Conductors and Insulators of Electricity

Electrical wires are usually made by copper. Which properties of copper make it a suitable choice-

I) High electrical conductivity
II) Sonority
III) Ductility
IV) Metallic lustre

The critical temperature for superconductors is the temperature at which the electrical resistivity of a metal

Conductivity of superconductors is

The super conductors are used to levitate trains from the track.

What is critical temperature? Explain its importance in superconductors.

What are Superconductors?

At critical temperature, a metal offers _____ resistance to the passage of electricity.

The temperature below which a conductor offers no resistance to the flow of electric current is known as its critical temperature.

Superconductors are

Cotyledons are also called-

Assertion: The super-conductors are used for the transmission of electric power.

Reason: The resistance of super-conductor is zero.

Assertion: The resistance of a superconductor is zero.

Reason: Superconductors are used for the transmission of electric power.

In the adjoining figure, the reading of ammeter $A$ is not zero, while that of voltmeter $V$ is zero. The substance $C$ is,

Identify the incorrect statement regarding a superconducting wire.

Identify the incorrect statement regarding a superconducting wire.