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.

51. What is the distance between the focus and the pole of the mirror is known as?

[A] Centre of Curvature
[B] Focal length
[C] Mirror number
[D] Radius of curvature

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52. What is the total charge of the electric dipole?

[A] 0
[B] -1
[C] +1
[D] None of the above

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53. What is the equivalent EMF of a series combination of n cells?

[A] the arithmetic mean of their EMFs
[B] the product of their individual EMF
[C] the sum of their individual EMF
[D] None of the above

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54. Which of these are electrochemical cells?

[A] Galvanic cells
[B] Electrolytic cells
[C] Both a and b
[D] None of the above

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55. What do we call an arrangement of two unlike poles of equal strength separated by a small distance?

[A] Magnetic dipole
[B] Solenoid
[C] Toroid
[D] Electric dipole

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56. What is the source of energy in nuclear reactors which produce electricity?

[A] Nuclear Fission
[B] Nuclear Fusion
[C] Gamma decay
[D] None of the above

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57. What do we call the energy which should be supplied to the nucleus to break it up into its constituent particles?

[A] Excitation energy
[B] Binding energy
[C] Ionisation energy
[D] None of the above

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58. Which of the following material is commonly used to make control rods in a nuclear reactor?

[A] Indium
[B] Boron
[C] Cadmium
[D] All of the above

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59. How does a semiconductor behave at absolute zero temperature?

[A] like an insulator
[B] like a conductor
[C] depends on the material
[D] None of the above

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