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UPSC CDS Science Physics Questions Part 1

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Question : 38

Total: 105

Two wires are made having same length l and area of cross-section Wire 1 is made of copper and wire 2 is made of aluminium. It is given that the electrical conductivity of copper is more than that of aluminium. In this context, which one of the following statements is correct?

The resistance of wire 1 will be higher than that of wire 2.
The resistance of wire 2 will be higher than that of wire 1.
The resistance of both the wires will be the same.
If same current is flown through both the wires, the power dissipated in both the wires will be the same.

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