Insulators
Nonlinear resistors
Carbon resistors
Resistors with zero temperature coefficients
Answer is Wrong!
Answer is Right!
The correct answer is: B. Nonlinear resistors.
A varistor is a two-terminal nonlinear resistor, with a large change in resistance with small changes in voltage. Varistors are commonly used as voltage limiters, surge
suppressors, and transient absorbers.Option A is incorrect because varistors are not insulators. They are resistors, which means that they conduct electricity.
Option C is incorrect because varistors are not carbon resistors. Carbon resistors are made of carbon, while varistors are made of a variety of materials,
including zinc oxide, barium titanate, and manganese oxide.Option D is incorrect because varistors do not have zero temperature coefficients. The resistance of a varistor changes with temperature, but the change is not linear.