Conductor and Conductance MCQs

41. The conductance of a conductor is affected by its:

• A) Temperature
• B) Length
• C) Cross-sectional area
• D) All of the above
• Answer: D

42. Which material is commonly used in electric circuits for connecting components due to its high conductivity?

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

43. Which of the following is NOT a characteristic of a good conductor?

• A) Low resistivity
• B) High thermal conductivity
• C) High resistance
• D) High electrical conductance
• Answer: C

44. When a conductor is placed in an electric field, what happens to the free electrons?

• A) They move randomly
• B) They align themselves
• C) They flow towards the positive terminal
• D) They remain stationary
• Answer: C

45. Which of the following is an application of conductors in everyday life?

• A) Insulation of wires
• B) Construction of electric circuits
• C) Preventing the flow of current
• D) Storing electric charge
• Answer: B

46. The resistivity of a conductor depends on its:

• A) Length
• B) Cross-sectional area
• C) Temperature
• D) Material
• Answer: D

47. Which of the following is a perfect conductor at very low temperatures?

• A) Copper
• B) Silver
• C) Superconductors
• D) Aluminum
• Answer: C

48. The resistance of a wire is directly proportional to its:

• A) Length
• B) Area of cross-section
• C) Conductance
• D) Voltage
• Answer: A

49. Which of the following has the highest conductance?

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

50. Conductors allow the flow of electric current due to the presence of:

• A) Protons
• B) Neutrons
• C) Free electrons
• D) Ions
• Answer: C