Physics, 20.03.2020 09:58 alexthebest3976

The socket of the lamp is equipped with a four-position switch for selecting different light intensities, with the positions described as follows: (1) off (switches S1 and S2 both open), (2) switch S1 closed, (3) switch S2 closed, and (4) switches S1 and S2 both closed. The lightbulb contains two filaments. When the lamp is connected to a 120 V source, one filament receives 120 W of power and the other receives 45 W. What is the total power input (in W) to the light bulb at the which configurations?

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