Across
- 2. A liquid or a gas.
- 3. A single unit to supply energy to a circuit (many cells combine to form a battery).
- 5. An object or type of material (usually metal) that allows the flow of an electrical current or heat in one or more directions.
- 8. Electric current that oscillates backwards and forwards rather than travelling in one direction. In Australia the oscillations occur at a rate of 50 Hz; in the US at 60 Hz. AC is used for long distance transmission of electrical power and is what is provided from all household power supplies.
- 11. A material that does not readily allow heat or electrons to pass through it.
- 13. A minute portion of matter.
- 16. A statement made before an investigation, suggesting your ideas about the outcome.
- 18. Substance preventing transfer of heat or electricity.
- 20. wave velocity = frequency x wavelength.
- 21. A device to supply electrical energy from chemical energy.
- 24. The capacity to do work.
- 25. The energy drop between two points. In electronics, the difference in electrical energy across a device. Also called voltage.
- 28. A sequence.
- 29. A device to measure current.
- 30. The distance between two points on a wave that are moving in phase. Unit: metres.
- 32. A closed loop.
- 33. A continuous disturbance of particles that transfers energy.
- 34. A representation of the real world.
Down
- 1. A small fundamental particle with a negative charge.
- 4. Electrical connectors.
- 6. The process by which heat or electricity is transmitted through a substance when there is a difference of temperature or of electrical potential between adjoining regions, without movement of the substance.
- 7. The connection of a device to the Earth to prevent build up of charge.
- 9. A physical quantity of either positive or negative value.
- 10. Moving
- 12. A device that connects an electrical lead to a solid object.
- 14. The process of energy transfer through movement of particles (in gas or liquid form).
- 15. The flow of electrons in a circuit. Current is measured in amperes, or amps (A).
- 17. The number of complete cycles in one second. Unit: hertz.
- 19. The act of removing energy from a system.
- 22. the energy possessed by an object due to the collective movement of particles within the object.
- 23. The ratio of mass and volume of an object.
- 26. The maximum displacement from an equilibrium position (middle to crest in a wave).
- 27. A flexible strand of metal used to make an electrical circuit.
- 31. A quantity that can be altered or controlled.
- 35. electric current that travels only in one direction. Electric cells and batteries produce direct current.