12
MCQ (Multiple Correct Answer)
In a $n-p-n$ transistor circuit, the collector current is 10 mA . If 95 per cent of the electrons emitted reach the collector, which of the following statements are true?
A
The emitter current will be 8 mA
B
The emitter current will be 10.53 mA
C
The base current will be 0.53 mA
D
The base current will be 2 mA
13
MCQ (Multiple Correct Answer)
In the depletion region of a diode
A
there are no mobile charges
B
equal number of holes and elections exist, making the region neutral
C
recombination of holes and electrons has taken place
D
immobile charged ions exist
14
MCQ (Multiple Correct Answer)
What happens during regulation action of a Zener diode?
A
The current and voltage across the Zener remains fixed
B
The current through the series Resistance $\left(R_s\right)$ changes
C
The Zener resistance is constant
D
The resistance offered by the Zener changes
15
MCQ (Multiple Correct Answer)
To reduce the ripples in rectifier circuit with capacitor filter
A
$R_L$ should be increased
B
input frequency should be decreased
C
input frequency should be increased
D
capacitors with high capacitance should be used
16
MCQ (Multiple Correct Answer)
The breakdown in a reverse biased $p-n$ junction is more likely to occur due to
A
large velocity of the minority charge carriers if the doping concentration is small
B
large velocity of the minority charge carriers if the doping concentration is large
C
strong electric field in a depletion region if the doping concentration is small
D
strong electric field in the depletion region if the doping concentration is large