A p-type material is electrically
positive
negative
neutral
depends on the concentration of p impurities
Let ne and nh represent the number density of electrons and holes in a semiconductor. Then
ne > nh if the semiconductor is intrinsic
ne < nh if the semiconductor is intrinsic
ne ≠ nh, if the semiconductor is intrinsic
ne = nh, if the semiconductor is intrinsic
In a n-p-n transistor amplifier, the collector current is 9 mA. If 90% of the electrons from the emitter reach the collector, then
α = 0.9, β = 9.0
the base current is 10 mA
the emitter current is 1 mA
α = 9.0, β = 0.9
In a properly biased transistor
both depletion layers are equally large
both depletion layers are equally small
emitter-base depletion layer is large but base-collector depletion layer is small
emitter-base depletion layer is small but base-collector depletion layer is large.
A semiconductor has an electron concentration of 8 x 1013 /m3 and hole concentration of 5.5 1012/m3. The semiconductor is
n-type
p-type
intrinsic semiconductor
p-n junction
In the figure shown below, which of the diodes are forward biased ?
1, 2, 3
2, 4, 5
1, 3, 4
2, 3, 4
Given below are four logic gate symbols . Those for OR, NOR and NAND are respectively
1, 4, 3
4, 1, 2
1, 3, 4
4, 2, 1
The electrical circuit used to get smooth DC output from a rectifier circuit is called
filter
oscillator
logic gates
amplifier
The emitter-base junction of a transistor is ............ biased while the collector-base junction is ......... biased.
forward, forward
forward, reverse
reverse, forward
reverse, reverse
B.
forward, reverse
In a transistor amplifier for better amplification the emitter-base junction of a transistor is forward biased while the collector-base junction is reverse biased.