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.
Last updated
320 questions · page 7 of 16
- A. Crystallography
- B. Rectification
- C. Intrinsic defects
- D. Doping
Explanation: Doping. The conductivity of semiconductors may easily be modified by introducing impurities into their crystal lattice.
Correct answer: Doping- A. Polymetric strain
- B. Crystalline strain
- C. Volumetric strain
- D. Equal strain
Explanation: The change in volume per unit volume is known as volumetric strain. It is a measure of how much the volume of a material changes in…
Correct answer: Volumetric strain- A. [ML2T-1]
- B. [ML-1T2]
- C. [ML-1T-2]
- D. [ML2T-3]
Explanation: The formula for Young's Modulus is:Where E is Young's Modulus/pressureσ is stress/ force per unit areaΜ is strain/ proportional…
Correct answer: [ML-1T-2]- A. Copper
- B. Iron
- C. Lead
- D. Glass
Explanation: A stress-strain curve is a graphical way to show the reaction of a material when a load is applied.
Correct answer: Glass- A. Compounds of silver
- B. Liquid metals
- C. Metallic alloys
- D. Electrolytes
Explanation: All metals and alloys of metals show a positive temperature coefficient. Electrolytes can have negative temperature coefficient.
Correct answer: Electrolytes- A. Silver
- B. Gold
- C. Selenium
- D. Mercury
Explanation: Photoconductivity is an optical and electrical phenomenon in which a material becomes more electrically conductive due to the absorption…
Correct answer: Selenium- A. Elastic Energy
- B. Potential Energy
- C. Plastic Energy
- D. Kinetic Energy
Explanation: For an object that is deformed energy as stored as the potential energy and is known as the Strain energy.Elastic energy is the energy…
Correct answer: Potential Energy- A. 1:4
- B. 1:2
- C. 1:1
- D. 2:1
Explanation: To determine the correct ratio, we can use the formula for the extension of a wire under an applied load, which is given by Hooke's…
Correct answer: 1:1- A. Modulus of elasticity
- B. Bulk Modulus
- C. Young's Modulus
- D. Shear Modulus
Explanation: Young's modulus is a measure of the stiffness of a material. It is defined as the ratio of tensile stress to tensile strain within the…
Correct answer: Young's Modulus130. A wire is stretched by a force 'F' which causes an extension ∆l, the energy stored in the wire is:
- A. F∆l
- B. 2F∆l
- C. ½ F∆l2
- D. ½ F∆l
Explanation: Given that, force applied = F . extension = ∆l and we assume the length of the wire to be = L.If the elastic limit is not exceeded then…
Correct answer: ½ F∆l- A. The extension of wire is proportional to force applied
- B. The cross-section area of the wire remains constant
- C. The wire is not stretched beyond its elastic limit
- D. The weight of wire is negligible
Explanation: The energy stored in the wire is potential energy, when the wire is extended proportionally to the force applied PE=½ kx2.
Correct answer: The extension of wire is proportional to force applied- A. Elasticity is that property of body which enables body to regain its original dimension
- B. Elasticity is that property of a body that does not allow it to return to its original shape
- C. Elasticity is that property of a body that allows it to retain its original shape and dimension after the stress is removed
- D. Elasticity is that property of a body that obeys Hooke's law
Explanation: Elasticity is the ability of a deformed material body to return to its original shape and size when the forces causing the deformation are…
Correct answer: Elasticity is that property of a body that allows it to retain its original shape and dimension after the stress is removed- A. A
- B. B
- C. C
- D. D
Explanation: X is a ductile object; Y is a brittle object and Z is a polymer these graphs are a factual recall
Correct answer: D- A. Area under graph
- B. Gradient of the graph
- C. Reciprocal of the gradient
- D. Product of gradient and area of the curve
Explanation: Young's modulus of elasticity (E), also known as the elastic modulus, is the ratio between stress and strain.
Correct answer: Reciprocal of the gradient- A. Proportional limit, yield limit, elastic limit
- B. Yield limit, elastic limit, proportional limit
- C. Proportional limit, elastic limit, yield limit
- D. Elastic limit, proportional limit, yield limit
Explanation: The following limits are deduced in the order; Proportional limit, elastic limit, yield limit.
Correct answer: Proportional limit, elastic limit, yield limit- A. 0.10 %
- B. 40 %
- C. 10 %
- D. 20 %
Explanation: Given:Original length = 4mChange in length = 40 cm = 0.4 mPercentage elongation = ?Formula:To calculate the percentage elongation, we need…
Correct answer: 10 %- A. 10 kJ m−3
- B. 100 kJ m−3
- C. 1.0 MJ m−3
- D. 10 MJ m−3
Explanation: To calculate the strain energy per unit volume (also known as strain energy density), you use the formula: strain energy per unit volume =…
Correct answer: 10 MJ m−3- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: Use the formula given:𝑥 =4𝑀𝑔𝑙 / 𝐸𝜋𝑑2
Correct answer: Option D- A. Melda's Apparatus
- B. Young's Apparatus
- C. Searle's Apparatus
- D. Cavendish Apparatus
Explanation: •Searle's apparatus is used for the measurement of Young's modulus. It consists of two equal-length wires that are attached to a rigid…
Correct answer: Searle's Apparatus- A. 𝐹𝐿/𝐴
- B. 𝐹𝐴/L
- C. F𝐿/𝜋𝑟2𝑙
- D. F𝑙/𝜋𝑟2L
Explanation: Young modulus=stress/strain FL/Al where l is the extension
Correct answer: F𝐿/𝜋𝑟2𝑙