A tourch bulb is rated at 2.5 volt and 0.75 ampier calculate Power, resister, energy if the
bulb is lighter for 4 hours.
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Explanation:
1) Power is given by P=VI=2.5×0.75=1.875W
(2) Resistance is given by R= V/I= 0.75/2.5=3.33 Ω
(3) Time Given=4hr=4×60×60sec
=14400sec
Energy Consumed E=Pt
=1.875×14400
=27000J
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