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 12 of 16
- A. 1 : 9
- B. 9 : 1
- C. 1 : 27
- D. 27 : 1
Explanation: The force ratio F1/F2 can be determined by considering the equation for the force required to cause a certain extension in a wire, which…
Correct answer: 27 : 1- A. 4 x 10^5N
- B. 2 x 10^5N
- C. 1 x 10^5N
- D. None
Explanation: The breaking strength of a wire is directly proportional to its cross-sectional area.
Correct answer: 1 x 10^5N- A. 2K
- B. 3K
- C. 3/2 K
- D. 1/2 K
Explanation: When a spring is cut into parts, the spring constant for each part changes based on its length.
Correct answer: 3/2 K- A. 2 : 1
- B. 1 : 4
- C. 1 : 8
- D. 8 : 1
Explanation: To determine the ratio of increase in length for wires A and B, we use the formula for elongation: ΔL = (F*L)/(A*Y), where F is the force…
Correct answer: 1 : 8- A. Y/2
- B. Y
- C. 2Y
- D. 4Y
Explanation: The Young's modulus (Y) is an intrinsic property of a material that describes its stiffness, and it is independent of the dimensions, such…
Correct answer: Y226. Hook's law defines
- A. Stress
- B. Strain
- C. Modulus of elasticity
- D. Elastic limit
Explanation: Hooke's law states that the strain in a solid is proportional to the applied stress within the elastic limit of that solid.
Correct answer: Modulus of elasticity- A. Decreases
- B. Increases
- C. Remains constant
- D. Becomes zero
Explanation: The modulus of elasticity, also known as Young's modulus, measures a material's resistance to deformation.
Correct answer: Decreases- A. 6 mm
- B. 3 mm
- C. 24 mm
- D. 48 mm
Explanation: The increase in length of a wire under a load is given by the formula ΔL = (F*L) / (A*Y), where F is the force, L is the original length…
Correct answer: 3 mm- A. l
- B. 2l
- C. l/2
- D. None of the above
Explanation: When the length of the wire is halved, the increase in its length (strain) under the same force will also be halved.
Correct answer: l/2- A. Half load
- B. Same load
- C. Double load
- D. One fourth
Explanation: The load a wire can support is directly related to its cross-sectional area.
Correct answer: Double load- A. Copper is more costly than steel
- B. Copper is more elastic than steel
- C. Steel is more elastic than copper
- D. None of the above
Explanation: The primary reason for using steel over copper in making springs is steel's superior elasticity.
Correct answer: Steel is more elastic than copper- A. n2 times
- B. nt times
- C. 2n times
- D. None of the above
Explanation: When a load is applied to a wire, the elongation is given by the formula ΔL = (F × L) / (A × Y), where F is the force, L is the original…
Correct answer: n2 times- A. Equal to that of rubber
- B. Less than that of the rubber
- C. More than that of the rubber
- D. None of the above
Explanation: When identical wires of rubber and iron are stretched by the same weight, the number of atoms in the iron wire will be more than that in…
Correct answer: More than that of the rubber- A. Nature of the material
- B. Radius of the wire
- C. Length of the wire
- D. None of the above
Explanation: The force constant of a wire is influenced by the nature of the material, the radius of the wire, and its length.
Correct answer: None of the above- A. Gases
- B. Fluids
- C. Solids
- D. Liquids
Explanation: Longitudinal strain is a type of deformation that occurs when a solid is stretched or compressed along its length.
Correct answer: Solids- A. Increases
- B. Decreases
- C. First increases then decreases
- D. First decreases then increases
Explanation: Young's modulus is a measure of the stiffness of a solid material. It is defined as the ratio of stress (force per unit area) to strain…
Correct answer: Increases- A. Solid
- B. Solid but powder
- C. Gas
- D. None of the above
Explanation: Young's modulus measures a material's stiffness, or its ability to resist deformation.
Correct answer: Gas- A. Hooke's law is applicable only within the elastic limit
- B. The adiabatic and isothermal elastic constants of a gas are equal
- C. Young's modulus is dimensionless
- D. Can't be predicted
Explanation: Option A is correct because Hooke's law is valid only within the elastic limit of a material, meaning the material will return to its…
Correct answer: Hooke's law is applicable only within the elastic limit- A. Length of the wire
- B. Radius of the wire
- C. Material of the wire
- D. Shape of the cross section
Explanation: The breaking stress of a wire is a measure of the maximum stress that the material can withstand before failure.
Correct answer: Material of the wire- A. 500 N
- B. 1000 N
- C. 10000 N
- D. 4000 N
Explanation: The breaking tension of a wire is proportional to its cross-sectional area, which for a circular wire is given by the formula: Area =…
Correct answer: 4000 N