How do you calculate the varistor?

A varistor is a variable resistor. It changes value dependent on the current draw and operates by changing its value as the resistor's temperature changes. For instance, during turn-on of a device,...

A varistor is a "variable resistor". When its value changes it then changes the amount of electricity it drops. Some of the energy goes to do the job; some of the energy is "dumped" out as heat. How...

The act of figuring out the answer.

Their are many ways to calculate the things in right way. Try to use calculator or some kind of small paper in your hand if you need to calculate things in hurry.

There is a long and complicated way to do it, but there is another simpler way called successive aproximation. To find the square root (S) of X, the equation is S2=X. Make a guess for S, call your...