. An electric bulb is marked 100 W 230 V
If the supply voltage drops to 115 V, what will be the total heat and light energy, total liberated by the bulb in 20 minutes?
Best Answer
Explanation:
The bulb is rated 100W,220W
The maximum current drawn
I=P/4
=100/220=5/11A
When the voltage is 115V,then the power consumed given by,
P=VI
=115X(5/11)=52.28J/s
But it is lighted for 20 minutes,so the total energy consumed by
E=PXT=52.28X20X60=62736J
Final Answer:
Hence,62736J will be liberated by the bulb in 20 minutes from of heat and light energy
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