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Mechanical Properties of Solids Test - 2

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Mechanical Properties of Solids Test - 2
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Weekly Quiz Competition
  • Question 1
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    The increase in the length of a wire on stretching is 0.025%. If its Poisson's ratio is 0.4, what is the percentage decrease in its diameter?
  • Question 2
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    A steel wire of cross-sectional area 3  10–6 m2 can withstand a maximum strain of 10–3. Young's modulus of steel is 2  1011 Nm–2. The maximum mass the steel wire can hold is (Take g = 10 ms–2)
  • Question 3
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    The increase in pressure (in kPa) required to decrease 200 litres volume of a liquid by 0.004% is (Bulk modulus of the liquid = 2100 MPa)
  • Question 4
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    There is no change in the volume of a wire due to the change in its length on stretching. The Poisson's ratio of material of wire is
  • Question 5
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    A wire elongates by l mm when a load 'W' is hanged from it. If the wire goes over a pulley and two weights of 'W' each are hung at the two ends, the elongation of the wire will be (in mm)
  • Question 6
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    A wire can be broken by applying a load of 200 N. The force required to break another wire of the same length and the same material, but double in diameter, is
  • Question 7
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    Two wires of the same length and made of the same material, but having radii in the ratio 1 : 2 are stretched by two unequal forces to produce equal elongation. What is the ratio of the two forces?
  • Question 8
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    Directions: The following question has four choices out of which ONLY ONE is correct.

    Which of the following is not a unit of Young's modulus?
  • Question 9
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    When a long spring is stretched by 2 cm, its potential energy is U. If the spring is stretched by 10 cm, its potential energy will be
  • Question 10
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    A body of mass 10 kg is attached to a 0.3 m long wire. Its breaking stress is 4.8 × 107 N/m2. The area of cross-section of wire is 10-6 m2. What is the maximum angular velocity with which it can be rotated in a horizontal circle?
  • Question 11
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    A student performs an experiment to determine the Young's modulus of a wire exactly 2 m long by Searle's method. In a particular reading, the student measures the extension in the length of the wire to be 0.8 mm with an uncertainty of ± 0.05 mm at a load of exactly 1.0 kg. The student also measures the diameter of the wire to be 0.4 mm with an uncertainty of ± 0.01 mm. Take g = 9.8 m/s2 (exact). The Young's modulus obtained from the reading is
  • Question 12
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    A spinner swings a cricket ball due to 
  • Question 13
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    A wire of length 2 m is made from 10 cc of copper. A force F is applied so that its length increases by 2 mm. Another wire of length 8 m is made from the same volume of copper. If the force F is applied to it, its length will increase by
  • Question 14
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    A wire of length L and area of cross-section A is stretched through a distance of x metres by applying a force F along the length. The work done in this process is (Y is Young's modulus of the material)
  • Question 15
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    Which of the following is the most elastic?
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