A 2.5 kΩ resistor dissipates 0.5 W. The energy by this resistor in 3 minutes is _________.
Power
P=WtP=\frac{W}{t}P=tW
E=P×tE=P\times tE=P×t
E=0.5×3×60=90JE=0.5\times3\times60=90JE=0.5×3×60=90J
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