a given wire of resistance 1 ohm is stretched to double its length . what will be its new resistance
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R=pl/A------(1)
l'=2l A'=A/2
R'=pl'/A
R'=4pl/A------(2)
from (1) and (2)
so R'=4R
l'=2l A'=A/2
R'=pl'/A
R'=4pl/A------(2)
from (1) and (2)
so R'=4R
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2
Explanation:
The SI unit of electrical energy is kWh. The Wh defines the amount of power consumed by the device in the duration of 1 hour
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