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Q. No.The breaking stress in two wires of different materials \(A,B\) are in the ratio: \(\frac{S_A}{S_B}=\frac12,\) while their radii are in the ratio: \(\frac{r_A}{r_B}=\frac12.\) The tensions under which they break are \(T_A\) and \(T_B.\) Then \(\frac{T_A}{T_B}=\)?
1. \(2\)
2. \(\frac14\)
3. \(\frac18\)
4. \(\frac1{2\sqrt2}\)
1. \(2\)
2. \(\frac14\)
3. \(\frac18\)
4. \(\frac1{2\sqrt2}\)
Subtopic: Â Stress - Strain |
 74%
From NCERT
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A uniform rod of mass \(m,\) having cross-section \(A\) is pushed along its length \((L)\) by means of a force of magnitude, \(F.\) There is no friction anywhere. Ignore the weight of the rod. The longitudinal stress in the rod, at a distance \(L \over 3\) from the left end, is:
| 1. | tensile, \(F \over 3A\) |
| 2. | compressive, \(F \over 3A\) |
| 3. | tensile, \(2F \over 3A\) |
| 4. | compressive, \(2F \over 3A\) |
Subtopic: Â Stress - Strain |
From NCERT
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Let a wire be suspended from the ceiling (rigid support) and stretched by a weight \(W\) attached at its free end. The longitudinal stress at any point of cross-sectional area \(A\) of the wire is:
1. zero
2. \(\frac{2W}{A}\)
3. \(\frac{W}{A}\)
4. \(\frac{W}{2A}\)
1. zero
2. \(\frac{2W}{A}\)
3. \(\frac{W}{A}\)
4. \(\frac{W}{2A}\)
Subtopic: Â Stress - Strain |
 66%
From NCERT
NEET - 2023
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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 |
 73%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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The maximum load a wire can withstand without breaking when its length is reduced to half of its original length, will:
| 1. | be doubled |
| 2. | be halved |
| 3. | be four times |
| 4. | remain the same |
Subtopic: Â Stress - Strain |
 60%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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A mild steel wire of length \(\mathrm{2L}\) and cross-sectional area \(A\) is stretched, well within the elastic limit, horizontally between two pillars (figure). A mass \(m\) is suspended from the mid-point of the wire. Strain in the wire is:
1. \( \frac{x^2}{2 L^2} \)
2. \(\frac{x}{\mathrm{~L}} \)
3. \(\frac{x^2}{L}\)
4. \(\frac{x^2}{2L}\)
Subtopic: Â Stress - Strain |
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints
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NEET 2023 - Target Batch - Aryan Raj Singh
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