Pn Junction

A transistor is operated in a common emitter configuration at constant collector voltage V_c = 1.5 V such that a change in the base current from 100 \mu A to 150 \mu A produces a change in the collector current from 5 mA to 10 mA. The current gain (\beta ) is:

1. 67

2. 75

3. 100

4. 50

Which of the following is an example of forward biasing?

1.		2.
3.		4.

Two ideal diodes are connected to a battery as shown in the circuit. The current supplied by the battery is:

1.		2.	zero
3.		4.

In the given figure, a diode is connected to an external resistance $$ and an EMF of . If the barrier potential developed across the diode is , the current in the circuit will be:

1.
2.
3.
4.

The given circuit has two ideal diodes connected as shown in the figure below. The current flowing through the resistance will be:

1.		2.
3.		4.

Which one of the following represents the forward bias diode?

1.
2.
3.
4.

In a junction diode, the change in temperature due to heating:

1.	affects only reverse resistance.
2.	affects only forward bias.
3.	does not affect the resistance of the junction.
4.	affects the overall characteristics of a junction.

Out of the following which one is a forward-biased diode?

1.
2.
3.
4.

In the given circuits and the potential drop across the two junctions is equal in:

1.	both circuits and
2.	circuit only
3.	circuit only
4.	circuit only

Choose the correct circuit which can achieve the bridge balance :

1.		2.
3.		4.