Electronic Devices and Circuits - Engineering

Q1:

A voltage of 9 V is applied in forward direction to a semiconductor diode in series with a load resistance of 1000 Ω. The voltage across the load resistance is zero. It indicates that

A diode is short circuited

B diode is open circuited

C resistor is open circuited

D diode is either o.c or s.c

ANS:B - diode is open circuited

Since there is no voltage across load resistor, the current is zero and diode is open-circuit. If diode is short- circuited or resistor is open-circuited almost 9 V will appear across resistor.