Two lamps one rated 40 W-200 V and other 60W -200V ,are connected in parallel to the
electric mains supply .If the supply voltage is 200V calculate the current drawn ?
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Answer:- first lamp .
=> P=VI
=> I = P/V
=> I = 40/200
= > I =1/5 A. --------------(1)
second lamp.
=>P=VI
=>I= P/V
=>I =60/200
=>I= 3/10 A. -------------(2)
from (1) and (2) ,we get
CURRENT DRAWN = 1/5+3/10
=2+3/10
= 5/10
= 1/2. => 0.5 A
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