Question

The physical quantity that determines the rate at which energy is delivered by an electric current is

• A. potential difference
• B. electric power
• C. electric resistance
• D. electric resistivity

Answer 1

The correct option is B electric power

The physical quantity that determines the rate at which energy is delivered by an electric current is electric power. The SI unit of electric power is watt (W).

1 W of electrical power is equivalent to 1 Joule of electrical energy consumed in 1 second time. It is mathematically expressed as $P=\frac{E}{t}$, where $E$ is the electrical energy and $t$ is time.