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Diodes and Applications - Technical MCQs

Q1:

The characteristic curve for the complex model of a silicon diode shows that

A the barrier potential is 0 V

B the barrier potential stays fixed at 0.7 V

C the barrier potential increases slightly with an increase in current

D the barrier potential decreases slightly with an increase in current

ANS:C - the barrier potential increases slightly with an increase in current

In forward biasing, when 'p' terminal is connected with 'p' side of the battery and 'n' terminal is connected with 'n' side of the battery, then the potential barrier is increasing with increase in voltage because holes are attracted by positive charge and electrons is attracted by the negative charge.