Questions
Calculate the number of units of electricity used if a bulb of 100 W is kept on for 5 hours.
detailed solution
Correct option is D
The number of units of electricity consumed isn = (total wattage× time in hour)/1000Total wattage = 100 W Time in hour = 5 hoursTherefore, n = (100×5)/1000= 0.5 unitsSo, the number of units of electricity consumed is 0.5 units.Talk 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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