Ohm's law expresses voltage as the product of current and resistance. Which expression correctly represents V?

Ohm's law expresses voltage as the product of current and resistance. Which expression correctly represents V?

• A. Resistance times Current
• B. Current times Resistance
• C. Power times Resistance
• D. Current divided by Resistance

Answer: (B)

Voltage comes from the push that drives current through a resistance, and Ohm's law ties these together as V = I × R. So the expression that correctly represents V is current times resistance. Writing it as I × R matches the standard form V = I R, and since multiplication is commutative, resistance times current would give the same value, but the conventional notation puts current first. The other options don’t express voltage as a product of current and resistance: using power would describe a different relation, and dividing current by resistance would yield a different quantity. For example, with I = 2 A and R = 3 Ω, V = 2 × 3 = 6 V.

Voltage comes from the push that drives current through a resistance, and Ohm's law ties these together as V = I × R. So the expression that correctly represents V is current times resistance. Writing it as I × R matches the standard form V = I R, and since multiplication is commutative, resistance times current would give the same value, but the conventional notation puts current first. The other options don’t express voltage as a product of current and resistance: using power would describe a different relation, and dividing current by resistance would yield a different quantity. For example, with I = 2 A and R = 3 Ω, V = 2 × 3 = 6 V.