Two cables of copper are of equal lengths. One of them has a single wire of area of cross‐section 
, while other has 10 wires of cross‐sectional area 
each. Give their suitability for transporting A.C. and D.C.
Text Solution
Verified by ExpertsThe correct answer is:
A
The major portion of the A.C. flows on the surface of the wire. So where a thick wire is required, a number of thin wires are joined together to give an equivalent effect of a thick wire. Therefore multiple strands are suitable for transporting A.C. Similarly multiple strands can also be used for D.C.
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