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Diode is a pn junction device which conducts (current flow)in forward direction. Zener diode is a device in which current flows in forward direction as well as in reverse direction.For a Zener...
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...
Zener diode is a special type of diode .an ordinery diode doesnt conducts current (but leakage current in the range of micro amps flows ) in reverse biased condition.as we increase reverse voltage...