A wire is suspended from the ceiling and stretched under the action of a weight \(F\) suspended from its other end. The force exerted by the ceiling on it is equal and opposite to the weight.
(a) | Tensile stress at any cross-section \(A\) of the wire is \(F/A.\) |
(b) | Tensile stress at any cross-section is zero. |
(c) | Tensile stress at any cross-section \(A\) of the wire is \(2F/A.\) |
(d) | Tension at any cross-section \(A\) of the wire is \(F.\) |
Choose the correct option from the given ones:
1. (a) and (b) only
2. (a) and (d) only
3. (b) and (c) only
4. (a) and (c) only
(a) | The mass \(m\) should be suspended close to wire \(A\) to have equal stresses in both wires. |
(b) | The mass \(m\) should be suspended close to \(B\) to have equal stresses in both wires. |
(c) | The mass \(m\) should be suspended in the middle of the wires to have equal stresses in both wires. |
(d) | The mass \(m\) should be suspended close to wire \(A\) to have equal strain in both wires. |
1. | (b), (c) | 3. | (b), (d) |
2. | (a), (d) | 4. | (c), (d) |