ECAT Physics Chapter 18 Electronics Online Test With Answers

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ECAT Physics Chapter 18 Electronics Online Test

Sr. # Questions Answers Choice
1 In an N-type silicon, which of the following statement is true Electrons are majority carriers and trivalent atoms are the dopants Electrons are minority carriers and pentavalent atoms are the dopants Holes are minority carriers and pentavalent atoms are the dopants Holes are majority carriers and trivalent atoms are the dopants
2 The values 1 and 0 are designated as: Continuous values Binary values Boolean values Decimal values Either (B) and (C)
3 The value of LDR depends upon intensity of: Sound falling on it Current passing through it Magnetic field surrounding it Light falling on it Non of these
4 In describing function of digital systems, 1 represents: Closed switch True Statement Lighted bulb Only (B) and (C) All are true
5 Inverter is the name given to: NOT gate OR gate NOR gate AND gate XOR gate
6 An LED emits light when it is: Forward biased Reverse biased Operated without battery Operated with heat source None of these
7 .Depletion region contains: Protons Positive ions Negative ions Both (B) and (C) Both (A) and (C)
8 A potential barrier of 0.7V exists across p-n junction made from: Germanium Silicon Arsenic Gallium Indium
9 Depletion region contains: Protons Positive ions Negative ions Both (B) and (C) Both (A) and (C)
10 Computer chips are made from: Iron Silicon Helium Stontium Aluminium
11 Whenever a covalent bond breaks, it creates: An electron A hole An electron-hole pair A positron All of these
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