Physics ICS Part 2 Online MCQ's Test With Answers

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Physics ICS Part 2 Online MCQ's Test

Sr. # Questions Answers Choice
1 A transistor has: Two regions Three regions Single regions Four regions
2 Transistor was invented by: Bardeen Micheal faraday Lenz Newton
3 Photodiode is used for: Detection of current Detection of heat Detection of light Both a & b
4 In case of reverse biasing, current is flown due to: Minority charge carriers Majority charge carriers Electrons Protons
5 The p-n junction in which p side is connected to+ive and n-side is -ve the junction is said to be: Neutral Forward biased Reversed biased None of above
6 The P.D develop in case of germanium is: 0.3 0.7 0.5 0.9
7 The P.D develop in case of silicon is: 0.7V 0.3V 0.5V 0.9V
8 The chargeless region after formation of Pn junction is called: Free region Depletion region Field region U.V region
9 Recently superconductor discovered is at temperature. 110K 143K 16.3K 119K
10 The first superconductor was discovered in: 1831 1911 1921 1876
11 Those materials whose resistivity becomes zero at certain temperature is called: Semiconductor Super conductor  Conductor Insulator
12 Insulators have: An empty conduction band Al full valence band A large energy gap All of above
13 A semiconductor in its extremely pure form is known as: Intrinsic Extrinsic Both a and b None of above
14 The temperature at which, semiconductor behaves as insulators: 10k 0k 237k None of above
15 Energy band theory is based upon Hund's Rule Heisenberg uncertainty principle Bohr's atomic Model Wave mechanical model
16 Semiconductors have conductivity of order: 10<sup>-8</sup> to 10<sup>-6</sup> (Ωm)<sup>-1</sup> 10<sup>-6</sup> to 10<sup>-4</sup> (Ωm)<sup>-1</sup> 10<sup>2</sup> to 10<sup>5</sup> (Ωm)<sup>-1</sup> 10<sup>-5</sup> to 10<sup>-7</sup> (Ωm)<sup>-1</sup>
17 Conductors have conductivities of order: 10<sup>3</sup>(Ωm)-1 10<sup>7</sup>(Ωm)<sup>-1</sup> 10<sup>7</sup>Ωm<sup>-1</sup> 10<sup>-6</sup>Ω
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