What does Ohm's Law express?

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Multiple Choice

What does Ohm's Law express?

Voltage, current, and resistance are linked by Ohm's Law. It states that the voltage across a conductor equals the current through it times its resistance. This form, V = I × R, shows how much voltage is needed to push a certain current given a certain resistance, or how much current flows for a given voltage and resistance. You can rearrange to I = V / R or R = V / I if you know different quantities, but the direct relationship expressed here is V = I × R. For a quick check, if you have a 12 V source across a 6 Ω load, the current is I = V / R = 12 / 6 = 2 A, and then V = I × R = 2 × 6 = 12 V, which is consistent. Other options involve power (P = V × I) or rearrangements that aren’t the standard Ohm’s Law form (R = V / I is a rearranged form, while V = I / R would give conductance, not resistance).

Voltage, current, and resistance are linked by Ohm's Law. It states that the voltage across a conductor equals the current through it times its resistance. This form, V = I × R, shows how much voltage is needed to push a certain current given a certain resistance, or how much current flows for a given voltage and resistance. You can rearrange to I = V / R or R = V / I if you know different quantities, but the direct relationship expressed here is V = I × R.

For a quick check, if you have a 12 V source across a 6 Ω load, the current is I = V / R = 12 / 6 = 2 A, and then V = I × R = 2 × 6 = 12 V, which is consistent.

Other options involve power (P = V × I) or rearrangements that aren’t the standard Ohm’s Law form (R = V / I is a rearranged form, while V = I / R would give conductance, not resistance).

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