The breaking stress of a wire depends on:

1. material of the wire
2. length of the wire
3. radius of the wire
4. shape of the cross-section
Subtopic:  Stress - Strain |
 81%
From NCERT
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A wire can sustain a weight of \(20\) kg before breaking. If the wire is cut into two equal parts, each part can sustain a weight of:

1. \(10\) kg 2. \(20\) kg
3. \(40\) kg 4. \(80\) kg
Subtopic:  Stress - Strain |
 72%
From NCERT
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A heavy uniform rod is hanging vertically from a fixed support. It is stretched by its own weight. The diameter of the rod is:

1. smallest at the top and gradually increases down the rod.
2. largest at the top and gradually decreases down the rod.
3. uniform everywhere.
4. maximum in the middle.
Subtopic:  Stress - Strain |
From NCERT
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A heavy mass is attached to a thin wire and is whirled in a vertical circle. The wire is most likely to break:

1. when the mass is at the highest point
2. when the mass is at the lowest point
3. when the wire is horizontal
4. at an angle of \(\cos^{-1}(\frac{1}{3})\) from the upward vertical

Subtopic:  Stress - Strain |
 73%
From NCERT
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