a wire of resistance 3 ohm and length 10 cm is stretched to 30 cm. Assuming that it has a uniform cross section, what will be its new resistance? How to solve if the answer is 27 ohm ? plzzz tellll!!
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R new= n^2* R
n=30/10=3
Rn=3^2 * 3
=27 ohm
n=30/10=3
Rn=3^2 * 3
=27 ohm
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