A wire of length 5m and radius 1 mm has a resistance of 1 ohm. What length of the wire of the same material at the same temperature and of radius 2 mm will also have a resistance of 1 ohm

Question:

Options :

a) 1.25 m
b) 2.5 m
c) 10 m
d) 20 m

Answer :

d) 20 m

Answer Steps :

Step:-1

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