Select Chapter Topics:

The breaking stress in two wires of different materials \(A,B\) are in the ratio: \(\dfrac{S_A}{S_B}=\dfrac12,\) while their radii are in the ratio: \(\dfrac{r_A}{r_B}=\dfrac12.\) The tensions under which they break are \(T_A\) and \(T_B.\) Then \(\dfrac{T_A}{T_B}=\)?

1. \(2\)

2. \(\dfrac14\)

3. \(\dfrac18\)

4. \(\dfrac1{2\sqrt2}\)

1. \(2\)

2. \(\dfrac14\)

3. \(\dfrac18\)

4. \(\dfrac1{2\sqrt2}\)

Subtopic: Stress - Strain |

73%

From NCERT

Please attempt this question first.

Hints

Please attempt this question first.

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: Stress - Strain |

From NCERT

Please attempt this question first.

Hints

Please attempt this question first.

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. | \(\dfrac{2W}{A}\) |

3. | \(\dfrac{W}{A}\) | 4. | \(\dfrac{W}{2A}\) |

Subtopic: Stress - Strain |

66%

From NCERT

NEET - 2023

Please attempt this question first.

Hints

Please attempt this question first.

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 |

74%

From NCERT

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

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: Stress - Strain |

60%

From NCERT

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

A mild steel wire of length \(2L\) 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. | \( \dfrac{x^2}{2 L^2} \) | 2. | \(\dfrac{x}{\mathrm{~L}} \) |

3. | \(\dfrac{x^2}{L}\) | 4. | \(\dfrac{x^2}{2L}\) |

Subtopic: Stress - Strain |

From NCERT

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hooke's law is applicable for:

1. | elastic materials only | 2. | plastic materials only |

3. | elastomers only | 4. | all of these |

Subtopic: Hooke's Law |

69%

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

The stress-strain curves are drawn for two different materials \(X\) and \(Y.\) It is observed that the ultimate strength point and the fracture point are close to each other for material \(X\) but are far apart for material \(Y.\) We can say that the materials \(X\) and \(Y\) are likely to be (respectively):

1. | ductile and brittle |

2. | brittle and ductile |

3. | brittle and plastic |

4. | plastic and ductile |

Subtopic: Stress - Strain Curve |

81%

From NCERT

NEET - 2019

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

Links

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

The figure shows the strain-stress curve for a given material. What is Young’s modulus for this material?

1. \(7.5\times10^{11}~\text{Nm}^{-2}\)

2. \(7.5\times10^{10}~\text{Nm}^{-2}\)

3. \(7.5\times10^{9}~\text{Nm}^{-2}\)

4. \(7.5\times10^{-10}~\text{Nm}^{-2}\)

Subtopic: Stress - Strain Curve |

78%

From NCERT

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

The stress-strain graphs for materials \(A\) and \(B\) are shown in the figure. Strength of material \(A\) is:

(The graphs are drawn to the same scale)

1. | greater than material \(B\) |

2. | equal to material \(B\) |

3. | less than material \(B\) |

4. | insufficient data |

Subtopic: Stress - Strain Curve |

73%

From NCERT

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

Links

To view explanation, please take trial in the course.

NEET 2025 - Target Batch