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Unfortunately, Mr. M. Subramanian, who maintained this website lost his battle to cancer and passed away in July, 2019. The database has over 50,000 questions. If you are interested in purchasing the website/database, please reach out using the form here.

Q1. What is the unit of stress?

Nm–1

Nm–2

Nm2

Q2. What is the unit of stress?

Nm–1

Nm–2

Nm2

Q3. What is the unit of refractive index.

ms–1

No unit

Dioptre.

Q4. What is the unit of G (gravitational constant)?

Nm2

ms–2

Nm2 kg–2

Nm–2 kg–2

Q5. What is the unit of mechanical force?

Nm–1

Nm2

Q6. What is the unit of electric current?

Farad

Ohm

Coulomb

Ampere

Q7. What is the unit of force?

Joule

Newton

Coulomb

Kgms–1

Q8. What is the unit of coefficient

NS m2

NS m–1

NS2 m–2

NS m–2

Q9. What is the unit of coefficient of viscosity?

Ns–1 m

Ns–2 m

Nsm–2

Nsm–1

Q10. What is the unit of angular displacement?

rad S–1

rad S–2

rad–1

radian

Q11. What is the turns ratio in a step-up transformer?

> 1

< 1

none.

Q12. What is the unit of Activity?

Roentgen

Decibel

Curie

Becqueral

Q13. What is the total power generation capacity of India?

7270 MW

7720 MW

2077 MW

2770 MW

Q14. What is the time period of communication satellite?

24 hours

365 hours

60 hours

36 hours.

Q15. What is the thickness of the concrete wall used in a nuclear reactor?

2.25 to 2.5 m

2 - 2.5 m

2 - 2.25 m

2 - 3 m

Q16. What is the temperature needed to operate ocean thermal conservation plant?

10 degree – 15 degreeC

20 degreeC and more

15 degree – 20 degreeC

20 degreeC.

Q17. What is the speed of light in a glass when the light enters from air to glass (M = 1.5)

2 × 108 m/s

3 × 108 m/s

2.1 × 108 m/s

2.5 × 108 m/s

Q18. What is the size of the image formed by concave lens?

Always smaller than the size of the object

Always greater than the size of the object

Same as the size of the object

It depends on the position of the object.

Q19. What is the size of the image formed by an object placed at the focus of a convex lens?

Diminished

Enlarged

Extremely diminished

Highly enlarged

Q20. What is the simplest way of maintaining a potential difference between the two ends of a conductor?

To connect it to a battery or dry cell

To bring the two ends of conductor near each other

To make the two ends away from each other

None of the above.

Q21. What is the SI unit of power of lens?

Meter

Dioptre

Micrometer

Q22. What is the SI unit of Specific resistance

ohm

mho

ohm.m

mho.m–1

Q23. What is the SI unit of current?

Ampere

Coulomb

Ohm

Volt.

Q24. What is the SI unit of magnetic flux?

Tesla

Wbm–1

Wbm–2

Q25. What is the shortest distance between two points on a plane?

Straight line

Circle

Ellipse

All of the above

Q26. What is the shape of our galaxy?

Elliptical

Spiral

Irregular

None of the above.

Q27. What is the relation between linear velocity and angular velocity?

v = rw

w = vr

v = r/w

w/r

Q28. What is the S.I unit of gravitational constant?

Nm2/kg

Nm2/kg2

N2m/kg

N2M2/kg2

Q29. What is the refractive index of the material having the frequency of light wave 3 × 1014 Hz and its wavelength 6400 A?

1.4

1.33

1.56

1.5

Q30. What is the reciprocal of specific resistance?

Resistivity

Conductance

Resistance

Conductivity

Q31. What is the ratio of the resultant resistance, when ‘n’ identical resistors of resistance ‘R’ are connected in parallel first and then in series?

1 : n2

1:1

n2: 1

n : 1

Q32. What is the range of velocity of a .particle?

3 × 107 m/s –15 × 107 m/s

2 × 108 m/s –15 × 107 m/s

4 × 107 m/s –15 × 107 m/s

4 × 107 m/s –15 × 100.6 m/s

Q33. What is the range of maximum temperature that can be reached inside a solar cooker?

150 degree to 170 degree C

100 degree – 140 degree C

90 degree – 100 degree C

75 degree – 85 degree C

Q34. What is the radius of the nucleus?

10–14 m

10–10 m

109 m

10–7 m

Q35. What is the range of intermolecular force of attraction?

10–3 m

10–5 m

10–9 m

10–4 m

Q36. What is the radius of an atom?

10–14 m

10–12m

10–10 m

10–15 m

Q37. What is the radius of curvature and name of a spherical mirror whose focal length is +2 cm?

+ 4, cm, convex

– 4 cm, concave

+ 4 cm concave

Q38. What is the radius of curvature of the mirror having 20 cm of focal length?

30 cm

40 cm

15 cm

20 cm

Q39. What is the principle used in multiple reflections?

Telescope

Microscope

Kaleidoscope

Bioscope

Q40. What is the principle used in microphone?

Electromagnetic induction

Mechanical effect of current

Photo electric emission

Electronic induction.

Q41. What is the principle used in galvanometer?

Electromagnetic induction

Magnetic effect of electric current

Mechanical effect of current

Heating effect of current.

Q42. What is the power of an electric lamp, if it draws 20 A current when connected to 220V line? (P = VI)

4400 W

440 W

2200 W

4200 W

Q43. What is the power of a lens?

1/f

1/R

1/u

1/ s

Q44. What is the power of a concave lens having focal length of 20 cm?

– 6.5 D

– 5.00 D

– 0.50 D

– 6.6 D

Q45. What is the position of the image, when the object is placed at c for a concave mirror?

At c

At infinity

Behind the mirror

Between Rand C

Q46. What is the position of the image when an object is placed at infinity in front of a concave lens?

Principal focus on the same side

Between optic centre and focus

Principal focus on the other side

None of the above.

Q47. What is the path taken by light?

Curve

Circular

Zigzag

Straight

Q48. What is the phase difference between electric and magnetic field in an EM wave?

p/2

p/4

Zero.

Q49. What is the other name of Thomson’s atom model?

Planetary model

Liquid drop

Plum-pudding

Ideal model

Q50. What is the other name of Fleming’s left hand rule?

Generator rule

Motor rule

Slates rule

Ampere rule.

Answers Evaluate

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