A torch bulb is rated 5v and 500ma. calculate its (i) power, (ii) resistance, (iii) energy consumed when it is lighted for 4 hours.
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P=VI
P=5×500×1000=2500000 watt
R=V\I
R=5\500000
0.00001 om
P=5×500×1000=2500000 watt
R=V\I
R=5\500000
0.00001 om
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