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.

91. Which of these is used to accelerate charged particles or ions to high energies?

[A] Solenoid
[B] Cyclotron
[C] Electric motor
[D] Toroid

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92. 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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93. What do we call the phenomenon of spontaneous disintegration of the nucleus of an atom?

[A] Nuclear Fusion
[B] Ionisation
[C] Radioactivity
[D] Covalent Bonding

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94. Which of the following is correct?

[A] 1 rutherford (Rd) = 103 decays/second
[B] 1 rutherford (Rd) = 104 decays/second
[C] 1 rutherford (Rd) = 105 decays/second
[D] 1 rutherford (Rd) = 106 decays/second

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95. 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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96. Which of the following is a commonly used moderator in a Nuclear reactor?

[A] Heavy water
[B] Graphite
[C] Water
[D] All of the above

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97. When is a p-n diode said to be forward biased?

[A] when p-side is connected to the positive terminal of the battery
[B] when n-side is connected to the positive terminal of the battery
[C] when p-side is connected to the negative terminal of the battery
[D] None of the above

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98. Which of these are called as Universal logic gates?

[A] NAND
[B] NOR
[C] NOT
[D] Both a and b

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99. What is the output of an AND gate when both the inputs are 0?

[A] 0
[B] 1
[C] Either 0 or 1
[D] 2

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100. 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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