Question

Apply the concept of superconductivity to explain the disappearance of electrical resistance. The application that best demonstrates this principle is:

• A. High-power transmission lines
• B. Portable electronic devices
• C. Solar panels
• D. Incandescent light bulbs

Hint:

Superconductors = zero resistance. So where power loss matters most — like transmission lines — they shine!

Answer 1

The Correct Option is A

Superconductivity is a quantum mechanical phenomenon where certain materials exhibit exactly zero electrical resistance below a critical temperature.
Why High-Power Transmission Lines Are the Best Application:

• In standard power transmission, a significant amount of electrical energy is lost as heat due to resistance in conductors.
• Superconducting transmission lines eliminate this loss, allowing electricity to flow without resistance.
• This greatly improves efficiency, especially over long distances and high currents.
• These lines are used in special applications like magnetic levitation trains and high-capacity power grids.

Why the Other Options Are Incorrect:

• (B) Portable electronic devices: These prioritize low power usage and miniaturization; superconductivity is not commonly used due to cooling requirements.
• (C) Solar panels: Related to photoelectric conversion, not superconductivity.
• (D) Incandescent light bulbs: Operate via resistive heating — the exact opposite of superconductivity.

Thus, the application that best demonstrates the elimination of electrical resistance via superconductivity is high-power transmission lines.