WorksheetsElectronics 1 Review
Total questions: 15
Worksheet time: 5mins
At room temperature, the current in an intrinsic semiconductor is due to
holes
electrons
ions
holes and electrons
What is the most commonly used semiconductor material is
silicon
germanium
mixture of silicon and germanium
GaAs
A p-n junction has high resistance in the reverse direction.
True
False
When a reverse bias is applied to p-n junction, the width of depletion layer increases.
True
False
A transistor has two p-n junctions. The batteries should be connected such that
both junctions are forward biased
both junctions are reverse biased
one junction is forward biased and the other is reverse biased
A zener diode is used in
voltage regulator circuit
amplifier circuits
both voltage regulator and amplifier circuit
In a bipolar transistor which current is the largest
collector current
base current
emitter current
base current or emitter current
The power dissipation in a transistor is the product of
emitter current and emitter to base voltage
emitter current and collector to emitter voltage
collector current and collector to emitter voltage
n-type semiconductors
are negatively charged
are produced when indium is added as impurity to germanium
are produced when phosphorus is added as impurity to silicon
The voltage across a zener diode
is constant in forward direction
is constant in reverse direction
is constant in both forward and reverse directions
The carriers of n channel JFET are
free electrons and holes
holes
free electrons or holes
free electrons
At room temperature a semiconductor material is
perfect insulator
conductor
slightly conducting
Between which regions does BJT act like switch?
Cut off and saturation
Cut off and forward active
Forward active and cut off
Saturation and active
When a p-n-p transistor is operating in active region, the current in the n region is due to
only holes
only electrons
mainly holes
mainly electrons
In a JFET the width of channel is controlled by
gate voltage
drain current
source current
