Electronic Devices and Circuits - Engineering

Q1:

Which of the following exhibits negative resistance in a portion of its characteristics?

A Tunnel diode

B Zener diode

C JFET

D MOSFET and tunnel diode

ANS:A - Tunnel diode

Tunnel diode has negative resistance characteristics, the tunnel diode is heavily dopped it's dipping concentration is 1 in 10^3 compared to the zener diode tunnel diode heavily dropped.