General Science - Physics MCQs

Physics Objective (Multiple Choice) General Knowledge & General Science Questions & Answers for SSC-CGL, UPPSC, UPSC, NDA, CDS and UPSC Civil Services Prelims Examinations.

41. Which of the following is true about a cyclic process?

[A] the total heat absorbed equals the work done by the system.
[B] the system returns to its initial state
[C] Both a and b
[D] None

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42. What is the eye defect when a person can see nearby objects clearly but cannot see distant objects distinctly known as?

[A] Cataract
[B] Myopia
[C] Hypermetropia
[D] Presbyopia

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43. How can a moving coil galvanometer be converted into a voltmeter?

[A] by introducing shunt resistance in parallel
[B] by introducing shunt resistance in series
[C] by introducing large resistance in series
[D] None of the above

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44. Which of the following is correct?

[A] Soft iron is a hard ferromagnetic material
[B] Alnico is a soft ferromagnetic material
[C] At high enough temperature, a ferromagnet becomes a paramagnet
[D] All of the above

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45. Which of the following is the name given to electrons moving at high speed?

[A] Alpha particles
[B] Beta particles
[C] Gamma particles
[D] None

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46. What is the energy equivalence of one atomic mass unit?

[A] 93.125 eV
[B] 931.25 eV
[C] 9.31 eV
[D] 0.93125 eV

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47. What is meant by Atomic number of an atom?

[A] total number of protons
[B] total number of electrons in an uncharged atom
[C] Both a and b
[D] None

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48. What is the barrier potential for Germanium?

[A] 0.3 V
[B] 0.7 V
[C] 1 V
[D] 1.7 V

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49. Which of these is used as a material for making semiconductor devices?

[A] Silicon
[B] Germanium
[C] Gallium Arsenide
[D] All of the above

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50. Which of the following is correct about conductors?

[A] The conduction band and the valence band partly overlap each other
[B] There is no forbidden energy band gap between conduction band and the valence band
[C] Both a and b
[D] None of the above

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