Question

Write two points of difference between electric energy and electric power. Out of 60 w and 40 w lamps, which one has higher electrical resistance when in use.

Answer 1

=P/V I1=60/V I2=40/V I1/I2=60/V/40/V =60/40 => I1>I2 Since, R is indirectly proportional to I I2 has high resistance So, 40W lamp has greater resistance. (c)Kilowatt per hour is the commercial unit of electric energy.1 Watt is 1 Joule per second. 1 kilowatt=1000 joules per second. Apply it for one hour (3600 seconds) and you have a kilowatt-hour, good for 3600 * 1000 joules=3600000joules.

Answer 2

Hii

you are welcome in my ans

power is inversely proportional to resistance

do 40 watt has high resistance

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