Question

A wire of length 200 m having resistance 56ohm if the same wire, is taken wire the same length 20m what is its resistance

Answer 1

Answer:

$resistance = \frac{ro \times l}{area} \\ so \: resistance \: is \: directly \: propotional \: to \: length \\ \frac{56}{r} = \frac{200}{20} \\ r = 560ohm$

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