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Semiconductor Electronics

AIPMT 2002MCQEasy📈 Topic in 25% papers+4−1
Ques. 1AIPMT 2002

In a p-n junction

  1. high potential at n side and low potential at p side
  2. high potential at p side and low potential at n side
  3. p and n both are at same potential
  4. undetermined.

Answer

(1) high potential at n side and low potential at p side

Solution

As per NCERT, when a p-n junction is formed, holes diffuse from p to n and electrons from n to p, leaving uncovered negative acceptor ions on the p side and positive donor ions on the n side of the depletion layer.

This space charge sets up an electric field from the n side to the p side and a barrier potential across the junction.

Since the field points from n to p, the n side is at the higher potential and the p side at the lower potential.

High potential at n side and low potential at p side.

Answer: (1)

Keep practising — Semiconductor Electronics

Ques. 2AIPMT 2002

The given truth table is for which logic gate? [figure]

  1. NAND
  2. XOR
  3. NOR
  4. OR.
Ques. 3AIPMT 2002

For the given circuit of p-n junction diode, which is correct? [figure]

  1. in forward bias the voltage across R is V
  2. in reverse bias the voltage across R is V
  3. in forward bias the voltage across R is 2V
  4. in reverse bias the voltage across R is 2V.
Ques. 4AIPMT 2002

For a transistor ICIE = 0.96, then current gain for common emitter is

  1. 12
  2. 6
  3. 48
  4. 24
Out of syllabus
Ques. 5AIPMT 2001

The given truth table is for which logic gate [figure]

  1. NAND
  2. XOR
  3. NOR
  4. OR
Ques. 6AIPMT 2001

The current in the circuit will be [figure]

  1. 540 A
  2. 550 A
  3. 510 A
  4. 520 A
Ques. 7AIPMT 2001

For a common base circuit if ICIE = 0.98 then current gain for common emitter circuit will be

  1. 49
  2. 98
  3. 4.9
  4. 25.5
Out of syllabus
Ques. 8AIPMT 2000

From the following diode circuits, which diode is in forward biased condition?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 9AIPMT 2000

The correct relation between and for a transistor is

  1. = 1-
  2. = 1-
  3. = -1
  4. = 1
Out of syllabus

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