⚡Electrical Engineering MCQs
Electrical Engineering MCQs
499 MCQs141
When the temperature of an extrinsic semiconductor is increased, the pronounced effect is on_________________?
AJunction capacitance
BMinority carriers
CMajority carriers
DNone of the above
142
The leakage current in a pn junction is of the order of________________?
AAa
BmA
CkA
DµA
143
The leakage current across a pn junction is due to________________?
AMinority carriers
BMajority carriers
CJunction capacitance
DNone of the above
144
With forward bias to a pn junction , the width of depletion layer__________________?
ADecreases
BIncreases
CRemains the same
DNone of the above
145
An n-type semiconductor is______________?
APositively charged
BNegatively charged
CElectrically neutral
DNone of the above
146
Addition of pentavalent impurity to a semiconductor creates many________________?
AFree electrons
BHoles
CValence electrons
DBound electrons
147
When a pure semiconductor is heated, its resistance_________________?
AGoes up
BGoes down
CRemains the same
DCan’t say
148
A semiconductor has generally_______________valence electrons?
A2
B3
C6
D4
149
A semiconductor has ______________ temperature coefficient of resistance?
APositive
BZero
CNegative
DNone of the above
150
Belted slip ring induction motor is almost invariably used for_________________?
Awater pumps
Bjaw crushers
Ccentrifugal blowers
Dnone of the above