Energy lost due to resistance?

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If electricity passes through a system at 12 volts, with 0.42 Amps of current, and 28.8 ohms of resistance, how do you calculate the energy lost in joules?
 

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berkeman
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If electricity passes through a system at 12 volts, with 0.42 Amps of current, and 28.8 ohms of resistance, how do you calculate the energy lost in joules?

Power multiplied by time...
 
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mathman
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[itex]P=I^2R[/itex] is energy loss per unit time.
 

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