Question

Two wires A and B of equal masses
and of same material are taken.
The diameter of the wire 'A' is half
the diameter of the wire 'B'. If the
resistance of the wire ‘A’ be 24 S2
the resistance of the wire 'B'is​

Answer 1

Answer:

As both the wires A and B are made up of the same metal, therefore their resistivity as well their density are the same

Mass of a wire = volume Density

Mass of a wire ,

where d is the density and D is the diameter and subscript A for wire A

Mass of a wire

(Given)

Resistance of wire A,

Resistance of wire B,

Divide by , we get

(Using (i))

But (Given)

or

Explanation:

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