Question

Tunnel diode can be used as an active device because__________

(a) its negative resistance region is used

(b) it conducts at a faster rate

(c) it triggers the flow of electrons in reverse bias

(d) of tunneling effect

The question was posed to me during an online interview.

The question is from Active and Passive Devices topic in division Diode Circuit of Analog Circuits

Answer 1

The correct choice is (a) its negative resistance region is used

Explanation: It is an active device since its impedance is positive and the V-I characteristics lie in the first & second quadrants, tunnel diodes can be used as an active device even though it is a diode which falls under the category of passive devices.