TRB Model Questions for Physics

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TRB Model Questions for Physics


1. The unit of electric current is

A. moleB. voltC. candelaD. ampere

2. Which is the fundamental quantity among the following?

A. areaB. massC. densityD. speed

3. The unit for frequency is

A. hertzB. metreC. kelvinD. second

4. The unit of temperature is

A. CalorieB. FahrenheitC. KelvinD. Celsius

5. Sound cannot travel through

A. vacuumB. liquidsC. solidsD. gases

6. Lightning conductor was first constructed by

A. NewtonB. EdisonC. VoltaD. Franklin

7. The unit of thrust is

A. jouleB. pascalC. newtonD. kg m3

8. The unit for quantity of substance is

A. moleB. kilogramC. gramD. metre3

9. In the solar system, the planet farthest to the Sun is

A. UranusB. PlutoC. EarthD. Mercuty

10. There is no neutron in the nucleus of the atom of

A. carbonB. nitrogenC. oxygenD. hydrogen

11. Barometers are used to measure the atmospheric

A. gasesB. capacityC. pressureD. density

12. Heat is measured in terms of

A. gramB. degreeC. cmD. calorie

13. The nearest star to the Earth is

A. Pole starB. Morning starC. The SunD. Orion

14. Unit of heat energy is

A. degreeB. metreC. jouleD. kilogram

15. Boiling point of water is

A. 0°CB. -39°CC. 100°CD. 357°C

16. Which of the following is used in match indusrty?

A. sodium chlorideB. sodium carbonateC. potassium chlorateD. sodium bicarbonate

17. Normal temperature of human body is

A. 37°CB. 37 KC. 90 KD. 100°C

18. An substance for sublimating substance is

A. sulphurB. camphorC. copper sulphateD. sodium chloride

19. The conversation of a vapour gas into a liquid by cooling is known as

A. meltingB. condensationC. freezingD. evaporation

20. The molecular weight of water is

A. 18B. 19C. 21D. 24

21. The region covered by water is known as

A. hydrosphereB. atmosphereC. ionosphereD. none of these

22. The time taken for one oscillation is called

A. massB. secondC. minuteD. period oscillation

23. The S.I. unit of time is

A. hourB. secondC. minuteD. day

24. The material which do not conduct electric charges is

A. copperB. silverC. micaD. graphite

25. A neutron is a ----- particle.

A. positively chargedB. negatively chargedC. neutralD. positively and negatively charged

26. Who discovered x–ray?

A. EinsteinB. J.J.ThomsonC. RoentgenD. Madam Curie

27. X–rays cannot pass through

A. boneB. woodC. fleshD. glass

28. Television was discovered by

A. BohrB. BecquerrelC. J.L.BairdD. Bhaba

29. Mechanical energy is converted into electrical energy in a

A. motorB. generatorC. loud speakerD. microphone

30. Electrolytes are usually in the form of

A. gasesB. plasmaC. liquidsD. gases


31. Which one of the following is an insulator?

A. silverB. glassC. copperD. aluminium

32. The periscope is used in

A. shipB. aerospaceC. aeroshipD. submarine

33. The fuse wire is made of

A. tungstenB. copperC. lead–tin alloyD. nichrome

34. Wave theory was proposed by

A. YoungB. NewtonC. HuygenD. Raman

35. The unit of power of a lens is

A. pascalB. decibelC. stokeD. Diopter

36. The unit of power of the lens is

A. metreB. kilometreC. dioptreD. angstrom

37. Kepler’s first law of planetary motion is also called

A. law of periodsB. law of areasC. law of orbitsD. law of distances

38. The air resistance on freely falling body depends upon

A. shapeB. densityC. frictionD. pressure

39. The smallest planet in the solar system is

A. EarthB. MarsC. PlutoD. Mercury

40. The splitting of different colours in a prism is called

A. diffractionB. dispersionC. polarisationD. interference

41. Laser is a device to produce

A. micro wavesB. x–raysC. magnetic wavesD. coherent waves

42. The conversion of a solid into a liquid on heating is called

A. meltingB. evaporationC. evaporationD. condensation

43. The maximum displacement of the bob from the mean position is called

A. velocityB. amplitudeC. period of oscillationD. length of the pendulum

44. The mass per unit volume of a substance is called

A. areaB. forceC. densityD. volume

45. Carbon dioxide turns lime water

A. blueB. greenC. redD. milky

46. Atom is

A. negatively chargedB. positively chargedC. neutralD. none of the above

47. Fortin’s barometer is used to measure the atmospheric

A. densityB. pressureC. temperatureD. relatively density

48. Transfer of heat by molecular collision is

A. conductionB. convectionC. radiationD. collimation

49. The instrument used to test the purify of milk is

A. polarimeter B. galvanometer C. calorimeterD. lactometer

50. Which metal is commonly used for making an electromagnet?

A. copper B. cobalt C. ironD. nickel


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