General Science - Physics

Welcome to General Science – Physics MCQ series of GKToday. As of today February 26, 2020, this series has 590 Questions. You may purchase a PDF E-Book compilation comprising all these questions and their answers with explanation from this link.

91. Which of these are called as Universal logic gates?
[A] NAND
[B] NOR
[C] NOT
[D] Both a and b

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92. 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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93. Which of these diodes is used to detect optical signals?
[A] Photodiode
[B] Light emitting diode
[C] Photovoltaic diode
[D] None of the above

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94. Which of these diodes convert electrical energy into light?
[A] Photodiodes
[B] Light emitting diodes
[C] Photovoltaic devices
[D] None

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95. Which type of semiconductor do we get when pure silicon is doped with a group-5 element?
[A] n-type semiconductor
[B] p-type semiconductor
[C] Intrinsic semiconductor
[D] None of the above

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96. Which type of semiconductor do we get when pure silicon is doped with a group-3 element?
[A] n-type semiconductor
[B] p-type semiconductor
[C] Intrinsic semiconductor
[D] None

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97. Which of these is an acceptor impurity?
[A] Phosphorus
[B] Arsenic
[C] Antimony
[D] Indium

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98. 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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99. Which of these is known as God particle?
[A] Mesons
[B] Electrons
[C] Higgs boson
[D] Neutrinos

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100. Who invented Nuclear Reactor?
[A] James Watt
[B] Otto Hahn
[C] Michael Faraday
[D] Enrico Fermi

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