Wave and Electromagnetism

Vocabulary flashcards based on the Year 9 Science unit on Wave and Electromagnetism, covering heat transfer, wave properties, and magnetic field rules.

Conduction

A method of energy transfer through different media where heat is transferred through direct particle contact.

Convection

A method of heat transfer resulting from different density of particles as a result of varying kinetic energy in hot and cold matters.

Radiation

A method of energy transfer that requires no medium to travel through.

Temperature

The measure of the average kinetic energy of the particles within a substance.

Transverse wave

A type of wave where the particle displacement is perpendicular to the direction of wave propagation.

Longitudinal wave

A type of wave where the particle displacement is parallel to the direction of wave propagation.

Wave Speed Formula

v = f \times \text{\lambda}

Pitch

A quality of a sound wave that is determined by its frequency.

Loudness

A quality of a sound wave that is determined by its amplitude.

Electromagnetic radiation

Energy transfer that can be described using wave and particle models.

Compass

A device used to recall the direction of a magnetic field, as it points in the direction of the field.

Soft iron

A type of iron used as a core in solenoids because it is easily magnetized and demagnetized.

Hard iron

A type of iron that retains its magnetism longer than soft iron.

Right hand grip rule

A rule used to indicate or draw the magnetic field or current direction around a current carrying wire.

Electromagnet

A device where a magnetic field is produced by an electric current, often involving a coil of wire.

Right hand solenoid rule

A rule used to predict the North ($N$) or South ($S$) pole and draw the magnetic field around a solenoid.

Soft iron core

A component used inside a solenoid to increase the strength of the magnetic field.

Alternating current (AC)

Electricity generated using magnets via turbines turned by wind, water, tides, or steam.