◇. Define 1 kWh. How is this unit of energy related
to Joule?
◇. What is the commercial unit of energy?
◇
5. An electric device operates at 24 V and has a
resistance of 8.2. calculate the power consumed by
the device and the current flowing through it.
◇
6. Two identical resistors each of resistance 50 are
connected i) in series
ii ) in parallel,
iii) in turn to a battery of 10 V.
Calculate the ratio of power
consumed in the combination of resistance in the
two cases
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Answer:
the larger unit called kwh
1kwh=1000watt x 3600 sec
= 3.6 x 1000000 joule
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