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 16 of 16
- A. Amorphous substances have a sharp melting point
- B. Amorphous substances do not have a fixed melting point
- C. Amorphous substances have proper geometrical shapes
- D. The particles in amorphous substances are arranged in an orderly manner
Explanation: Amorphous solids, unlike crystalline solids, do not have a fixed melting point.
Correct answer: Amorphous substances do not have a fixed melting point- A. Coefficient of thermal expansion
- B. Lattice energy
- C. Viscosity
- D. Infrared spectroscopy
Explanation: Anisotropy is the property of a material which allows it to change or assume different properties in different directions so the correct…
Correct answer: Coefficient of thermal expansion- A. Diamond
- B. Graphite
- C. Glass
- D. Rock salt
Explanation: Glass is an isotropic material, meaning its properties are the same in all directions.
Correct answer: Glass- A. Stiffness of solids
- B. Strength of solid
- C. Ductility of solids
- D. Toughness of solid
Explanation: Strength measures how much stress can be applied to an element before it deforms permanently or fractures.
Correct answer: Strength of solid- A. Stiffness of solids
- B. Strength of solid
- C. Ductility of solids
- D. Toughness of solid
Explanation: Strength measures how much stress can be applied to an element before it deforms permanently or fractures.
Correct answer: Strength of solid- A. Elastic substances
- B. Inelastic substances
- C. Diamagnetic substances
- D. Ductile substances
Explanation: Elastic substances are materials that undergo deformation when subjected to small forces, but they can return to their original shape and…
Correct answer: Elastic substances- A. compressibility
- B. young's modulus
- C. bulk's modulus
- D. shear's modulus
Explanation: Compressibility is the ratio of volumetric strain to volumetric stress. It is the inverse of bulk's modulus. Its SI unit is the pascal.
Correct answer: compressibility- A. ductile substance
- B. brittle substance
- C. plastic substance
- D. all of these
Explanation: The substance which undergoes plastic deformation until it breaks is a DUCTILE SUBSTANCE. Therefore, option 'A' is correct.
Correct answer: ductile substance- A. k + 2
- B. k/2
- C. 2k
- D. k
Explanation: According to Hooke's Law, the force exerted by a spring is given by F = -kx, where k is the spring constant and x is the displacement.
Correct answer: 2k- A. 8.0N
- B. 28N
- C. 160N
- D. 400N
Explanation: According to Hooke's Law, the force F exerted by a spring is directly proportional to the displacement x from its equilibrium position…
Correct answer: 8.0N- A. 8.0N
- B. 28N
- C. 160N
- D. 400N
Explanation: In order to find the displacement x we subtract the untstrected length from the overall length.
Correct answer: 8.0N- A. Decrease in temperature
- B. Increase in current
- C. Increase in temperature
- D. Decrease in current
Explanation: In a pure semiconductor, the resistance decreases with an increase in temperature.
Correct answer: Increase in temperature- A. Large number of freely mobile electrons
- B. A large number of bound electrons
- C. A small number of free electrons
- D. A small number of bound electrons
Explanation: Metals are good conductors of electricity because they contain a large number of freely mobile electrons.
Correct answer: Large number of freely mobile electrons- A. Normal temperature
- B. Critical temperature
- C. Absolute temperature
- D. Curie temperature
Explanation: The temperature at which the resistance of a conductor approaches zero is called the critical temperature.
Correct answer: Critical temperature- A. Increases with light
- B. Decreases with light
- C. Decreases with darkness
- D. None of the above
Explanation: The correct answer is that the resistance of a Light Dependent Resistor (LDR) decreases with an increase in light intensity.
Correct answer: Decreases with light- A. Ionic bond
- B. Covalent bond
- C. Mutual bond
- D. Metallic bond
Explanation: A covalent bond is a chemical bond that involves the sharing of electrons to form electron pairs between atoms.
Correct answer: Covalent bond- A. Force and displacement
- B. Force and extension
- C. Force and compression
- D. Stress and strain
Explanation: Hooke's Law is a principle of physics that states the strain in a solid is proportional to the applied stress within the elastic limit of…
Correct answer: Stress and strain- A. 1/1
- B. 1
- C. 2
- D. 4
Explanation: Since the wires at made of the same material, their young modulus will be the same hence they have the same length, force and area.
Correct answer: 1/1- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: The shear modulus of elasticity/rigidity G is a material's ability to resist deformation, it is defined as the ratio of tangential stress…
Correct answer: Option C320. Which one of the following physical quantity does not have the dimension of force per unit area:
- A. Stress
- B. Strain
- C. Young modulus
- D. Pressure
Explanation: The strain unit is dimensionless. It is the ratio between the length shift and the initial length, so it is unit-less.
Correct answer: Strain