Entry Test MCQ :: Electronics

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Electrons present in p-type material due to thermal pair generation are

A.	majority carriers	B.	minority carriers
C.	dual carriers	D.	blockers

Semi-conductors with donor atoms and free electrons belong to the type

A.	n	B.	p
C.	mix	D.	any of above

Semi-conductor germanium and silicon are

A.	pentavalent	B.	trivalent
C.	divalent	D.	tetravalent

Acceptor and donor impurities donate

A.	n-carriers only	B.	p-carriers only
C.	p-carriers and n-carriers respectively	D.	n-carriers and p-carriers respectively

p-n junction when reversed biased acts as a

A.	capacitor	B.	inductor
C.	on switch	D.	off switch

In p-n-p transistor the collector current is

A.	equal to emitter current	B.	slightly less than emitter current
C.	greater than emitter current	D.	any of above

In n-p-n transistor, p works as

A.	collector	B.	emitter
C.	base	D.	any of above

The simplest type of rectification known as half wave rectification is obtained by

A.	using a transistor	B.	suppressing the harmonics in A.C voltage
C.	suppressing half wave of A.C supply by using diode	D.	using a Coolidge tube

Identify the correct statement about minority carriers

A.	holes in n-type and free electrons in p-type	B.	holes in n-type and p-type
C.	free electrons in n-type and holes in p-type	D.	free electrons in n-type and p-type

10.

Depletion region of a junction is formed

A.	during the manufacturing process	B.	under forward bias
C.	under reverse bias	D.	when temperature varies