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 14 of 16
- A. Iron
- B. Nickel
- C. Copper
- D. All of the above
Explanation: Magnets are typically made from materials that exhibit ferromagnetism, such as iron and nickel, because they have unpaired electrons that…
Correct answer: Copper- A. Rough handling
- B. Heating
- C. Magnetizing in the opposite direction
- D. All of the above
Explanation: Demagnetisation of a magnet can occur through various methods that disrupt the alignment of its magnetic domains.
Correct answer: All of the above263. A ferromagnetic material is heated above its curie temperature. Which one is a correct statement
- A. Ferromagnetic domains are perfectly arranged
- B. Ferromagnetic domains become random
- C. Ferromagnetic domains are not influenced
- D. Ferromagnetic material changes itself into diamagnetic material
Explanation: When a ferromagnetic material is heated above its Curie temperature, the thermal energy overcomes the magnetic energy that keeps the…
Correct answer: Ferromagnetic domains become random- A. Attracted by the poles
- B. Repelled by the poles
- C. Repelled by the north-pole and attracted by the south pole
- D. Attracted by the north pole and repelled by the south pole
Explanation: Diamagnetic substances are characterised by their ability to create a weak magnetic field in opposition to an externally applied magnetic…
Correct answer: Repelled by the poles- A. Diamagnetic substance
- B. Paramagnetic substance
- C. Ferromagnetic substance
- D. All of these
Explanation: Magnetic permeability is a measure of how easily a material can become magnetised or enhance an external magnetic field.
Correct answer: Ferromagnetic substance- A. Diamagnetism is temperature dependent
- B. Paramagnetism is temperature dependent
- C. Paramagnetism is temperature independent
- D. None of these
Explanation: Paramagnetism is temperature-dependent, which is explained by Curie's law.
Correct answer: Paramagnetism is temperature dependent- A. Feebly attracted by magnets
- B. Strongly attracted by magnets
- C. Feebly repelled by magnets
- D. Strongly repelled by magnets
Explanation: Diamagnetic substances are materials that create an induced magnetic field in a direction opposite to an externally applied magnetic field…
Correct answer: Feebly repelled by magnets- A. Ferrimagnetism
- B. Ferromagnetism
- C. Paramagnetism
- D. Diamagnetism
Explanation: Superconductors exhibit perfect diamagnetism, a phenomenon known as the Meissner effect, where they completely expel magnetic fields from…
Correct answer: Diamagnetism- A. Largely increases
- B. Slightly increases
- C. Largely decreases
- D. Slightly decreases
Explanation: Inserting a ferromagnetic material into a current-carrying solenoid largely increases the magnetic field inside.
Correct answer: Largely increases270. In the hysteresis cycle, the value of H needed to make the intensity of magnetization zero is called
- A. Retentivity
- B. Coercive force
- C. Lorentz force
- D. None of the above
Explanation: The correct answer is Coercive force. In the hysteresis cycle, the coercive force is the measure of the resistance of a ferromagnetic…
Correct answer: Coercive force- A. inerease
- B. Deerease
- C. Remains the same
- D. Be doubled
Explanation: When the length ( L ) and radius ( r ) of a rod are doubled, the new length and radius are ( 2L ) and ( 2r ) respectively.
Correct answer: Remains the same- A. 1.5 x 10^5Nm- 2
- B. 2.5 x 10^5Nm- 2
- C. 2.5 x 10^3Nm- 2
- D. 1 x 10^5Nm- 2
Explanation: We use the formula: σ= F/A Given:Force (F) = 500 NDiameter of the rod = 50 cm = 0.5 mThe cross-sectional area of a cylinder is calculated…
Correct answer: 2.5 x 10^3Nm- 2- A. 20 x 10^9N/m2
- B. 3.9 x 10^-9N/m2
- C. 2 x 10^11N/m2
- D. 1.5 x 10^9N/m2
Explanation: The young modulus of steel is 20×1010 Pa which is 20×109N/m2.
Correct answer: 20 x 10^9N/m2- A. 0.5
- B. 4
- C. 3
- D. 1
Explanation: As, Strain= ΔL/Lwhere, ΔL=4L-L=3LSo, the strain is: Strain= ΔL/L =3L/L =3So, the strain is 3.
Correct answer: 3- A. increase.
- B. decrease.
- C. become zero.
- D. remain constant.
Explanation: A higher shear modulus indicates that a material is more resistant to shear deformation.
Correct answer: increase.- A. Metamorphic
- B. Sedimentary
- C. Igneous
- D. Both Options A and B are correct
Explanation: Option A; Metamorphic rocks started out as some other type of rock, but have been substantially changed from their original igneous…
Correct answer: Igneous- A. Refraction
- B. Crystallization
- C. Volatilization
- D. Dispersion
Explanation: Ancient glass, an amorphous solid, undergoes alternate heating due to exposure to the sun during the day and cooling at night and is…
Correct answer: Crystallization- A. Glass
- B. Diamond
- C. Silica
- D. Carbon
Explanation: Amorphous solids have the tendency to flow slowly. It does not form a crystalline solid structure as particles in solids do not move but…
Correct answer: Glass- A. Brittle only
- B. Elastic only
- C. Plastic Only
- D. Both brittle and elastic
Explanation: For stresses beyond the elastic limit, a material exhibits plastic behaviour.
Correct answer: Plastic Only280. The force applied on unit area to produce any change in the volume or length of a body is called:
- A. Strain
- B. Stress
- C. Elasticity
- D. Equilibrium
Explanation: When the force applied produces a change in length or volume of the object then is it called stress, otherwise the term strain is used.
Correct answer: Stress