How much current does a 60-W light bulb draw when connected...

How much current does a $60-\mathrm{W}$ light bulb draw when connected to its proper voltage of $120 \mathrm{~V}$ ?
From $\mathrm{P}=V I$,
$$
I=\frac{P}{V}=\frac{60 \mathrm{~W}}{120 \mathrm{~V}}=0.50 \mathrm{~A}
$$

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Key Concepts

Power Formula (P = V × I)

The power formula, expressed as P = V × I, relates electrical power to voltage and current. This formula is fundamental in electrical circuits as it allows one to calculate any one of the three variables—power, voltage, or current—when the other two are known.

Electrical Current

Electrical current is the flow of electric charge in a circuit, measured in amperes (amps). It indicates the amount of charge passing a point per unit time and is essential for analyzing circuit behavior and performance.

Electrical Power

Electrical power is the rate at which electrical energy is consumed or converted in a circuit, usually measured in watts. It quantifies how much energy is used or produced over time and is a key concept in understanding energy consumption in electrical devices.

Voltage

Voltage, measured in volts, is the electrical potential difference between two points in a circuit. It is the force that pushes electric charges through a conductor, and is crucial in determining how much current flows through a circuit.

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