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Physics of Solids MCQs for MDCAT Practice

Physics section, Physics of Solids chapter. Up to eight free sample questions, each with the correct answer and a worked explanation. The full chapter opens in the app.

The bank has 472 active questions on this chapter. Your first 500 practice attempts are free, and every attempt includes a worked explanation.

  1. Question 1
    Lead becomes super conductor at temperature:
    • 12.66 K
    • 7.2 K (correct answer)
    • 3.0 K
    • 2.5 K
    Correct answer: B
    Tests knowledge of lead's critical temperature for superconductivity, a key property of certain materials below a specific threshold.
  2. Question 2
    Which of the following has the lowest value of Young's modulus?
    • Steel
    • Glass
    • Copper
    • Rubber (correct answer)
    Correct answer: D
    Young's modulus quantifies a material's stiffness; rubber, being highly deformable, exhibits the lowest Young's modulus among common solids.
  3. Question 3
    Which of the following affects the elasticity of a substance?
    • Impurity of a substance
    • Hammering and annealing
    • Change in temperature
    • All of these (correct answer)
    Correct answer: D
    Elasticity of solids is influenced by several factors including impurities, mechanical treatments like hammering and annealing, and temperature changes.
  4. Question 4
    Which of the following is not a ferromagnetic substances:
    • Copper (correct answer)
    • Steel
    • Iron
    • Cobalt
    Correct answer: A
    Identify common ferromagnetic materials and distinguish them from non-magnetic substances like copper, a key concept in magnetism and solid-state physics.
  5. Question 5
    Strain energy in a deformed energy is stored in the form of:
    • Elastic Energy
    • Potential Energy (correct answer)
    • Plastic Energy
    • Kinetic Energy
    Correct answer: B
    Strain energy stored in a deformed body is a form of potential energy due to the work done against internal elastic forces.
  6. Question 6
    To determine Young’s modulus of a material of a given wire of length L we use:
    • Melda's Apparatus
    • Young’s Apparatus
    • Searle’s Apparatus (correct answer)
    • Cavendish Apparatus
    Correct answer: C
    Determine the apparatus used to measure Young's modulus, a crucial property of solid materials related to elasticity and deformation.
  7. Question 7
    The number of atoms per unit cell in BCC are
    • Two (correct answer)
    • Four
    • Six
    • Nine
    Correct answer: A
    Body-Centered Cubic (BCC) unit cells contain 2 atoms, a result of corner atoms being shared among 8 cells and the central atom being fully within one cell.
  8. Question 8
    Which of the following are mechanical properties of a material:
    • Ductility
    • Strength
    • Stiffness
    • All of the above (correct answer)
    Correct answer: D
    Mechanical properties describe a material's response to applied forces. Ductility, strength, and stiffness are all key indicators of how a solid behaves under stress.

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