Conductor and Conductance MCQs

21. Which of the following is a conductor?

• A) Glass
• B) Plastic
• C) Rubber
• D) Aluminum
• Answer: D

22. The ability of a material to conduct electric current is known as:

• A) Resistance
• B) Conductance
• C) Voltage
• D) Power
• Answer: B

23. Which material has free electrons that allow it to conduct electricity?

• A) Wood
• B) Rubber
• C) Copper
• D) Paper
• Answer: C

24. As the length of a conductor increases, its conductance:

• A) Increases
• B) Decreases
• C) Remains the same
• D) Doubles
• Answer: B

25. Which of the following factors increases the conductance of a metallic conductor?

• A) Increasing its temperature
• B) Increasing its length
• C) Increasing its cross-sectional area
• D) Decreasing its cross-sectional area
• Answer: C

26. Conductors have:

• A) High resistance
• B) Low resistance
• C) No resistance
• D) Infinite resistance
• Answer: B

27. Which material is used for overhead power transmission lines due to its high conductivity?

• A) Steel
• B) Iron
• C) Aluminum
• D) Copper
• Answer: C

28. The conductance of a metallic conductor depends on:

• A) The type of metal
• B) The temperature
• C) The length and area of the conductor
• D) All of the above
• Answer: D

29. If the resistivity of a material decreases, its conductance:

• A) Increases
• B) Decreases
• C) Remains the same
• D) Doubles
• Answer: A

30. The ratio of current to voltage in a conductor is called:

• A) Resistance
• B) Conductance
• C) Capacitance
• D) Inductance
• Answer: B