Questions
Ten identical electric bulbs, each rated 220 V, 50 W are used in parallel on 220 V line for 10 hours per day in a month of 30 days .T he electric energy consumed in kilo watt hours is :
detailed solution
Correct option is C
Energy consumed = Pt = (50 W) 10hoursday(30 days).= 15000 W hours = 15 kWhTalk to our academic expert!
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A resistor R is connected across a battery of emf 12 V. It observed that terminal potential differenceis 9 V and the power delivered to resistor is 18 W. Internal resistance of the battery ‘r’ and the resistance R are respectively
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