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. What are the lines joining places of zero declination known as?

[A] Isoclinic
[B] Agonic
[C] Aclinic
[D] Isogonic

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92. Which of the following element has an isotope named as Tritium?

[A] Helium
[B] Carbon
[C] Titanium
[D] Hydrogen

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93. 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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94. 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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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 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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97. Which of the following metal foils was used in the Rutherford’s alpha particle scattering experiment?

[A] Copper
[B] Silver
[C] Gold
[D] Aluminium

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98. Which of the following diodes is mostly commonly used as a voltage regulator?

[A] LED
[B] Varactor diode
[C] Shockley diode
[D] Zener diode

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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 dopants is NOT used to increase the conductivity of a semi-conductor?

[A] Indium
[B] Aluminium
[C] Arsenic
[D] Boron

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