MCQs on Conductors and insulators

MCQs on Conductors and insulators

Q1: Which of the following is the most conductive element?

1. Copper
2. Iron
3. Silicon
4. Silver

Answer:(d) Silver

Q2: A material that has zero resistance is called

1. Insulator
2. Conductor
3. Superconductor
4. semiconductor

Answer:(c) Superconductors

Q3: Why is copper a preferred choice in making electrical wires?

1. Copper is a good conductor of electricity
2. Poor conductors of electricity
3. Insulators
4. Superconductors

Answer:(a) Copper is a good conductor of electricity

Q4: Which among the following is not an insulator?

1. Wool
2. Plastic
3. Silver
4. Paper

Answer:(c) Silver

Q5: What is the inverse of resistance called?

1. Inductance
2. Conductance
3. Resistivity
4. permittivity

Answer:(b) Conductance

Q6: The energy gap is maximum in

1. Conductors
2. Semiconductors
3. Insulators
4. Superconductors

Answer:(c) Insulators

Q7: Conductors are materials that allow

1. Allow the flow of heat
2. Does not allow heat to flow
3. Allows cold to flow
4. Stops cold from passing through

Answer: (a) Allow the flow of heat

Q8: Good conductors have many loosely bound

1. Atoms
2. Protons
3. Molecules
4. Electrons

Answer:(d) Electrons

Q9: The resistance of the conductor is directly proportional to

1. Length
2. Area of cross-section
3. Temperature
4. resistivity

Answer: (a) Length

Q10: With the increase in temperature the resistance of semiconductors

1. Decreases
2. Increases
3. Remains constant
4. Initially increases and then decreases

Answer: (a) Decreases

Q11: Which of the following is an insulator?

1. Brass
2. Copper
3. Gold
4. Glass

Answer:(d) Glass