Home / Atoms and Electrons – 1 – 6

Atoms and Electrons – 1 – 6

26. The electron density in conduction band is proportional to :

(a) Donor concentration
(b) Square of donor concentration
(c) Square root of donor concentration
(d) Cube root of donor concentration

Answer
Answer : (c)

Explanation
No answer description available for this question. Let us discuss.

27. Which electron in an element is responsible for chemical & electrical properties ?

(a) Valence electrons
(b) Revolving electrons
(c) Active electrons
(d) Passive electrons

Answer
Answer : (a)

Explanation
No answer description available for this question. Let us discuss.

28. The absolute zero temperature is equal to :

(a) 0°C
(b) 273°C
(c) –273°C
(d) 27°C

Answer
Answer : (c)

Explanation
No answer description available for this question. Let us discuss.

29. …….. number of electrons is responsible for its chemical and electrical properties.

(a) 32
(b) 14
(c) 16
(d) 9

Answer
Answer : (b)

Explanation
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30. An electron in a completely filled band :

(a) Contributes to the flow of electric current
(b) Does not contributes to the flow of electric current
(c) Can move but doesn’t contribute to the flow of electric current
(d) None of these

Answer
Answer : (b)

Explanation
No answer description available for this question. Let us discuss.

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