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A torch bulb is rated 5 V and 500 mA. Calculate its (i) power, (ii) resistance, (iii) energy consumed when it is lighted for 4 hours. |
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Answer» <P> Solution :(i) P= VI `=5xx0.5= 2.5 ` Watt(ii) `R= (V)/(I)= (5)/(0.5) = 10 Omega` (iii ) `W= P xxt = 2.5xx4 xx3600` `=36000= 3.6 xx10^(4) J` |
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