Question

There is a dual of 8 ohm resistance on the aerial. Determine the aerial's new resistance.
(a) 2 ohm
(b) 4 ohm
(c) 7 ohm
(d) 10 ohm
Explain...​

Answer 1

Since resistance is 8ohm thus
It is given the length is stretched to be double so the area of crossection will become half so 8ohm=2l/1/2area which is equal to 4 times the old resistance that is 8x4=32

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Answer 2

Answer:

b).4 ohm

Explanation:

4 ohm is the aerial's new resistance.

It might be correct I am not sure about this answer.