−2, what is the gravitational potential energy gained by the box?

two bodies fall freely from different heights find distance between them in 3 sec

A sound wave having a wavelength of 20 cm is travelling in water. If the velocity of sound in water is 1600 ms−1 then, find the frequency of the sound wave.

A body moving unformly along a circular path has (i)same direction of motion (ii) constant velocity (iii)constant speed(iv)variable speed

What will happen if we do not oil machine parts?

3. Zn|Zn2+(.024M)||Zn2+|(2.4M)|Zn(s) Find emf

x/(y+z)=x/y+x/z true or false

A football player kicks a ball of 0.5 kg and imparts a velocity of 10m/s. The contact odf foot and ball is only for 1/50th of second . The kicking force is?

charges can be created or destroyed in equal and unlike pairs only .pl explain

In a gold leaf electroscope, its stem is made up of :