Power is calculated by multiplying which two quantities?

Power is calculated by multiplying which two quantities?

• A. Resistance times voltage
• B. Current times resistance
• C. Voltage times current
• D. Current divide by voltage

Answer: (C)

Power in a circuit is the rate at which energy is transferred, and it equals the product of voltage and current: P = V × I. Voltage provides energy per unit charge, while current is the flow of charge per unit time, so multiplying them gives how much energy per unit time is delivered or used, measured in watts. If you know resistance as well, you can derive other equivalent forms like P = I^2R or P = V^2/R using Ohm’s law (V = IR). The other options don’t represent power: voltage times resistance gives volt-amps-equivalents, not watts; current divided by voltage yields conductance, not power.

Power in a circuit is the rate at which energy is transferred, and it equals the product of voltage and current: P = V × I. Voltage provides energy per unit charge, while current is the flow of charge per unit time, so multiplying them gives how much energy per unit time is delivered or used, measured in watts. If you know resistance as well, you can derive other equivalent forms like P = I^2R or P = V^2/R using Ohm’s law (V = IR). The other options don’t represent power: voltage times resistance gives volt-amps-equivalents, not watts; current divided by voltage yields conductance, not power.