Question

A voltage dependent,non linear resistor used to suppresshigh voltage transients a)rectifier b)variator c)regulator d)transistor

Answer 1

Answer:

Varistors are used as control or compensation elements in circuits either to provide optimal operating conditions or to protect against excessive transient voltages. When used as protection devices, they shunt the current created by the excessive voltage away from sensitive components when triggered.

The name varistor is a portmanteau of varying resistor. The term is only used for non-ohmic varying resistors. Variable resistors, such as the potentiometer and the rheostat, have ohmiccharacteristics.