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 8 of 16
- A. No internal frictional force
- B. Independent of coordinates
- C. Independent of time
- D. Its density remains constant
- E. Its density remains variable
Explanation: When a fluid is incompressible, it means, its volume or density does not change with changes in pressure.
Correct answer: Its density remains constant- A. 33.12 MPa
- B. 44.12 MPa
- C. 66.15 MPa
- D. 77.29 MPa
- E. 88.46 MPa
Explanation: To find the stress in the wire, we use the formula Stress = Force / Area. The force applied is 10,000 N.
Correct answer: 88.46 MPa- A. 390 nm
- B. 590 nm
- C. 690 nm
- D. 790 nm
- E. 990 nm
Explanation: Given:Distance between the slits (d) = 0.25 cm = 0.0025 mDistance to the screen (L) = 100 cm = 1 mDistance of the third dark fringe from…
Correct answer: 590 nm- A. Steel
- B. Glass
- C. Copper
- D. Rubber
Explanation: Rubber is a highly elastic material that can undergo significant deformation under applied forces.
Correct answer: Rubber- A. Bulk Modulus
- B. Shear Modulus
- C. Tensile modulus
- D. Young's Modulus
Explanation: Within the elastic limit, the ratio of volumetric stress to the corresponding volumetric strain in a body is always constant, which is…
Correct answer: Bulk Modulus- A. A
- B. B
- C. C
- D. D
Explanation: In terms of doping, an n-type semiconductor is created by introducing impurities into a pure semiconductor material that provides extra…
Correct answer: B- A. A
- B. B
- C. C
- D. D
Explanation: Point C represents the ultimate strength of the material. It is the point where the material reaches its maximum stress before fracturing…
Correct answer: C- A. Force
- B. Product of frequency and wavelength
- C. Co-efficient of viscosity
- D. Refractive index
Explanation: The correct answer is the product of frequency and wavelength. This relationship arises from the wave equation, where the speed of sound…
Correct answer: Product of frequency and wavelength- A. 1K
- B. K/2
- C. K/3
- D. 3K
- E. 4K
Explanation: When a spring is cut into segments, the spring constant of each segment remains the same.
Correct answer: 3K- A. nV
- B. V/n
- C. n2 V
- D. V/n2
Explanation: The potential energy stored in a spring that is stretched by a distance x is given by the formula: V = ½ kx² In this case, the potential…
Correct answer: n2 V- A. Trivalent element
- B. Four group element
- C. Second group element
- D. Pentavalent element
Explanation: When a few atoms of trivalent dopant replace silicon atoms in the lattice, a vacant state (or electron "hole") is created and can act as…
Correct answer: Trivalent element- A. 33.12 MPa
- B. 44.12 MPa
- C. 66.15 MPa
- D. 77.29 MPa
- E. 88.46 MPa
Explanation: Stress (σ) = Force (F) / Area (A)Area (A) = π * (diameter/2)^2Area (A) = π * (12mm/2)^2Area (A) = π * (6mm)^2σ = 10000/ 3.14 (6 * 10-3)2σ…
Correct answer: 88.46 MPa- A. 90 nm
- B. 590 nm
- C. 690 nm
- D. 790 nm
- E. 990 nm
Explanation: Given:Distance between the slits (d) = 0.25 cm = 0.0025 mDistance to the screen (L) = 100 cm = 1 mDistance of the third dark fringe from…
Correct answer: 590 nm- A. I only
- B. II only
- C. III only
- D. I and II only
- E. I, II and III
Explanation: All of these statements are correct about the kinetic molecular theory of gases which tells us about the mathematical model of gas.1.
Correct answer: I, II and III- A. Bulk modulus
- B. Shear modulus
- C. Elastic modulus
- D. Young's modulus
Explanation: The ratio of volumetric stress to volumetric strain is known as the bulk modulus.
Correct answer: Bulk modulus- A. A
- B. B
- C. C
- D. D
Explanation: In terms of doping, an n-type semiconductor is created by introducing impurities into a pure semiconductor material that provides extra…
Correct answer: B- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: The capillary rise is given by, h=2Tcosθ/ρrg ...(i). The soap solution and water both wet the side of the capillary tube.
Correct answer: Option B- A. Tapered end
- B. Wider end
- C. In any direction
- D. No tendency to move
Explanation: The correct answer is a)Tapered end. The water drop will tend to move towards the tapered end of the conical pipe.
Correct answer: Tapered end- A. Friction
- B. Adhesive molecular force
- C. Cohesive molecular force
- D. Barnoulli's theorem
Explanation: Viscosity and friction share similarities. Viscosity is a measure of a fluid's resistance to flow, primarily due to internal friction…
Correct answer: Friction- A. Increases
- B. Decreases
- C. Remain same
- D. None
Explanation: This is the correct answer. An increase in temperature causes the molecules in a liquid to gain more kinetic energy and move more rapidly.
Correct answer: Decreases