Electrical current
The flow of electric charge around a circuit.
What is an electric current?
This safety device melts if too much current flows through a circuit.
What is a fuse?
This invisible region around a magnet is where magnetic forces can act.
What is a magnetic field?
These transfer energy from one place to another without transferring matter.
What are waves?
Light, radio waves, and X-rays are all examples of this.
What are electromagnetic waves?
This unit is used to measure electric current.
What is an amp?
The cable that carries electrical current into an appliance.
What is the live wire?
The two ends of a magnet are called these.
What are the north and south poles?
This wave is produced by vibrating objects and is used for hearing.
What is a sound wave?
These electromagnetic waves have the longest wavelength and are used for broadcasting and communication.
What are radio waves?
This component can be opened or closed to stop or allow the flow of current in a circuit.
What is a switch?
This wire provides a safe path for current if there is a fault.
What is the earth wire?
When two like poles are brought together, this happens.
What is repulsion?
The distance between one wave peak and the next peak is called this.
What is wavelength?
This part of the electromagnetic spectrum can be detected by the human eye.
What is visible light?
Materials such as copper that allow electric current to pass through them easily.
What are conductors?
Brown, blue, green and yellow
What are the colours of the live, neutral and earth wires?
This type of magnet is made by passing an electric current through a coil of wire.
What is an electromagnet?
The number of waves passing a point each second is called this.
What is frequency?
These electromagnetic waves are used to produce images of bones inside the body.
What are X-rays?
This device is connected in series to measure the current in a circuit.
What is an ammeter?
The amount of energy an electrical appliance uses is measured in this unit.
What is a kilowatt-hour (kWh)?
Number of turns or voltage.
What can be increased to make an electromagnet stronger?
v = f x λ
What is the wave speed equation?
Radio waves, microwaves, infrared radiation, visible light, ultraviolet, X-rays, gamma rays.
What is the order of waves in the electromagnetic spectrum, longest wavelength/smallest frequency first?