Question

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Answer 1

Answer: P and S are same

Please refer to the attached file

Answer 2

Answer:5-P and S will have same resistance.

6-copper wire.

Explanation:R=pL/A

p (resistivity) is same as all wires are of copper.

Thus manipulating the ratios of L and A we will get resistance of P and S wires as same.

In 6th question resistance and length are equal in both case

Therefore, from R=pL/A formula we get A=pL/R thus,area is directly proprtional to resistivity.

Since resistivity of copper is more than magnanin therefore area of cross section of copper wire will be more.

Hence,copper wire is thicker than magnanin wire.