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: Â Stress - Strain |
Â 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: Â Stress - Strain |
Â 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: Â 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: Â Stress - Strain |
Â 73%
From NCERT
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