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7 April, 13:51

A heater with an effective resistance of 4.8 ohms is connected to 240.0 volts if it operated approximately 25% of the time and electricity costs $0.10 per kWh what will be the electrical bill for30 days

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  1. 7 April, 15:25
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    - - Power used when the heater is running =

    V²/R = (240) ²/4.8 = 12,000 watts. (12 KW)

    (A gigantic heater ... suitable for maybe a theater, not for a home.)

    - - Energy consumed in one day:

    (12 KW) x (24 hours) x (25%) = 72 KwH per day

    - - Energy consumed in 30 days: (72 KwH/day) x (30 days) =

    2,160 KwH in 30 days

    - - Cost = ($0.1 / KwH) x (2,160 KwH) = $216.00 in 30 days
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