# Electronics - Diodes and Applications - Discussion

Discussion Forum : Diodes and Applications - General Questions (Q.No. 1)
1.
What is a varistor?
a voltage-dependent resistor
a voltage-dependent diode
a current-dependent resistor
a current-dependent diode
Explanation:
No answer description is available. Let's discuss.
Discussion:
22 comments Page 1 of 3.

Komal said:   1 decade ago
A varistor is a resistor that depends or varies in accordance with voltage.

RAJENDAR said:   1 decade ago
I want rest of components details also. Anyone.

Neelaji said:   1 decade ago
A varistor is a resistor which changes resistance in accordance with the temperature.

Swapnil said:   1 decade ago
This is a kind of resistor whos values changes in accordance with the change in applied voltage.

Kuldeep said:   1 decade ago
This is a kind of resistor whos values changes in accordance with the change in applied voltage.

Satya said:   1 decade ago
This is a resistor whose value changes with the applied voltage. We can get this type of resistors from FETs.

Kishan TJ said:   1 decade ago
Varistor is the special type of resistor, its changes the resistance un accordance with the temperature.

DEEPAK JHA said:   1 decade ago
When voltage drop increases across the resistor, power dissipation also increase because of P=VI and thus temperature increases.

Due to increase in temperature there are a lot of free electrons generates in the wire which moves randomly in all direction and provide barrier in the path of current & hence the resistance of wire increase.

Saranya said:   1 decade ago
I have a small doubt. High barrier potential is provided when the temperature is increased in reverse bias. Then it offers high resistance. When the temperature is increased in forward bias, in that situation there is small barrier potential. Then current is high and resistance is small.

Vasanthi.m said:   1 decade ago
Varistor is a special type resistor it depend upon the voltage varistor also called as voltage depending resistor.