Question

Two cables of copper are of equal lengths. One of them has a single wire of area of cross-section $A$, while other has 10 wires of cross-sectional area $\frac{A}{10}$ each. Give their suitability for transporting $A.C$. and $D.C.$

• A. Only multiple strands for A.C, either for D.C.
• B. Only multiple strands for A.C, only single strand for D.C.
• C. Only single strand for D.C, either for A.C.
• D. Only single strand for A.C, either for D.C.

Answer 1

Answer: (A)

For transporting $D C$ both wires are equally suitable, but for transporting $A C$ we prefer wire with multiple strands.
$A C$ is transmitted more by the surface of the conductor and hence we don't use a single thick