Question

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Answer 1

Explanation:

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Answer 2

Explanation:

Let us consider the ratio as x as of length.

So length of 1 wire is x

And the second wire is 2x.

Let us consider ratio of area as y.

So of 1st wire it will be 2y.

And of 2nd it will be y.

Now we know the formula of resistance as

Resistance= Resistivity×Length / Area

Solving for 1st wire

It will be px/2y where p means Roh or resistivity.

And for 2nd wire

It will be 2px/y

Now the ratio will be

px/2y:2px/y

In dividing it we get

pxy/4pay

Where pxy gets cancelled

So 1:4 will be the ratio.