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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- A. Amorphous
- B. Crystalline
- C. Polycrystalline
- D. Quartz
Explanation: The materials in which the disordered structure of a liquid is frozen are typically referred to as amorphous solids.
Correct answer: Amorphous- A. metallic solid.
- B. polymeric solid.
- C. crystalline solid.
- D. amorphous solid.
Explanation: Here's an explanation: * D) Amorphous solid: An amorphous solid is considered an intermediate structure between a solid and a liquid…
Correct answer: amorphous solid.- A. glassy solids
- B. polymeric solids
- C. crystalline solids
- D. amorphous solids
Explanation: Nylon is classified as an amorphous solid because its molecular chains are arranged in a random or disordered manner, unlike the highly…
Correct answer: amorphous solids- A. I only.
- B. II only.
- C. I and III.
- D. II and III.
Explanation: The correct answer is I only. Amorphous solids are characterized by an irregular arrangement of molecules, which causes them to break into…
Correct answer: I only.- A. Elastic
- B. Hard
- C. Ductile
- D. Brittle
Explanation: A body that breaks down immediately after crossing the elastic limit is known as brittle.
Correct answer: Brittle- A. 0.333 m
- B. 0.666 m
- C. 3 m
- D. 6 m
Explanation: The correct answer is 0.333 m. When a weight is attached to the spring, it exerts a force on the spring, causing it to extend.
Correct answer: 0.333 m- A. Bulk modulus.
- B. Shear modulus.
- C. Young's modulus.
- D. Modulus of plasticity.
Explanation: The correct concept for the ratio between applied stress and volumetric strain is the bulk modulus.
Correct answer: Bulk modulus.- A. Absolute temperature
- B. Kelvin temperature
- C. Limiting temperature
- D. Critical temperature
Explanation: The temperature below which the resistivity of a superconductor falls to zero is called the critical temperature or transition…
Correct answer: Critical temperature- A. metal
- B. Photoconductor
- C. Non metal
- D. Semi conductor
Explanation: Here is the explanation of the correct optionAluminium is a metal
Correct answer: metal- A. Number of electrons increases while that of holes decreases.
- B. Number of holes increases while that of electrons decreases
- C. Number of electrons and holes remains the same.
- D. Number of electrons and holes increases equally
Explanation: When an N-type semiconductor is heated, electrons gain energy and can move more freely, resulting in increased electrical conductivity.
Correct answer: Number of electrons and holes increases equally- A. Electrons move from base to collector
- B. Holes move from emitter to base
- C. Electrons move from collector to base
- D. Holes move from base to emitter
Explanation: In an NPN transistor used as an amplifier, the majority charge carriers are electrons, which flow from the N-type emitter into the P-type…
Correct answer: Electrons move from base to collector- A. Decreases
- B. Increases
- C. Constant
- D. Not affected
Explanation: In semiconductors, increasing the temperature provides additional energy to electrons, enabling more of them to break free and become…
Correct answer: Increases- A. Emitter-base
- B. Collector-base
- C. Emitter-collector
- D. None of these
Explanation: The correct answer is Option B: Collector-base. In a transistor, the collector-base junction must be reverse biased to ensure that the…
Correct answer: Collector-base- A. Road temperature
- B. Hall temperature
- C. Room temperature
- D. None of these
Explanation: At room temperature (usually around 20-25°C or 68-77°F), both pair production and intrinsic conductivity in semiconductors are relatively…
Correct answer: Room temperature15. The germanium or silicon crystal formed after adding pentavalent impurity is known as _ substances.
- A. N-type
- B. S-type
- C. Q-type
- D. None of these
Explanation: We can gain an N-type semiconductor by adding pentavalent impurities such as phosphorus or arsenic.
Correct answer: N-type- A. Chemical energy into electrical energy
- B. Light energy into electrical energy
- C. Electrical energy into light energy
- D. Chemical energy into light energy
Explanation: A solar cell, also known as a photovoltaic cell, is a device that converts light energy, typically from sunlight, directly into electrical…
Correct answer: Light energy into electrical energy- A. Complete valence band
- B. Partially filled conduction band
- C. Tightly bounded valence electrons
- D. Large energy gapped between electrons
Explanation: Electromagnetic waves are characterized by the oscillation of electric and magnetic fields propagating through space, such as visible…
Correct answer: Large energy gapped between electrons- A. I only.
- B. III only.
- C. I and II.
- D. II and III.
Explanation: Diamagnetic substances are those in which the atoms do not possess a permanent magnetic dipole moment.
Correct answer: II and III.- A. partially filled valence band.
- B. partially filled conduction band
- C. plenty of free electrons for electrical conduction
- D. narrow forbidden energy gap between conduction and valence band
Explanation: Semiconductor materials at room temperature do not have a partially filled conduction band, as this would indicate metallic behavior.
Correct answer: partially filled valence band.- A. I and III.
- B. I and IV.
- C. II and III.
- D. II and IV.
Explanation: The correct answer is Option B: I and IV. Conductivity in semiconductors increases with temperature because thermal energy excites more…
Correct answer: I and IV.Physics of Solids MCQs: common questions
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