Electric Current

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

Which of the following is SI unit of electric current flowing in a circuit.

How do you measure AC current?

Current is always measure in series.

What are two ways to measure current in circuit?

When does a normal conductor become a superconductor?

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

When $2$ coulomb of charge, flows through a circuit for $10$ seconds, calculate the current in ampere? 

A current of $5 \mathrm{A}$ flows in a circuit. How much charge (in coulomb) passes through a point in $50 \mathrm{s}$?

When $2$ coulomb of charge, flows through a circuit for $10$ seconds, calculate the current in amperes?

The SI unit of electric current is -

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

Superconductors are

What is superconductivity?

If one coulomb of charge is flowing in one minute, it is called ‘ampere’.

Which one of the following devices is used to measure electric current?

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.