According to Ohm's Law, voltage equals what?

According to Ohm's Law, voltage equals what?

• A. The current divided by resistance
• B. The product of current and resistance
• C. The ratio of resistance to current
• D. The sum of current and resistance

Answer: (B)

Ohm's Law shows how voltage, current, and resistance relate to one another. Voltage is the electrical potential difference that pushes current through a circuit, and it equals the current multiplied by the resistance: V = I × R. This product form means that if you know how much current is flowing and how much opposition (resistance) the circuit offers, multiplying those two values gives the voltage. For example, 2 A through 3 Ω yields 6 V. The other expressions don’t describe voltage: dividing current by resistance gives a quantity with different units (conductance), the ratio of resistance to current isn’t voltage, and simply adding current and resistance isn’t part of Ohm’s Law.

Ohm's Law shows how voltage, current, and resistance relate to one another. Voltage is the electrical potential difference that pushes current through a circuit, and it equals the current multiplied by the resistance: V = I × R. This product form means that if you know how much current is flowing and how much opposition (resistance) the circuit offers, multiplying those two values gives the voltage. For example, 2 A through 3 Ω yields 6 V. The other expressions don’t describe voltage: dividing current by resistance gives a quantity with different units (conductance), the ratio of resistance to current isn’t voltage, and simply adding current and resistance isn’t part of Ohm’s Law.