A bulb is rated at 220V- 100W. What is its resistance? Two such bulbs are lighted in parallel for 5 hrs . What is the power consumed by the combination if the voltage of the source is 220V ? Also calculate how many units of electrical energy is consumed? Plz answer quickly
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Answer:
power=V*I; V/I= R
=> P= V²/R
Explanation:
100W= 220²/R
=> R =220*220/100= 484
hence resistance=484 ohms
Two bulbs =200w
when lighted for 5 hours yields 200* 5 whour
=1unit
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