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 2 of 2
- A. Atoms
- B. Molecules
- C. Electrons
- D. Ions
Explanation: A is incorrect In metals atoms are not in combined form they are in electron pool type arrangementB is incorrect In metals molecules do…
Correct answer: Electrons- A. Negative temperature coefficients
- B. Positive temperature coefficients
- C. Both A and B
- D. None of the above
Explanation: Substances with a negative temperature coefficient of resistance, such as germanium and silicon, experience a decrease in resistance as…
Correct answer: Negative temperature coefficients- A. Graphite has a layered structure
- B. In graphite, all valence electrons are tetrahedrally bound
- C. In graphite one of valence electron is free to move
- D. Graphite is soft and greasy bound
Explanation: Graphite conducts electricity whereas diamond does not because in diamond the carbon atoms are bonded to other carbon atoms and all the…
Correct answer: In graphite one of valence electron is free to move- A. X = A.B
- B. B X = A + B
- C. X = Ā.B̄
- D. X = Ā + B̄
Explanation: The Boolean expression given for a NAND gate is that of logical addition and it is opposite to the AND gate The Boolean algebra for AND…
Correct answer: X = Ā.B̄- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: The NAND gate, or "NotAND" gate, is the combination of two basic logic gates, the AND gate, and the NOT gate, connected in series.
Correct answer: Option B- A. 11
- B. 10
- C. 1.1
- D. 0.11
Explanation: The formula used for the gain in non inverting amplifier is given as: 1+(Feedback resistance/resistance of other resistor)…
Correct answer: 1.1- A. Because electron movement decrease with the increase of temperature
- B. Because metal ions oscillations hinder electron movement
- C. Because electron direction changes at high temperature
- D. Because they pass heat current through collision of electrons
Explanation: The correct option is B because metal ion oscillations hinder electron movement.
Correct answer: Because metal ions oscillations hinder electron movement- A. Decrease in temperature
- B. Increase in current
- C. Increase in temperature
- D. Decrease in current
Explanation: In a pure semiconductor, the resistance decreases with an increase in temperature.
Correct answer: Increase in temperature- A. Large number of freely mobile electrons
- B. A large number of bound electrons
- C. A small number of free electrons
- D. A small number of bound electrons
Explanation: Metals are good conductors of electricity because they contain a large number of freely mobile electrons.
Correct answer: Large number of freely mobile electrons- A. Normal temperature
- B. Critical temperature
- C. Absolute temperature
- D. Curie temperature
Explanation: The temperature at which the resistance of a conductor approaches zero is called the critical temperature.
Correct answer: Critical temperature- A. Increases with light
- B. Decreases with light
- C. Decreases with darkness
- D. None of the above
Explanation: The correct answer is that the resistance of a Light Dependent Resistor (LDR) decreases with an increase in light intensity.
Correct answer: Decreases with light- A. Ionic bond
- B. Covalent bond
- C. Mutual bond
- D. Metallic bond
Explanation: A covalent bond is a chemical bond that involves the sharing of electrons to form electron pairs between atoms.
Correct answer: Covalent bond