Questions
How many 60 watt lamps may be safely run on a 230 volt circuit fitted with 5 amp fuse ?
detailed solution
Correct option is C
Current i i=60230=623ampLet n lamps are used in parallel, thenn×623≤5 or n≤19⋅1∴n=19Talk 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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