the question is:
A 60W incandescent light-bulb is designed to operate from 120V AC RMS. Its filament resistance is measured with a laboratory Ohm meter. The meter reads 17.5 Ohms however using the formula (VRMS2 / R) = Power, the 17.5Ohm filament should dissipate over 820 Watts. Explain the discrepancy of 60W vs 820W
ok so my "best educated guess" for this was that the filament resistance was being measured at room temperature but at operating temperature the filament resistance is much much greater which causes the decrease in power i am not 100 percent sure about this is this somewhat close?
A 60W incandescent light-bulb is designed to operate from 120V AC RMS. Its filament resistance is measured with a laboratory Ohm meter. The meter reads 17.5 Ohms however using the formula (VRMS2 / R) = Power, the 17.5Ohm filament should dissipate over 820 Watts. Explain the discrepancy of 60W vs 820W
ok so my "best educated guess" for this was that the filament resistance was being measured at room temperature but at operating temperature the filament resistance is much much greater which causes the decrease in power i am not 100 percent sure about this is this somewhat close?