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(a) Write Joule's law of heating. (b) ...

(a) Write Joule's law of heating.
(b) The lamps, one rated 100 W, 220 V , and the other 60 W, 220 W V, are connected parallel to electric mains supply. Find the current drawn two bulbs from the line,if the supply voltage is 220 V.

Text Solution

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Current in 1st bulb `I_(1)=(P_(1))/(V )=100/220=5/11` or 0.45 A
Current in 2nd bulb `I_(2)=(P_(2))/(V )=60/220=3/11` A or 0.27 A
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