Semiconductor Physics – Exercise – 1

16. Electron pair bonding occurs when atoms:

(a) lack electrons
(b) share holes
(c) lack holes
(d) share electrons

Answer
Answer : (d)
Explanation
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17. If conductance increases as temperature increases, this is known as a:

(a) positive coefficient
(b) negative current flow
(c) negative coefficient
(d) positive resistance

Answer
Answer : (c)
Explanation
Explanation : A negative temperature coefficient (NTC) occurs when the thermal conductivity of a material rises with increasing temperature, typically in a defined temperature range. Note: The reciprocal of electrical Resistance is called Conductance. Let us discuss.
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18. Minority carriers are many times activated by:

(a) heat
(b) pressure
(c) dopants
(d) forward bias

Answer
Answer : (a)
Explanation
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19. A commonly used pentavalent material is:

(a) arsenic
(b) boron
(c) gallium
(d) neon

Answer
Answer : (a)
Explanation
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20. In “n” type material, majority carriers would be:

(a) holes
(b) dopants
(c) slower
(d) electrons

Answer
Answer : (d)
Explanation
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