Multiple choice

Which of the following is the application of Voltage Dependent Resistors?

  1. Overvoltage protection crowbar for power supplies.

  2. To prevent massive power fluctuations.

  3. To suppress surges.

  4. Better cuts on metals and the welding of dissimilar metals without the use of a flux.

  5. Series resistors or current-regulated power supplies.
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C Correct answer
Explanation

A varistor remains non-conductive as a shunt-mode device during normal operation when the voltage across it remains well below its clamping voltage, thus varistors are typically used for suppressing line voltage surges.

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