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A rod of length l and negligible mass is suspended at its two ends by two wires of steel (wire A) and aluminium (wire B) of equal lengths (Fig. 9.4). The cross-sectional areas of wires A and B are 1.0 mm2 and 2.0 mm2, respectively.

(a) Mass m should be suspended close to wire A to have equal stresses in both the wires.

(b) Mass m should be suspended close to B to have equal stresses in both the wires.

(c) Mass m should be suspended at the middle of the wires to have equal stresses in both the wires.

(d) Mass m should be suspended close to wire A to have equal strain in both wires.

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(b) Mass m should be suspended close to B to have equal stresses in both the wires.

(d) Mass m should be suspended close to wire A to have equal strain in both wires.

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