QUESTION1:
A semiconductor is formed by ……… bonds.
ANS:Covalent
QUESTION2:
A semiconductor has ………… temperature coefficient of resistance.
ANS:Negative
QUESTION3:
A semiconductor has generally ……………… valence electrons.
ANS:4
QUESTION4:
When a pure semiconductor is heated, its resistance
ANS: Goes down
QUESTION5:
When a pure semiconductor is heated, its resistance
ANS: Free electrons
QUESTION6:
A hole in a semiconductor is defined as
ANS:The incomplete part of an electron pair bond
QUESTION7:
As the doping to a pure semiconductor increases, the bulk resistance of the semiconductor
ANS:Decreases
QUESTION8:
In a semiconductor, current conduction is due to
ANS:Holes and free electrons
QUESTION9:
The random motion of holes and free electrons due to thermal agitation is called
ANS:Diffusion
QUESTION10:
A forward biased pn junction diode has a resistance of the order of
ANS:Ω
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physics 12th cbse mcq