Find the power of the lamp, the resistance of which is 100 Ohm at a voltage of 220 V.

univerkov | May 3, 2021 | education

R = 100 Ohm – resistance of the electric lamp;

U = 220 Volts – mains voltage.

It is required to determine the lamp power W (Watt).

Let’s find the amperage of the electric lamp:

I = U / R = 220/100 = 2.2 Amperes.

Then the power of the electric lamp will be equal to:

W = U * I = 220 * 2.2 = 484 watts.

Answer: the power of an electric lamp is 484 watts.

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