Question

A piece of resistance wire has resistance of 16 ohm. Its diameter is doubled now its resistance will be
A) 8 ohm
B) 2 ohm
C) 4 ohm
D) 1 ohm​

Answer 1

Answer:

4ohm

Explanation:

r^2 is inversely proportional to resistance

so ✓16=4

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Answer 2

Answer:

Resistance is inversely proportional to Radius and Are of cross section

So radius will get square root

R = (√16)

R = 4 ohm

Hope it helps

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