16569 + Interview Questions in Physics

1.	What is silviculture? What are its advantages?
Answer» What is silviculture? What are its advantages?

Discussion

2.	How do atoms exist?
Answer» How do atoms exist?

Discussion

3.	What are the damped vibrations? How do they differ from the free vibrations? Give one example of each.
Answer» What are the damped vibrations? How do they differ from the free vibrations? Give one example of each.

Discussion

4.	A coin is thrown in a vertically upward direction with a velocity of 5 ms−1. If the acceleration of the coin during its motion is 10 ms−2 in the downward direction, what will be the height attained by the coin and how much time will it take to reach there ?
Answer» A coin is thrown in a vertically upward direction with a velocity of $5 m s^{- 1}$ . If the acceleration of the coin during its motion is $10 m s^{- 2}$ in the downward direction, what will be the height attained by the coin and how much time will it take to reach there ?

Discussion

5.	The cells which derive electrical energy by irreversible chemical reactions are called __ cells.
Answer» The cells which derive electrical energy by irreversible chemical reactions are called __ cells.

Discussion

6.	Electrons in an atom revolve around the nucleus in certain selected concentric paths which are called orbits. Which of the following orbit do you think will have highest energy?
Answer» Electrons in an atom revolve around the nucleus in certain selected concentric paths which are called orbits. Which of the following orbit do you think will have highest energy?

Discussion

7.	The near point of a hypermetropic eye is 1 m. What is the power of the lens required to correct this defect? (Assuming that the near point of a normal eye is 25 cm)
Answer» The near point of a hypermetropic eye is 1 m. What is the power of the lens required to correct this defect? (Assuming that the near point of a normal eye is 25 cm)

Discussion

8.	How does our brain interpret the image that is formed on the retina?
Answer» How does our brain interpret the image that is formed on the retina?

Discussion

9.	Identify greenhouse gas from the given options:
Answer» Identify greenhouse gas from the given options:

Discussion

10.	When exposed to electric field, particles are deviated towards the positive electrode or plate.
Answer» When exposed to electric field, particles are deviated towards the positive electrode or plate.

Discussion

11.	What is the composition of liquefied petroleum gas (LPG) ?
Answer» What is the composition of liquefied petroleum gas (LPG) ?

Discussion

12.	Which among the following equations give the correct relation between Resistance(R), length of conductor(L), Area of cross-section of the conductor(A) and resistivity (ρ)?
Answer» Which among the following equations give the correct relation between Resistance(R), length of conductor(L), Area of cross-section of the conductor(A) and resistivity $(ρ)$ ?

Discussion

13.	A light ray gets reflected from a pair of mutually perpendicular mirrors not necessarily along axes .The intersection point of mirrors is at origin .The incident light Rey is along y=x+2.If the light ray strike both mirros in succession,then it may get reflected finally along the line
Answer» A light ray gets reflected from a pair of mutually perpendicular mirrors not necessarily along axes .The intersection point of mirrors is at origin .The incident light Rey is along y=x+2.If the light ray strike both mirros in succession,then it may get reflected finally along the line

Discussion

14.	What is an iris and where is it located?
Answer» What is an iris and where is it located?

Discussion

15.	Question 5 Use the data in Table to answer the following – (a) Which among iron and mercury is a better conductor? (b) Which material is the best conductor? Table: Electrical resistivity of some substances at 20∘C MaterialResistivity(Ωm)ConductorsSilver1.60×10−8Copper1.62×10−8Aluminium2.63×10−8Tungsten5.20×10−8Nickel6.84×10−8Iron10.0×10−8Chromium12.9×10−8Mercury94.0×10−8Manganese1.84×10−6AlloysConstantan(alloy of Cu Ni)49×10−6Manganin(alloy of Cu,Mn and Ni)44×10−6Nichrome(alloy of Ni,Cr,Mn and Fe)100×10−6InsulatorsGlass1010−1014Hard rubber1013−1016Ebonite1015−1017Diamond1012−1013Paper(dry)1012
Answer» Question 5 Use the data in Table to answer the following – (a) Which among iron and mercury is a better conductor? (b) Which material is the best conductor? Table: Electrical resistivity of some substances at $20^{\circ} C$ $\begin{matrix} M a t e r i a l & R e s i s t i v i t y (Ω m) C o n d u c t o r s & S i l v e r & 1.60 \times 10^{- 8} C o p p e r & 1.62 \times 10^{- 8} A l u m i n i u m & 2.63 \times 10^{- 8} T u n g s t e n & 5.20 \times 10^{- 8} N i c k e l & 6.84 \times 10^{- 8} I r o n & 10.0 \times 10^{- 8} C h r o m i u m & 12.9 \times 10^{- 8} M e r c u r y & 94.0 \times 10^{- 8} M a n g a n e s e & 1.84 \times 10^{- 6} A l l o y s & C o n s t a n t a n (a l l o y o f C u N i) & 49 \times 10^{- 6} M a n g a n i n (a l l o y o f C u, M n a n d N i) & 44 \times 10^{- 6} N i c h r o m e (a l l o y o f N i, C r, M n a n d F e) & 100 \times 10^{- 6} I n s u l a t o r s & G l a s s & 10^{10} - 10^{14} H a r d r u b b e r & 10^{13} - 10^{16} E b o n i t e & 10^{15} - 10^{17} D i a m o n d & 10^{12} - 10^{13} P a p e r (d r y) & 10^{12} \end{matrix}$

Discussion

16.	A geo-stationary satellite is orbiting around earth at height of 30,000 km in circular orbit. The radius of the earth is taken as 6000 km. The geo-stationary satellite comes back to its position after one revolution in exactly 24 hours. Let the acceleration due to gravity (g) be 10 m/s2 and mass of satellite be 1000 kg; calculate the work done in 12 hours when moving under gravitational force.
Answer» A geo-stationary satellite is orbiting around earth at height of 30,000 km in circular orbit. The radius of the earth is taken as 6000 km. The geo-stationary satellite comes back to its position after one revolution in exactly 24 hours. Let the acceleration due to gravity (g) be 10 $m / s^{2}$ and mass of satellite be 1000 kg; calculate the work done in 12 hours when moving under gravitational force.

Discussion

17.	If the angle of incidence is twice the angle of refraction in a medium of refractive index μ, then angle of incidence is
Answer» If the angle of incidence is twice the angle of refraction in a medium of refractive index $μ$ , then angle of incidence is

Discussion

18.	The boiling point of the water is defined as:
Answer» The boiling point of the water is defined as:

Discussion

19.	Name the process used for producing electricity from nuclear energy.
Answer» Name the process used for producing electricity from nuclear energy.

Discussion

20.	A ball of mass 0.5 kg slows down from a speed of 5 m s−1 to that of 3 m s−1. Calculate the change in kinetic energy of the ball.
Answer» A ball of mass 0.5 kg slows down from a speed of 5 m $s^{- 1}$ to that of 3 m $s^{- 1}$ . Calculate the change in kinetic energy of the ball.

Discussion

21.	A positively-charged particle (alpha-particle) projected towards west is deflected towards north by a magnetic field. The direction of magnetic field is ___.
Answer» A positively-charged particle (alpha-particle) projected towards west is deflected towards north by a magnetic field. The direction of magnetic field is ___.

Discussion

22.	Hello Mam/Sir, Can u plez provide me MCQ'S of Science CH Light Reflection and Refraction Thank you
Answer» Hello Mam/Sir, Can u plez provide me MCQ'S of Science CH Light Reflection and Refraction Thank you

Discussion

23.	Name the rivers with which of the following dams are associated: (a) Tehri Dam (b) Sardar Sarovar Dam (c) Bhakra Dam
Answer» Name the rivers with which of the following dams are associated: (a) Tehri Dam (b) Sardar Sarovar Dam (c) Bhakra Dam

Discussion

24.	Rutherford's α - particle scattering experiment showed that A. Electrons have a negative charge. B. The mass and the positive charge of the atom are concentrated in the nucleus. C. Neutron exists in the nucleus. D. Most of the space in the atom is empty. Which of the above statements are correct?
Answer» Rutherford's $α$ - particle scattering experiment showed that A. Electrons have a negative charge. B. The mass and the positive charge of the atom are concentrated in the nucleus. C. Neutron exists in the nucleus. D. Most of the space in the atom is empty. Which of the above statements are correct?

Discussion

25.	Law of conservation of energy states that energy neither be created nor be destroyed then why we have to conserve energy
Answer» Law of conservation of energy states that energy neither be created nor be destroyed then why we have to conserve energy

Discussion

26.	What is a volt? Defined very clearly please.
Answer» What is a volt? Defined very clearly please.

Discussion

27.	We, all have bought a fuse for our household. Ever wondered what the rating in the fuse actually means? Suppose you bought a fuse of rating 12, then it means that:
Answer» We, all have bought a fuse for our household. Ever wondered what the rating in the fuse actually means? Suppose you bought a fuse of rating 12, then it means that:

Discussion

28.	Write the lens formula explaining the meaning of the symbols used.
Answer» Write the lens formula explaining the meaning of the symbols used.

Discussion

29.	A ruler scale is balanced with two fingers, F1 and F2 at a separation 20 cm and 40 cm from the centre of the scale O respectively. If the person balancing the ruler tries to bring his fingers closer to the centre, which finger will slide first?
Answer» A ruler scale is balanced with two fingers, $F_{1}$ and $F_{2}$ at a separation 20 cm and 40 cm from the centre of the scale O respectively. If the person balancing the ruler tries to bring his fingers closer to the centre, which finger will slide first?

Discussion

30.	Light enters from air into diamond which has a refractive index of 2.42. Calculate the speed of light in diamond. The speed of light in air is 3.0 x 108ms−1.
Answer» Light enters from air into diamond which has a refractive index of 2.42. Calculate the speed of light in diamond. The speed of light in air is 3.0 x $10^{8} m s^{- 1}$ .

Discussion

31.	If you were going to connect two light bulbs to one battery, would you use a series or a parallel arrangement? Why? Which arrangement takes more current from the battery?
Answer» If you were going to connect two light bulbs to one battery, would you use a series or a parallel arrangement? Why? Which arrangement takes more current from the battery?

Discussion

32.	The unit of current is : (a) ampere (b) volt (c) ohm (d) coulomb.
Answer» The unit of current is : (a) ampere (b) volt (c) ohm (d) coulomb.

32.

The unit of current is : (a) ampere (b) volt (c) ohm (d) coulomb.

Answer»

The unit of current is :

(a) ampere (b) volt

(c) ohm (d) coulomb.

Discussion

33.	A monochromatic point source of light 'O' is seen through a rectangular glass block ABCD. Paths of two rays, in and outside the block, are shown in the given figure. For the same rectangular glass block, the colour from the visible spectrum that produces maximum shift is:
Answer» A monochromatic point source of light 'O' is seen through a rectangular glass block ABCD. Paths of two rays, in and outside the block, are shown in the given figure. For the same rectangular glass block, the colour from the visible spectrum that produces maximum shift is:

33.

A monochromatic point source of light 'O' is seen through a rectangular glass block ABCD. Paths of two rays, in and outside the block, are shown in the given figure. For the same rectangular glass block, the colour from the visible spectrum that produces maximum shift is:

Answer»

A monochromatic point source of light 'O' is seen through a rectangular glass block ABCD. Paths of two rays, in and outside the block, are shown in the given figure.

For the same rectangular glass block, the colour from the visible spectrum that produces maximum shift is:

Discussion

34.	How many bullets each of 5cm in diameter can be cast from a rectangular block of metal 11dm 1m5dm?
Answer» How many bullets each of 5cm in diameter can be cast from a rectangular block of metal 11dm 1m5dm?

Discussion

35.	Question 131(ii) This table shows the mass of one atom for five chemical elements. Use it to answer the questions given. ElementsMass of atom(kg)Titanium7.95×10−26Lead3.44×10−25Silver1.79×10−25Lithium1.15×10−26Hydrogen1.674×10−27 Which element is lighter, Silver or Titanium?
Answer» Question 131(ii) This table shows the mass of one atom for five chemical elements. Use it to answer the questions given. $\begin{matrix} E l e m e n t s & M a s s o f a t o m (k g) T i t a n i u m & 7.95 \times 10^{- 26} L e a d & 3.44 \times 10^{- 25} S i l v e r & 1.79 \times 10^{- 25} L i t h i u m & 1.15 \times 10^{- 26} H y d r o g e n & 1.674 \times 10^{- 27} \end{matrix}$ Which element is lighter, Silver or Titanium?

35.

Question 131(ii) This table shows the mass of one atom for five chemical elements. Use it to answer the questions given. ElementsMass of atom(kg)Titanium7.95×10−26Lead3.44×10−25Silver1.79×10−25Lithium1.15×10−26Hydrogen1.674×10−27 Which element is lighter, Silver or Titanium?

Answer»

Question 131(ii)

This table shows the mass of one atom for five chemical elements.
Use it to answer the questions given.
$\begin{matrix} E l e m e n t s & M a s s o f a t o m (k g) T i t a n i u m & 7.95 \times 10^{- 26} L e a d & 3.44 \times 10^{- 25} S i l v e r & 1.79 \times 10^{- 25} L i t h i u m & 1.15 \times 10^{- 26} H y d r o g e n & 1.674 \times 10^{- 27} \end{matrix}$

Which element is lighter, Silver or Titanium?

Discussion

36.	A centripetal force of 10 N is acting on a body in the circular motion of radius 1 m. The work done by the force in one revolution is ___J.
Answer» A centripetal force of 10 N is acting on a body in the circular motion of radius 1 m. The work done by the force in one revolution is ___J.

Discussion

37.	A planet of mass m and radius r is surrounded by an atmosphere of constant density. The atmosphere consists of an ideal gas of molar mass M and its thickness (radial) is h (h << r) from the surface. The temperature of the atmosphere on the surface of the planet is [R = universal gas constant]
Answer» A planet of mass m and radius r is surrounded by an atmosphere of constant density. The atmosphere consists of an ideal gas of molar mass M and its thickness (radial) is h (h << r) from the surface. The temperature of the atmosphere on the surface of the planet is [R = universal gas constant]

Discussion

38.	What is mean by gravitational energy of the Moon?
Answer» What is mean by gravitational energy of the Moon?

Discussion

39.	The metallic pointer of a plotting compass gets deflected only when it is placed near a bar magnet because the pointer has : (a) electromagnetism (b) permanent magnetism (c) induced magnetism (d) ferromagnetism
Answer» The metallic pointer of a plotting compass gets deflected only when it is placed near a bar magnet because the pointer has : (a) electromagnetism (b) permanent magnetism (c) induced magnetism (d) ferromagnetism

39.

The metallic pointer of a plotting compass gets deflected only when it is placed near a bar magnet because the pointer has : (a) electromagnetism (b) permanent magnetism (c) induced magnetism (d) ferromagnetism

Answer»

The metallic pointer of a plotting compass gets deflected only when it is placed near a bar magnet because the pointer has :

(a) electromagnetism

(b) permanent magnetism

(c) induced magnetism

(d) ferromagnetism

Discussion

40.	The velocity of sound in a solid medium varies with the elastic modulus (E) of the medium as:
Answer» The velocity of sound in a solid medium varies with the elastic modulus ( $E$ ) of the medium as:

Discussion

41.	Explanation for its shape formation! Why is the rainbow formed in semicircle shape ?
Answer» Explanation for its shape formation! Why is the rainbow formed in semicircle shape ?

Discussion

42.	What is the reason for constant potential difference in a battery?
Answer» What is the reason for constant potential difference in a battery?

Discussion

43.	What is phase in electricals
Answer» What is phase in electricals

Discussion

44.	What is the role of commutator in generator
Answer» What is the role of commutator in generator

Discussion

45.	A body at a height possesses: (a) kinetic energy (b) potential energy (c) solar energy (d) heat energy.
Answer» A body at a height possesses: (a) kinetic energy (b) potential energy (c) solar energy (d) heat energy.

45.

A body at a height possesses: (a) kinetic energy (b) potential energy (c) solar energy (d) heat energy.

Answer»

A body at a height possesses:

(a) kinetic energy (b) potential energy

(c) solar energy (d) heat energy.

Discussion

46.	If the work done on a body at two instances i.e., at 20 s and 40 s is same, then what is the ratio of the power?
Answer» If the work done on a body at two instances i.e., at $20 s$ and $40 s$ is same, then what is the ratio of the power?

Discussion

47.	In Tyndall effect, the colour of light that is scattered depends on
Answer» In Tyndall effect, the colour of light that is scattered depends on

Discussion

48.	A child on the skateboard is moving at the speed of 2 ms. After a force acts on him, his speed becomes 3 ms. Calculate the work done by the external force on the child. Given the weight of the child is 20 kg.
Answer» A child on the skateboard is moving at the speed of 2 $\frac{m}{s}$ . After a force acts on him, his speed becomes 3 $\frac{m}{s}$ . Calculate the work done by the external force on the child. Given the weight of the child is 20 kg.

Discussion

49.	Why we use minus sign in the formula of magnification of mirror? m= -v/u
Answer» Why we use minus sign in the formula of magnification of mirror? m= -v/u

49.

Why we use minus sign in the formula of magnification of mirror? m= -v/u

Answer»

Why we use minus sign in the formula of magnification of mirror?

m= -v/u

Discussion

50.	Calculate the resistivity of a wire of length 1m and 0.01cm and resistance 20ohm
Answer» Calculate the resistivity of a wire of length 1m and 0.01cm and resistance 20ohm

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is silviculture? What are its advantages?

How do atoms exist?

What are the damped vibrations? How do they differ from the free vibrations? Give one example of each.

A coin is thrown in a vertically upward direction with a velocity of 5 ms−1. If the acceleration of the coin during its motion is 10 ms−2 in the downward direction, what will be the height attained by the coin and how much time will it take to reach there ?

The cells which derive electrical energy by irreversible chemical reactions are called __ cells.

Electrons in an atom revolve around the nucleus in certain selected concentric paths which are called orbits. Which of the following orbit do you think will have highest energy?

The near point of a hypermetropic eye is 1 m. What is the power of the lens required to correct this defect? (Assuming that the near point of a normal eye is 25 cm)

How does our brain interpret the image that is formed on the retina?

Identify greenhouse gas from the given options:

When exposed to electric field, particles are deviated towards the positive electrode or plate.

What is the composition of liquefied petroleum gas (LPG) ?

Which among the following equations give the correct relation between Resistance(R), length of conductor(L), Area of cross-section of the conductor(A) and resistivity (ρ)?

A light ray gets reflected from a pair of mutually perpendicular mirrors not necessarily along axes .The intersection point of mirrors is at origin .The incident light Rey is along y=x+2.If the light ray strike both mirros in succession,then it may get reflected finally along the line

What is an iris and where is it located?

If the angle of incidence is twice the angle of refraction in a medium of refractive index μ, then angle of incidence is

The boiling point of the water is defined as:

Name the process used for producing electricity from nuclear energy.

A ball of mass 0.5 kg slows down from a speed of 5 m s−1 to that of 3 m s−1. Calculate the change in kinetic energy of the ball.

A positively-charged particle (alpha-particle) projected towards west is deflected towards north by a magnetic field. The direction of magnetic field is ___.

Hello Mam/Sir, Can u plez provide me MCQ'S of Science CH Light Reflection and Refraction Thank you

Name the rivers with which of the following dams are associated: (a) Tehri Dam (b) Sardar Sarovar Dam (c) Bhakra Dam

Rutherford's α - particle scattering experiment showed that A. Electrons have a negative charge. B. The mass and the positive charge of the atom are concentrated in the nucleus. C. Neutron exists in the nucleus. D. Most of the space in the atom is empty. Which of the above statements are correct?

Law of conservation of energy states that energy neither be created nor be destroyed then why we have to conserve energy

What is a volt? Defined very clearly please.

We, all have bought a fuse for our household. Ever wondered what the rating in the fuse actually means? Suppose you bought a fuse of rating 12, then it means that:

Write the lens formula explaining the meaning of the symbols used.

A ruler scale is balanced with two fingers, F1 and F2 at a separation 20 cm and 40 cm from the centre of the scale O respectively. If the person balancing the ruler tries to bring his fingers closer to the centre, which finger will slide first?

Light enters from air into diamond which has a refractive index of 2.42. Calculate the speed of light in diamond. The speed of light in air is 3.0 x 108ms−1.

If you were going to connect two light bulbs to one battery, would you use a series or a parallel arrangement? Why? Which arrangement takes more current from the battery?

The unit of current is : (a) ampere (b) volt (c) ohm (d) coulomb.

A monochromatic point source of light 'O' is seen through a rectangular glass block ABCD. Paths of two rays, in and outside the block, are shown in the given figure. For the same rectangular glass block, the colour from the visible spectrum that produces maximum shift is:

How many bullets each of 5cm in diameter can be cast from a rectangular block of metal 11dm *1m*5dm?

Question 131(ii) This table shows the mass of one atom for five chemical elements. Use it to answer the questions given. ElementsMass of atom(kg)Titanium7.95×10−26Lead3.44×10−25Silver1.79×10−25Lithium1.15×10−26Hydrogen1.674×10−27 Which element is lighter, Silver or Titanium?

A centripetal force of 10 N is acting on a body in the circular motion of radius 1 m. The work done by the force in one revolution is ___J.

A planet of mass m and radius r is surrounded by an atmosphere of constant density. The atmosphere consists of an ideal gas of molar mass M and its thickness (radial) is h (h &lt;&lt; r) from the surface. The temperature of the atmosphere on the surface of the planet is [R = universal gas constant]

What is mean by gravitational energy of the Moon?

The metallic pointer of a plotting compass gets deflected only when it is placed near a bar magnet because the pointer has : (a) electromagnetism (b) permanent magnetism (c) induced magnetism (d) ferromagnetism

The velocity of sound in a solid medium varies with the elastic modulus (E) of the medium as:

Explanation for its shape formation! Why is the rainbow formed in semicircle shape ?

What is the reason for constant potential difference in a battery?

What is phase in electricals

What is the role of commutator in generator

A body at a height possesses: (a) kinetic energy (b) potential energy (c) solar energy (d) heat energy.

If the work done on a body at two instances i.e., at 20 s and 40 s is same, then what is the ratio of the power?

In Tyndall effect, the colour of light that is scattered depends on

A child on the skateboard is moving at the speed of 2 ms. After a force acts on him, his speed becomes 3 ms. Calculate the work done by the external force on the child. Given the weight of the child is 20 kg.

Why we use minus sign in the formula of magnification of mirror? m= -v/u

Calculate the resistivity of a wire of length 1m and 0.01cm and resistance 20ohm

How many bullets each of 5cm in diameter can be cast from a rectangular block of metal 11dm 1m5dm?

A planet of mass m and radius r is surrounded by an atmosphere of constant density. The atmosphere consists of an ideal gas of molar mass M and its thickness (radial) is h (h << r) from the surface. The temperature of the atmosphere on the surface of the planet is [R = universal gas constant]