What is the resistance of the incandescent lamp on which it is written: U = 120V, P = 60W?

Initial data: U (voltage on a given incandescent lamp) = 120 V; P (incandescent lamp power) = 60 W.

We express the resistance of this incandescent lamp from the formula for calculating the electrical power: P = U ^ 2 / R, whence R = U ^ 2 / P.

Calculation: R = 1202/60 = 240 ohms.

Answer: This incandescent lamp has a resistance of 240 ohms

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