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A typical dimmer circuit, designed based on an SCR, is connected to a 100 W bulb....

A typical dimmer circuit, designed based on an SCR, is connected to a 100 W bulb. Typically, a potentiometer is used to adjust the light intensity or to adjust the transfer output power to the bulb. Assume that the AC power supply voltage is equal to 160 V and 60 Hz and the transferred power to the bulb is equal to 100/4 W ( a quarter of the bulb rated power). Find the RMS voltage drop across the bulb.

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