how does the resistance of a wire of 2 ohm change when it's diameter is tripled
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3
Answer:
As the resistance of a wire is inversely proportional to the square of the diameter of a conducting wire if its diameter is tripled its resistance becomes 9th part of the previous resistance. the resistance reduces to 1/9th of its original value.
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1
Answer:
area of cross section is inversely proportional to resistance.
So, when diameter is tripled, then new radius becomes six times the old radius.
Hence, the new resistance becomes 1/6 times the old resistance.
new resistance = 2 ohm
6
=1 ohm
3
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