A small radio operates on 3V and has a resistance of 15 ohm , at what rate does the radio use electric energy.
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potential diff = V = 3 Volts
R = 15 Ω
Power = V² / R = 9/15 W = 0.60 Watts
R = 15 Ω
Power = V² / R = 9/15 W = 0.60 Watts
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