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 4 of 16
- A. valence band
- B. forbidden band
- C. conduction band
- D. innermost band
Explanation: In solid-state physics, the energy bands in solids are categorized into the valence band, conduction band, and forbidden band (also known…
Correct answer: conduction band- A. ferromagnetic
- B. paramagnetic
- C. diamagnetic
- D. superconductor
Explanation: After the Curie temperature, iron loses its ferromagnetic properties and becomes paramagnetic.
Correct answer: paramagnetic63. Minimum number of atoms arranged in a solid showing the whole characteristics of the solid is called
- A. crystal
- B. unit cell
- C. molecules
- D. all are correct
Explanation: The minimum number of atoms arranged in a solid showing the whole characteristics of the solid is called a unit cell.
Correct answer: unit cell- A. low temp superconductor
- B. high temp superconductor
- C. superconductors do not exist above 77 K
- D. moderate temp superconductor
Explanation: Superconductors with critical temperatures above 77 K are categorized as high-temperature superconductors.
Correct answer: high temp superconductor- A. orbital motion of electron
- B. spinning of proton
- C. spinning of electron
- D. all
Explanation: In an atom, the magnetic field exists due to various phenomena:The orbital motion of electrons generates a magnetic field.The spinning of…
Correct answer: all- A. Wm⁻²K²
- B. Wm²K⁻⁴
- C. Wm⁻⁴K⁴
- D. Wm⁻⁴K⁻⁴
Explanation: tefan's constant (σ) is expressed in the SI unit of Wm2K−4Wm2K−4.Incorrect Options and Explanations: (a) Wm⁻²K² - This unit does not…
Correct answer: Wm²K⁻⁴- A. Compressibility
- B. Young's modulus
- C. Bulk's modulus
- D. Shear's modulus
Explanation: The ratio of volumetric strain to volumetric stress is called c. Bulk's modulus.Here's why:Volumetric strain: It represents the relative…
Correct answer: Bulk's modulus- A. 170 kg/s2
- B. 245 kg/s2
- C. 215 kg/s2
- D. 201 kg/s
Explanation: Hooke's Law describes the relationship between the force exerted by a spring (F) and its displacement (x) from the equilibrium position.
Correct answer: 245 kg/s2- A. 5β - 4α
- B. β - α
- C. 5α -4β
- D. 9(β - α)
Explanation: The relationship between the force applied on a spring and the resulting displacement can be described by Hooke's Law, which states that…
Correct answer: 9(β - α)- A. Regular arrangement
- B. Covalent arrangement
- C. Somewhat defective
- D. All of them
Explanation: Crystalline solids have a regular and repeating arrangement of atoms or molecules, giving them characteristic geometric shapes.
Correct answer: Regular arrangement- A. Compressibility
- B. Young's modulus
- C. Bulk modulus
- D. Plastic modulus
Explanation: Bulk modulus is a measure of the resistance of a material to uniform compression, defined as the ratio of the infinitesimal change in…
Correct answer: Bulk modulus- A. Ductile substance
- B. Brittle substance
- C. Plastic substance
- D. All of these
Explanation: Ductile substances are materials that can undergo significant plastic deformation before breaking.
Correct answer: Ductile substance- A. Visible
- B. Infrared
- C. X-rays
- D. Ultraviolet
Explanation: X-ray crystallography is widely used to determine the atomic and molecular structure of crystalline solids.
Correct answer: X-rays- A. Double
- B. Half
- C. Four times
- D. None of these
Explanation: Stress applied is inversely proportional to the volume of the body so on doubling the stress volume will be reduced to half
Correct answer: Half- A. 1
- B. 0
- C. infinity
- D. 40
Explanation: Young's modulus (E) is a measure of a material's stiffness. It is defined as the ratio of stress (σ) to strain (ε):E = σ/εA perfectly…
Correct answer: infinity76. Aluminum is a
- A. Metal
- B. Non Metal
- C. Photo conductor
- D. Semiconductor
Explanation: Aluminum is a metal because it possesses all the characteristic properties of a metal.
Correct answer: Metal- A. Length is increased
- B. Length is decreased
- C. Length remains same
- D. None of these
Explanation: Strain is defined as the ratio of change in length to the original length.Strain = (Change in length)/ (Original length)If the change in…
Correct answer: Length is decreased- A. Holes
- B. electron
- C. No charge carriers
- D. Both a and b
Explanation: Extrinsic semiconductors are those whose conductivity is due to impurities. Extrinsic semiconductors are of two types: n-type and p-type.
Correct answer: Both a and b- A. Unidirectional
- B. Bidirectional
- C. Both a and b
- D. None of these
Explanation: Extrinsic semiconductors diodes are designed to allow current flow in only one direction.
Correct answer: Unidirectional- A. Newton meter squared
- B. Newton per meter squared
- C. Newton per meter cubed
- D. Newton meter cubed
Explanation: Pascal (Pa) is the SI unit of pressure. Pressure is defined as force per unit area.Force is measured in Newtons (N).Area is measured in…
Correct answer: Newton per meter squared