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Assertion (A): Ductile metals are used to prepare thin wires. Reason (R) : In the stress-strain curve of ductile metals, the length between the points representing elastic limit and breaking point is very small.

1. Both (A) and ( \( R \) ) are true and ( \( R \) ) is the correct explanation of (A)
2. Both (A) and (R) are true and (R) is not correct explanation of (A)
3. (A) is true but (R) is false.
4. (A) is false but (R ) is true

Correct answer: (A) is true but (R) is false.

Solution

Ductile metals are used for thin wires because they can be drawn out extensively without breaking. The reason is false: ductile metals typically have a large plastic region between the elastic limit and breaking point, not a very small one.

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