If a resistor has a current of 3 A flowing through it and the voltage across it is 12 V, what is its resistance?

4 Ω

36 Ω

9 Ω

16 Ω

Answer and Solution

A. 4 Ω

Using Ohm's Law, R = V/I = 12 V / 3 A = 4 Ω.

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