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Free Online Mock Physics Multiple Choice Test on Semiconductors transistors

Sub Category : Semiconductors transistors

Test : 8

Time Left :

1)	Which impurity is doped in Si to form N-type semiconductor? (1) Al (2) B (3) As (4) None of these
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2)	In a semiconductor (1) There are no free electrons at any temperature (2) The number of free electrons in more than that in a conductor (3) There are no free electrons are 0 K (4) None of these
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3)	The energy band gap is maximum in (1) Metals (2) Superconductors (3) Insulators (4) Semiconductors
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4)	If np and ne are the number of holes and electrons, then in an intrinsic semiconductors (1) np greater than ne (2) np equal to ne (3) np less than ne (4) np is not equal to ne
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5)	For non-conductors, the energy gap is (1) 6 eV (2) 1.1 eV (3) 0.8 eV (4) 0.3 eV
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