16569 + Interview Questions in Physics

1.	What are the various applications of lens?
Answer» What are the various applications of lens?

Discussion

2.	The branch that deals with the design, construction, operation and application of robots is called ___.
Answer» The branch that deals with the design, construction, operation and application of robots is called ___.

Discussion

3.	For a gas in an adiabatic process, the internal energy is given by, U=a+bPV. Here a and b are constant. P and V are pressure and volume respectively. For the gas, the ratio of C(p) and C(v) is Z. Prove that, Z=\lbrack(b+1)/b\rbrack
Answer» For a gas in an adiabatic process, the internal energy is given by, U=a+bPV. Here a and b are constant. P and V are pressure and volume respectively. For the gas, the ratio of C(p) and C(v) is Z. Prove that, Z=\lbrack(b+1)/b\rbrack

Discussion

4.	The 1st member of the balmer series of hydrogen atom has wavelength of 6562A . Calculate the wavelength and frequency of the 2nd member of the same series Given c= 310 to the power 8 m/s.
Answer» The 1st member of the balmer series of hydrogen atom has wavelength of 6562A . Calculate the wavelength and frequency of the 2nd member of the same series Given c= 310 to the power 8 m/s.

Discussion

5.	39. In an atom two electrons move around the nucleus in circular orbit of radii R and4R .The ratio of time taken by them to complete one revolution
Answer» 39. In an atom two electrons move around the nucleus in circular orbit of radii R and4R .The ratio of time taken by them to complete one revolution

Discussion

6.	27. The limiting line in balmer series Will have a frequency of-
Answer» 27. The limiting line in balmer series Will have a frequency of-

Discussion

7.	How does the narrator convey the fact that the woman looking at her reflection in the lake is deeply distressed?
Answer» How does the narrator convey the fact that the woman looking at her reflection in the lake is deeply distressed?

Discussion

8.	A 600 V DC motor drives a 60 kW at 900 rpm. The shunt field resistance is 100 Ω and the armature resistance is 0.16Ω. If the efficiency is 85% then the speed regulation of motor is _________%.3.1
Answer» A 600 V DC motor drives a 60 kW at 900 rpm. The shunt field resistance is 100 $Ω$ and the armature resistance is 0.16 $Ω$ . If the efficiency is 85% then the speed regulation of motor is _________%. 3.1

Discussion

9.	Question 2 Write uses of radioactive isotopes in the Industrial field and in medical science. Explain any three harmful effects of radioactive substances and radiation.
Answer» Question 2 Write uses of radioactive isotopes in the Industrial field and in medical science. Explain any three harmful effects of radioactive substances and radiation.

9.

Question 2 Write uses of radioactive isotopes in the Industrial field and in medical science. Explain any three harmful effects of radioactive substances and radiation.

Answer»

Question 2

Write uses of radioactive isotopes in the Industrial field and in medical science.

Explain any three harmful effects of radioactive substances and radiation.

Discussion

10.	force acting on the body passes through a hinge then torque in the body i
Answer» force acting on the body passes through a hinge then torque in the body i

Discussion

11.	When light travels in a transparent medium, the speed of light decreases by a factor of 1.5 as compared to the speed in vacuum. The refractive index of the material is-
Answer» When light travels in a transparent medium, the speed of light decreases by a factor of $1.5$ as compared to the speed in vacuum. The refractive index of the material is-

Discussion

12.	Which of the following units could be used to measure electric charge? (a) ampere (b) joule (c) volt (d) coulomb
Answer» Which of the following units could be used to measure electric charge? (a) ampere (b) joule (c) volt (d) coulomb

Discussion

13.	What is a wind energy farm? [3 MARKS]
Answer» What is a wind energy farm? [3 MARKS]

Discussion

14.	Define the term current and state its. S.I. unit.
Answer» Define the term current and state its. S.I. unit.

Discussion

15.	Why is it necessary to have an earth wire installed in a power circuit, but not in a lighting circuit ?
Answer» Why is it necessary to have an earth wire installed in a power circuit, but not in a lighting circuit ?

Discussion

16.	a ball is kicked at an angle of 45degree with the ground.to hit the terget which is 30metres away and at a height of 10 metres,what should be the initial velocity??
Answer» a ball is kicked at an angle of 45degree with the ground.to hit the terget which is 30metres away and at a height of 10 metres,what should be the initial velocity??

Discussion

17.	When light enters from medium P to medium Q, it is given that the value of sin isin r is less than 1, where i and r are the angle of incidence and refraction respectively. This means that:
Answer» When light enters from medium P to medium Q, it is given that the value of $\frac{sin i}{sin r}$ is less than 1, where i and r are the angle of incidence and refraction respectively. This means that:

Discussion

18.	The mass of Mr x is 50kg and the uncertainty in measurement is 1 kg.The mass of Mr y is 55kg and the uncertainty in measurement is 2 kg. Find the difference of their masses with correct uncertainties.
Answer» The mass of Mr x is 50kg and the uncertainty in measurement is 1 kg.The mass of Mr y is 55kg and the uncertainty in measurement is 2 kg. Find the difference of their masses with correct uncertainties.

Discussion

19.	30 bulbs are connected in series. If one bulb is fused and the remaining 29 are connected in series to the same supply ,then the light in the room will be a)decreased b)increased c)remains same This question is asked in 10th Tamilnadu board exam.
Answer» 30 bulbs are connected in series. If one bulb is fused and the remaining 29 are connected in series to the same supply ,then the light in the room will be a)decreased b)increased c)remains same This question is asked in 10th Tamilnadu board exam.

19.

30 bulbs are connected in series. If one bulb is fused and the remaining 29 are connected in series to the same supply ,then the light in the room will be a)decreased b)increased c)remains same This question is asked in 10th Tamilnadu board exam.

Answer»

30 bulbs are connected in series. If one bulb is fused and the remaining 29 are connected in series to the same supply ,then the light in the room will be

a)decreased

b)increased

c)remains same

This question is asked in 10th Tamilnadu board exam.

Discussion

20.	If absolute refractive index of a medium is 1.5, what is the speed of light in that medium?
Answer» If absolute refractive index of a medium is 1.5, what is the speed of light in that medium?

Discussion

21.	(a) How does the convex eye-lens differ from the ordinary convex lens made of glass ? (b) List, in order, the parts of the eye through which light passes to reach the retina.
Answer» (a) How does the convex eye-lens differ from the ordinary convex lens made of glass ? (b) List, in order, the parts of the eye through which light passes to reach the retina.

Discussion

22.	1 kg block performs vertical harmonic oscillations with amplitude 1.6cm and frequency 25 rad/s. The maximum value of the force that the system exerts on the surface is 11n N.Value of n is(g=10m/s^2 , pie^2=10)
Answer» 1 kg block performs vertical harmonic oscillations with amplitude 1.6cm and frequency 25 rad/s. The maximum value of the force that the system exerts on the surface is 11n N.Value of n is(g=10m/s^2 , pie^2=10)

Discussion

23.	What is meant by power of a lens? What is one dioptre?
Answer» What is meant by power of a lens? What is one dioptre?

Discussion

24.	A CONVEXLENS OF FOCAL LENGH 30 CM IS INCONTACT WITH A CONCAVE LENS OF FOCAL LENGH 40 CM.THE LENGH OF COMBINATION IS \lbrack IGNORE THE THICKNESS OF LENS
Answer» A CONVEXLENS OF FOCAL LENGH 30 CM IS INCONTACT WITH A CONCAVE LENS OF FOCAL LENGH 40 CM.THE LENGH OF COMBINATION IS \lbrack IGNORE THE THICKNESS OF LENS

Discussion

25.	an opwn U tube of uniform cross-section contains mercury.if 27.2cm of warter column is poured into one limb ,how high does mercury surface rise in the other limb from initial leve
Answer» an opwn U tube of uniform cross-section contains mercury.if 27.2cm of warter column is poured into one limb ,how high does mercury surface rise in the other limb from initial leve

Discussion

26.	Two parallel wires 1 m apart carry currents of 1 A and 3 A respectively in opposite directions. The force per unit length acting between two wires is
Answer» Two parallel wires 1 m apart carry currents of 1 A and 3 A respectively in opposite directions. The force per unit length acting between two wires is

Discussion

27.	State one important use of CNG these days.
Answer» State one important use of CNG these days.

Discussion

28.	Do radioactive elements emit radiation all the time?
Answer» Do radioactive elements emit radiation all the time?

Discussion

29.	54.The equivalent resistance between A and B in the following figure is
Answer» 54.The equivalent resistance between A and B in the following figure is

Discussion

30.	33.A solenoid of length 0.04m and radius 0.02m with 100 turns lies inside on the axis of a long solenoid,0.8m length and 1500 turns.Obtain the mutual inductance of the two solenoids.
Answer» 33.A solenoid of length 0.04m and radius 0.02m with 100 turns lies inside on the axis of a long solenoid,0.8m length and 1500 turns.Obtain the mutual inductance of the two solenoids.

Discussion

31.	Consider a conducting shell.Two point charges q1 and q2 are inside the shell and two q3 and q4 areoutside the shell. Then induced charge on the outersurface of conducting shell is :(1) (q1+ q2)(2) – (q1 + q2)(3) (q3+q4)(4)–(q3+q4)
Answer» Consider a conducting shell. Two point charges q1 and q2 are inside the shell and two q3 and q4 are outside the shell. Then induced charge on the outer surface of conducting shell is : (1) (q1+ q2) (2) – (q1 + q2) (3) (q3+q4) (4)–(q3+q4)

Discussion

32.	It is known that light from a distant star takes 10 years to reach the Earth. How far is this star situated from the Earth? a) 9.467 × 1016 km b) 9.467 × 1016 m c) 10 light years
Answer» It is known that light from a distant star takes 10 years to reach the Earth. How far is this star situated from the Earth? a) 9.467 $\times$ $10^{16}$ km b) 9.467 $\times$ $10^{16}$ m c) 10 light years

32.

It is known that light from a distant star takes 10 years to reach the Earth. How far is this star situated from the Earth? a) 9.467 × 1016 km b) 9.467 × 1016 m c) 10 light years

Answer»

It is known that light from a distant star takes 10 years to reach the Earth. How far is this star situated from the Earth?

a) 9.467 $\times$ $10^{16}$ km

b) 9.467 $\times$ $10^{16}$ m

c) 10 light years

Discussion

33.	what is the labelled diagram of eye
Answer» what is the labelled diagram of eye

Discussion

34.	A and B are two concentric circular conductors of centre O and carrying current I1 and I2 as shown in the figure.B1 and B2 are magnitudes of magnetic field due to A and B respectively. The net magnetic field at point O is
Answer» A and B are two concentric circular conductors of centre O and carrying current $I_{1} a n d I_{2}$ as shown in the figure. $B_{1} a n d B_{2}$ are magnitudes of magnetic field due to A and B respectively. The net magnetic field at point O is

Discussion

35.	The direction of the magnetic field at a point P above the wire carrying current as shown in the figure is
Answer» The direction of the magnetic field at a point P above the wire carrying current as shown in the figure is

35.

The direction of the magnetic field at a point P above the wire carrying current as shown in the figure is

Answer»

The direction of the magnetic field at a point P above the wire carrying current as shown in the figure is

Discussion

36.	A ray of light takes 10-9 second to cross a glass slab of refractive index 1.5. The thickness of the slab willbe(1) 01 m3) 03 m(2) 0.2 m(4) 0.4 m
Answer» A ray of light takes 10-9 second to cross a glass slab of refractive index 1.5. The thickness of the slab willbe(1) 01 m3) 03 m(2) 0.2 m(4) 0.4 m

Discussion

37.	If an increase in the length of copper wire is 25% due to stretching, the percentage increase in its resistance will be:
Answer» If an increase in the length of copper wire is 25% due to stretching, the percentage increase in its resistance will be:

37.

If an increase in the length of copper wire is 25% due to stretching, the percentage increase in its resistance will be:

Answer»

If an increase in the length of copper wire is 25% due to stretching, the percentage increase in its resistance will be:

Discussion

38.	The equivalent resistance between A and B is:
Answer» The equivalent resistance between A and B is:

38.

The equivalent resistance between A and B is:

Answer»

The equivalent resistance between A and B is:

Discussion

39.	Explain relationship Between momentum mass and velocity
Answer» Explain relationship Between momentum mass and velocity

Discussion

40.	Can elotromagnetic waves can be used to.charge battery
Answer» Can elotromagnetic waves can be used to.charge battery

Discussion

41.	What is the duration of 9192631770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133atom?
Answer» What is the duration of 9192631770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133atom?

Discussion

42.	Two converging lenses of the same focal length f are separated by a distance 2f. The axis of the second lens is inclined at angle θ=60∘ with respect to the axis of the first lens. A parallel paraxial beam of light is incident from left side of the lens. Find the x−coordinates of the final image with respect to the centre of the first lens taken as origin.
Answer» Two converging lenses of the same focal length $f$ are separated by a distance $2 f$ . The axis of the second lens is inclined at angle $θ = 60^{\circ}$ with respect to the axis of the first lens. A parallel paraxial beam of light is incident from left side of the lens. Find the $x -$ coordinates of the final image with respect to the centre of the first lens taken as origin.

Discussion

43.	15.Latent heat of ice is 80 calorie per gram what will be its value in s i system
Answer» 15.Latent heat of ice is 80 calorie per gram what will be its value in s i system

Discussion

44.	Why clouds are white because it should disperse the white light coming from the sun.please explain in details
Answer» Why clouds are white because it should disperse the white light coming from the sun.please explain in details

Discussion

45.	Peggy feels that returning to earth is not a pleasant experience as ________________
Answer» Peggy feels that returning to earth is not a pleasant experience as ________________

Discussion

46.	Alex of mass 40 kg is standing at a cliff of height 15 m while his friend Sam of mass 50 kg is standing at another cliff of height 7 m. Who among them has greater potential energy?Take g = 10 ms−2.
Answer» Alex of mass 40 kg is standing at a cliff of height 15 m while his friend Sam of mass 50 kg is standing at another cliff of height 7 m. Who among them has greater potential energy? Take g = 10 ms $^{- 2}$ .

Discussion

47.	Draw a figure describing the following.The reflecting surface of two mirrors make an angle of 90∘ with each other. If a ray incident of one mirror has an angle of incidents of 30∘, draw the ray reflected from the second mirror. What will be its angle of reflection?
Answer» Draw a figure describing the following. The reflecting surface of two mirrors make an angle of 90^∘ with each other. If a ray incident of one mirror has an angle of incidents of 30^∘, draw the ray reflected from the second mirror. What will be its angle of reflection?

Discussion

48.

Use the data in Table 12.2 to answer the following −Table 12.2 Electrical resistivity of some substances at 20°C − Material Resistivity (Ω m) Conductors Silver 1.60 × 10−8 Copper 1.62 × 10−8 Aluminium 2.63 × 10−8 Tungsten 5.20 × 10−8 Nickel 6.84 × 10−8 Iron 10.0 × 10−8 Chromium 12.9 × 10−8 Mercury 94.0 × 10−8 Manganese 1.84 × 10−6 Constantan (alloy of Cu and Ni) 49 × 10−6 Alloys Manganin (alloy of Cu, Mn and Ni) 44 × 10−6 Nichrome (alloy of Ni, Cr, Mn and Fe) 100 × 10−6 Glass 1010 − 1014 Insulators Hard rubber 1013 − 1016 Ebonite 1015 − 1017 Diamond 1012 − 1013 Paper (dry) 1012 (a) Which among iron and mercury is a better conductor?(b) Which material is the best conductor?

Answer»

Use the data in Table 12.2 to answer the following −

Table 12.2 Electrical resistivity of some substances at 20°C

−	Material	Resistivity (Ω m)
Conductors	Silver	1.60 × 10⁻⁸
	Copper	1.62 × 10⁻⁸
	Aluminium	2.63 × 10⁻⁸
	Tungsten	5.20 × 10⁻⁸
	Nickel	6.84 × 10⁻⁸
	Iron	10.0 × 10⁻⁸
	Chromium	12.9 × 10⁻⁸
	Mercury	94.0 × 10⁻⁸
	Manganese	1.84 × 10⁻⁶
	Constantan (alloy of Cu and Ni)	49 × 10⁻⁶
Alloys	Manganin (alloy of Cu, Mn and Ni)	44 × 10⁻⁶
	Nichrome (alloy of Ni, Cr, Mn and Fe)	100 × 10⁻⁶
	Glass	10¹⁰ − 10¹⁴
Insulators	Hard rubber	10¹³ − 10¹⁶
	Ebonite	10¹⁵ − 10¹⁷
	Diamond	10¹² − 10¹³
	Paper (dry)	10¹²

(a) Which among iron and mercury is a better conductor?

(b) Which material is the best conductor?

Discussion

49.	Name the component of eye that is responsible for the adjustment of eyelens?
Answer» Name the component of eye that is responsible for the adjustment of eyelens?

Discussion

50.	What kind of mirror, concave, convex or plane, would be best suited for use in a solar cooker? Why?
Answer» What kind of mirror, concave, convex or plane, would be best suited for use in a solar cooker? Why?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What are the various applications of lens?

The branch that deals with the design, construction, operation and application of robots is called ___.

For a gas in an adiabatic process, the internal energy is given by, U=a+bPV. Here a and b are constant. P and V are pressure and volume respectively. For the gas, the ratio of C(p) and C(v) is Z. Prove that, Z=\lbrack(b+1)/b\rbrack

The 1st member of the balmer series of hydrogen atom has wavelength of 6562A . Calculate the wavelength and frequency of the 2nd member of the same series Given c= 310 to the power 8 m/s.

39. In an atom two electrons move around the nucleus in circular orbit of radii R and4R .The ratio of time taken by them to complete one revolution

27. The limiting line in balmer series Will have a frequency of-

How does the narrator convey the fact that the woman looking at her reflection in the lake is deeply distressed?

A 600 V DC motor drives a 60 kW at 900 rpm. The shunt field resistance is 100 Ω and the armature resistance is 0.16Ω. If the efficiency is 85% then the speed regulation of motor is _________%.3.1

Question 2 Write uses of radioactive isotopes in the Industrial field and in medical science. Explain any three harmful effects of radioactive substances and radiation.

force acting on the body passes through a hinge then torque in the body i

When light travels in a transparent medium, the speed of light decreases by a factor of 1.5 as compared to the speed in vacuum. The refractive index of the material is-

Which of the following units could be used to measure electric charge? (a) ampere (b) joule (c) volt (d) coulomb

What is a wind energy farm? [3 MARKS]

Define the term current and state its. S.I. unit.

Why is it necessary to have an earth wire installed in a power circuit, but not in a lighting circuit ?

a ball is kicked at an angle of 45degree with the ground.to hit the terget which is 30metres away and at a height of 10 metres,what should be the initial velocity??

When light enters from medium P to medium Q, it is given that the value of sin isin r is less than 1, where i and r are the angle of incidence and refraction respectively. This means that:

The mass of Mr x is 50kg and the uncertainty in measurement is 1 kg.The mass of Mr y is 55kg and the uncertainty in measurement is 2 kg. Find the difference of their masses with correct uncertainties.

30 bulbs are connected in series. If one bulb is fused and the remaining 29 are connected in series to the same supply ,then the light in the room will be a)decreased b)increased c)remains same This question is asked in 10th Tamilnadu board exam.

If absolute refractive index of a medium is 1.5, what is the speed of light in that medium?

(a) How does the convex eye-lens differ from the ordinary convex lens made of glass ? (b) List, in order, the parts of the eye through which light passes to reach the retina.

1 kg block performs vertical harmonic oscillations with amplitude 1.6cm and frequency 25 rad/s. The maximum value of the force that the system exerts on the surface is 11n N.Value of n is(g=10m/s^2 , pie^2=10)

What is meant by power of a lens? What is one dioptre?

A CONVEXLENS OF FOCAL LENGH 30 CM IS INCONTACT WITH A CONCAVE LENS OF FOCAL LENGH 40 CM.THE LENGH OF COMBINATION IS \lbrack IGNORE THE THICKNESS OF LENS

an opwn U tube of uniform cross-section contains mercury.if 27.2cm of warter column is poured into one limb ,how high does mercury surface rise in the other limb from initial leve

Two parallel wires 1 m apart carry currents of 1 A and 3 A respectively in opposite directions. The force per unit length acting between two wires is

State one important use of CNG these days.

Do radioactive elements emit radiation all the time?

54.The equivalent resistance between A and B in the following figure is

33.A solenoid of length 0.04m and radius 0.02m with 100 turns lies inside on the axis of a long solenoid,0.8m length and 1500 turns.Obtain the mutual inductance of the two solenoids.

Consider a conducting shell.Two point charges q1 and q2 are inside the shell and two q3 and q4 areoutside the shell. Then induced charge on the outersurface of conducting shell is :(1) (q1+ q2)(2) – (q1 + q2)(3) (q3+q4)(4)–(q3+q4)

It is known that light from a distant star takes 10 years to reach the Earth. How far is this star situated from the Earth? a) 9.467 × 1016 km b) 9.467 × 1016​ m c) 10 light years

what is the labelled diagram of eye

A and B are two concentric circular conductors of centre O and carrying current I1 and I2 as shown in the figure.B1 and B2 are magnitudes of magnetic field due to A and B respectively. The net magnetic field at point O is

The direction of the magnetic field at a point P above the wire carrying current as shown in the figure is

A ray of light takes 10-9 second to cross a glass slab of refractive index 1.5. The thickness of the slab willbe(1) 01 m3) 03 m(2) 0.2 m(4) 0.4 m

If an increase in the length of copper wire is 25% due to stretching, the percentage increase in its resistance will be:

The equivalent resistance between A and B is:

Explain relationship Between momentum mass and velocity

Can elotromagnetic waves can be used to.charge battery

What is the duration of 9192631770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133atom?

15.Latent heat of ice is 80 calorie per gram what will be its value in s i system

Why clouds are white because it should disperse the white light coming from the sun.please explain in details

Peggy feels that returning to earth is not a pleasant experience as ________________

Alex of mass 40 kg is standing at a cliff of height 15 m while his friend Sam of mass 50 kg is standing at another cliff of height 7 m. Who among them has greater potential energy?Take g = 10 ms−2.

Draw a figure describing the following.The reflecting surface of two mirrors make an angle of 90∘ with each other. If a ray incident of one mirror has an angle of incidents of 30∘, draw the ray reflected from the second mirror. What will be its angle of reflection?

Name the component of eye that is responsible for the adjustment of eyelens?

What kind of mirror, concave, convex or plane, would be best suited for use in a solar cooker? Why?

It is known that light from a distant star takes 10 years to reach the Earth. How far is this star situated from the Earth? a) 9.467 × 1016 km b) 9.467 × 1016 m c) 10 light years