Free Electrical Properties of Solids MCQs with Answers
32 Electrical Properties 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.
Electrical properties of solids depend on their band structure, charge carriers and conductivity. The topic compares conductors, insulators and semiconductors, relates resistivity to temperature, and covers intrinsic and extrinsic semiconductors, donor and acceptor impurities, electron and hole conduction, and the formation of p-type and n-type materials.
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32 questions · page 1 of 2
- 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 temperature8. 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.- A. Insulator
- B. Conductor
- C. Semiconductor
- D. Superconductor
Explanation: The correct answer is Insulator. Insulators have the largest energy gap among the given options, which prevents electrons from easily…
Correct answer: Insulator- A. Trivalent
- B. Tetravalent
- C. Pentavalent
- D. Monovalent
Explanation: The correct answer is Trivalent. Trivalent impurities, such as Boron, have three valence electrons.
Correct answer: Trivalent- A. The black material is good in radiation.
- B. The plastic is good insulator.
- C. The plastic is a good conductor.
- D. The plastic soften gradually with excessive heat.
Explanation: Cooking pots are provided with wooden or plastic handles because they are bad conductors of heat.
Correct answer: The plastic is good insulator.- A. It is attracted by magnet
- B. It is iron-like in nature
- C. It can be magnetized
- D. It is an alkali metal
Explanation: The explanation for this question will be added soon.
Correct answer: It can be magnetized- A. Increase in pressure
- B. Increase in temperature
- C. Decrease in temperature
- D. Decrease in pressure
Explanation: The electrical conductivity of metals decreases with an increase in temperature as with the increase in temperature, the positive metal…
Correct answer: Increase in temperature- A. Diamond
- B. Graphite
- C. Nail
- D. Iodine
Explanation: Graphite, C(s) can conduct electricity in a solid state. Graphite is a network solid and conducts electricity as it has delocalized…
Correct answer: Graphite- A. Germanium
- B. Silver
- C. Copper
- D. Platinum
Explanation: Resistivity (ρ), is resistance R of a specimen such as a wire, multiplied by its cross-sectional area A, and divided by its length 1ρ =…
Correct answer: GermaniumElectrical Properties of Solids MCQs: common questions
Are these Electrical Properties of Solids MCQs free?
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There are 32 Electrical Properties of Solids MCQs in the Physics bank, shown 20 to a page with the correct answer and an explanation on each.
Does every Electrical Properties of Solids MCQ have an explanation?
Yes. Each Electrical Properties of Solids question shows the correct option and a written explanation of why it is correct, so a wrong answer teaches you something rather than just being marked wrong.
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