Free Physics of Solids MCQs with Answers
320 Physics of Solids MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Solids are compared through crystal structure, amorphous arrangement, elasticity, plastic deformation, stress, strain and Young’s modulus. Electrical behavior depends on available charge carriers and band structure, so conductors, insulators and semiconductors must be distinguished from mechanical properties such as strength, stiffness and brittleness.
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320 questions · page 11 of 16
- A. Diamagnetic
- B. Paramagnetic
- C. Ferromagnetic
- D. None of these
Explanation: The correct answer is Ferromagnetic. Ferromagnetic materials have a permeability that is significantly greater than one, which means they…
Correct answer: Ferromagnetic- A. Diamagnetic
- B. Paramagnetic
- C. Ferromagnetic
- D. All of these
Explanation: The correct answer is Diamagnetic. Diamagnetic substances are repelled by a magnetic field because they create an induced magnetic field…
Correct answer: Diamagnetic- A. Magnetism
- B. Demagnetism
- C. Energy dissipation per cycle
- D. All of the above
Explanation: The area of the hysteresis loop represents the energy dissipated as heat due to internal friction during each cycle of magnetisation and…
Correct answer: Energy dissipation per cycle- A. Ferromagnetic material changes to paramagnetic material
- B. Paramagnetic material changes to ferromagnetic material
- C. Diamagnetic material changes to ferromagnetic material
- D. Ferromagnetic material changes to diamagnetic material
Explanation: The Curie temperature is the threshold at which a ferromagnetic material becomes paramagnetic.
Correct answer: Ferromagnetic material changes to paramagnetic material- A. Micro ohm
- B. Pico ohm
- C. Mega ohm
- D. Zero
Explanation: Superconductors are materials that, below a specific critical temperature, exhibit zero electrical resistance.
Correct answer: Zero- A. 10-2 to 102
- B. 10-6 to 101
- C. 106 to 108
- D. 10-8 to 108
Explanation: The correct answer is 10-6 to 101 ohm-meter, which is characteristic of semiconductors.
Correct answer: 10-6 to 101207. A valence band is
- A. Hole donor
- B. Electron donor
- C. Electron acceptor
- D. All of these
Explanation: The valence band in a solid is the energy band that is filled with electrons at absolute zero temperature.
Correct answer: Electron donor- A. Young's modulus for a perfectly rigid body is zero
- B. Bulk modulus is relevant for solids, liquids, and gases
- C. Rubber is less elastic than steel
- D. The Young's modulus and shear modulus are relevant for solids
Explanation: The correct answer is Option A: 'Young's modulus for a perfectly rigid body is zero' because it is incorrect.
Correct answer: Young's modulus for a perfectly rigid body is zero- A. 1/2 × Load × Extension
- B. 1/2 × Stress × Strain
- C. 1/2 × Load × Strain
- D. 1/2 × Load × Stress
Explanation: The energy stored in a strained wire is given by the formula 1/2 × Load × Extension.
Correct answer: 1/2 × Load × Extension- A. Double
- B. Be halved
- C. Four times
- D. Remains the same
Explanation: The ability of a wire to withstand a load without breaking is related to its cross-sectional area and its length.
Correct answer: Double- A. Will also double
- B. Will become four times
- C. Will remain the same
- D. Will decrease
Explanation: Young's modulus, a measure of a material's stiffness, generally decreases with an increase in temperature.
Correct answer: Will decrease- A. Volumetric
- B. Shear
- C. Longitudinal and shear
- D. Longitudinal
Explanation: When a spring is stretched by a load, it experiences two types of strain: longitudinal and shear.
Correct answer: Longitudinal and shear- A. s2 /2y
- B. 2y/s2
- C. s/2y
- D. 2s2y
Explanation: The energy stored per unit volume in a wire under elastic deformation is given by the formula U = (1/2) * Y * S2, where U is the energy…
Correct answer: s2 /2y- A. Impurity of a substance
- B. Hammering and annealing
- C. Change in temperature
- D. All of these
Explanation: The elasticity of a substance, which is its ability to return to its original shape after deformation, can be influenced by several…
Correct answer: All of these- A. Superconducting
- B. Ferromagnetic
- C. Low retentivity
- D. Both (a) and (c)
Explanation: The Curie temperature is the temperature above which a ferromagnetic material loses its permanent magnetic properties and becomes…
Correct answer: Ferromagnetic- A. Stronger to the weaker parts of the field
- B. From weaker to the stronger parts of the field
- C. Perpendicular to the field
- D. In none of the above directions
Explanation: Diamagnetic materials are characterised by their tendency to create an induced magnetic field in the opposite direction to an applied…
Correct answer: Stronger to the weaker parts of the field- A. Low retentivity and high coercive force
- B. High retentivity and high coercive force
- C. Low retentivity and low coercive force
- D. High retentivity and low coercive forces
Explanation: Electromagnets are made of soft iron because it has low retentivity and low coercive force, meaning it can be easily magnetised and…
Correct answer: Low retentivity and low coercive force- A. Remains the same
- B. Loses its magnetism
- C. Becomes a strong magnet
- D. Either (a) or (c)
Explanation: The correct answer is that when a magnetic substance is heated, it loses its magnetism.
Correct answer: Loses its magnetism- A. 1 : 3
- B. 1 : 9
- C. 9 : 1
- D. 3 : 1
Explanation: The extension of a wire under an applied force is directly proportional to its length when the material and force are constant.
Correct answer: 1 : 3- A. 1 : 3
- B. 3 : 1
- C. 9 : 1
- D. 1 : 9
Explanation: The correct answer is 3 : 1. When two wires of the same material and cross-sectional area have lengths in the ratio 1:3, the force…
Correct answer: 3 : 1