The battery of my smartphone has run out.

In this area, electric power generation using solar energy is being carried out.

The light bulb in the room has burned out.

The gearing of this bicycle is very smooth.

This electric wire is an excellent conductor, transmitting electricity efficiently.

This machine takes energy from the power source and operates by transmitting it.

A large amount of electric current is flowing through this power line.

In this experiment, energy is measured in electron volts.

Which electrode of this battery is positive and which is negative?

He collected metal fragments using an electromagnet.