Reverse Bias

Q. In a PN-junction diode,

1. the current in the reverse biased condition is generally very small
2. the current in the reverse biased condition is small but the forward biased current is independent of the bias voltage
3. the reverse biased current is strongly dependent on the applied bias voltage
4. the forward biased current is very small in comparison to reverse biased current

Q. A Si and a Ge diode has identical physical dimensions. The band gap in Si is larger than that in Ge. An identical reverse bias is applied across the diodes

1. The reverse current in Ge is larger than that in Si
2. The reverse current in Si is larger than that in Ge
3. The reverse current is identical in the two diodes
4. The relative magnitude of the reverse currents cannot be determined from the given data only

Q.

When a PN junction diode is reverse biased

1. Electrons and holes are attracted towards each other and move towards the depletion region

2. Electrons and holes move away from the junction depletion region

3. Height of the potential barrier decreases

4. No change in the current takes place

Q.

What is the current in the circuit shown below

1. 0 amp

2. 

3. 1 amp

4. 0.10 amp

Q.

PN-junction diode works as a insulator, if connected :

1. To A.C.
2. In forward bias
3. In reverse bias
4. None of these