NEW
New Website Launch
Experience the best way to solve previous year questions with mock tests (very detailed analysis), bookmark your favourite questions, practice etc...
1

AIPMT 2003

MCQ (Single Correct Answer)
A n-p-n transistor conducts when
A
both collector and emitter are positive with respect to the base
B
collector is positive and emitter is negative with respect to the base
C
collector is positive and emitter is at same potential as the base
D
both collector and emitter are negative with respect to the base

Explanation

When the collector is positive and emitter is negative with respect to base, it causes the forward biasing for each junction, which causes conduction of current.
2

AIPMT 2003

MCQ (Single Correct Answer)
Reverse bias applied to a junction diode
A
lowers the potential barrier
B
raises the potential barrier
C
increases the majority carrier current
D
increases the minority carrier current

Explanation

In reverse bias, the size of the depletion region increases thereby increasing the potential barrier.
3

AIPMT 2002

MCQ (Single Correct Answer)
For the given circuit of p-n junction diode which is correct

A
in forward bias the voltage across R is V
B
in reverse bias the voltage across R is V
C
in forward bias the voltage across R is 2V
D
in reverse bias the voltage across R is 2V.

Explanation

In forward biasing, the resistance of p-n junction diode is very low to the flow of current. So practically all the voltage will be dropped across the resistance R, i.e. voltage across R will be V.

In reverse biasing, the resistance of p-n junction diode is very high. So the voltage drop across R is zero.
4

AIPMT 2002

MCQ (Single Correct Answer)
In a p-n junction
A
high potential at n side and low potential at p side
B
high potential at P side and low potential at n side
C
p and n both are at same potential
D
undetermined.

Explanation

For conduction, p-n junction must be forward biased. For this p-side should be connected to higher potential and n-side to lower potential.

Joint Entrance Examination

JEE Main JEE Advanced WB JEE

Graduate Aptitude Test in Engineering

GATE CSE GATE ECE GATE EE GATE ME GATE CE GATE PI GATE IN

Medical

NEET

CBSE

Class 12