In a common- base configuration of transistor will be , then current gain in common emitter configuration of transistor will be
49
98
4.9
24.5
In the following circuit, the output Y for all possible inputs A and B is expressed by the truth table
A B Y
0 0 0
0 1 0
1 0 0
1 1 1
0 0 1
0 1 1
1 0 1
1 1 0
Barrier potential of a p-n junction diode does not depend on
forward bias
doping density
diode design
temperature
The number of atoms per unit cell in bcc lattice is
1
2
4
9
If and β are current gains in common-base and common-emitter configurations of a transistor, then β is equal to
The voltage gain of an amplifier with 9% negative feedback is 10. The voltage gain without feedback will be
90
10
1.25
100
The correct relationship between the two current gains and in a transistor is
The transfer ratio β of a transistor is 50. The input resistance of the transistor when used in the common emitter configuration is 1kΩ. The peak value of the collector AC current for an AC input voltage of 0.01V peak is :
100 μA
0.01 mA
0.25 mA
500 μA
A transistor is operated in common emitter configuration at constant collector voltage Vc=1.5V such that a change in the base current from 100 to 150 produces a change in the collector current from 5mA to 10 mA. The current gain () is
67
75
50
If a full wave rectifier circuit is operating from 50Hz mains; the fundamental frequency in the ripple will be
70.7Hz
100Hz
25Hz
59Hz