Question

Why is Power rating important? How can we measure safe voltage and safe current of a resistor? Explain your answer
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Answer 1

A resistor can be used at any combination of voltage (within reason) and current so long as its “Dissipating Power Rating” is not exceeded with the resistor power rating indicating how much power the resistor can convert into heat or absorb without any damage to itself.

1.)Voltage is measured in volts, symbolized by the letters “E” or “V”.

2.)Current is measured in amps, symbolized by the letter “I”.

3.)Resistance is measured in ohms, symbolized by the letter “R”.

4.)Ohm's Law: E = IR ; I = E/R ; R = E/I.

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