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If a 100 ohm resistor is needed in an electric circuit carrying a current of 0.3 amperewhat resistor would you select?
Wiki User
∙ 13y ago
A 100 ohm resistor carrying a current of 0.3 amperes would, by Ohm's Law, have a potential difference of 30 volts. A current of 0.3 amperes through a voltage of 30 volts would, by the Power Law, dissipate a power of 9 watts.
You need a 10 watt resistor, alhough it is better to use a 20 watt resistor.
E = IR
30 = (0.3)(100)
P = IE
9 = (30)(0.3)
Wiki User
∙ 13y ago
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