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Four wires of the same material and of dimensions as under are stretched by a load of the same magnitude separately. Which one of them will be elongated maximum

Four wires of the same material and of dimensions as under are stretched by a load of the same magnitude separately. Which one of them will be elongated maximum?

(a)

Wire of 1 m length and 2 mm diameter

(b)

Wire of 2 m length and 2 mm diameter

(c)

Wire of 3 m length and 1.5 mm diameter

(d)

Wire of 1 m length and 1 mm diameter

Answer:

(c)

Explanation

The wire with 3 m length and 1.5 mm diameter will be elongated the most.