Analog Electronics - GATE practice papers - Electronics & Communication for Q. 505
Q. What values of resistance are offered by an ideal diode in forward and reverse biased conditions respectively?(Marks : 01)- Published on 19 Oct 15a. zero & infinity
b. infinity & zero
c. zero & unity
d. unity & infinity
ANSWER: zero & infinity
Ideally, the diode operates in forward-biased condition .This is so because the current flows in forward-biased direction only when the resistance across the voltage is zero. Without any form of obstruction in the flow of current, diodes operates in forward-biasing.
On the contrary, the diode has to pass through an infinite resistance in reverse-biasing mode, which ultimately prevent it from conduction.
However, these both operating conditions of an ideal diode enable it to act as a perfect switch.
