| A | B |
|---|
| 1. What is Electric charge | positive or negative particles that exert an electric force. |
| 2. What is Electric discharge | the removal of an electric charge from an object. |
| 3. What is Neutral | when there is neither positive nor negative charge from an object. |
| 4. What is Current electricity | the continuous movement of charged particles along a path. |
| 5. What is a Galvanometer | a device used to detect a weak electric current. |
| 6. What is an Ammeter | a device used to measure electric current. |
| 7. What is a Cell | a device that converts chemical energy into electrical energy. |
| 8. What is a Battery | two or more electric cells, joined used as a source of electric current. |
| 9. What is a Volt | unit used to measure voltage; the symbol is V. |
| 10. What is Static electricity | the build-up of electric charges on an object |
| 11. What is a Voltmeter | a device used to measure voltage. |
| 12. What is an Electrode | part of an electric cell that allows electrons to enter or leave: it is usually made of a metal or of carbon. |
| 13. What is an Electrolyte | a solution that conducts electricity. |
| 14. What is a Resistor | a device with a certain resistance to the passage of electric charges: used in electronic devices. |
| 15. What is a Variable resistor: | a device that can be used to control the amount of current in an electric circuit. |
| 16. What is a Rheostat | a variable resistor; used to control devices such as electric motors and dimmer switches. |
| 17. What is are Generators | a device that produces electrical energy from mechanical energy, usually from the kinetic energy of steam or running water. |
| 18. What is a Permanent magnet | a piece of hard steel alloy that stays magnetized for a long time. |
| 19. What is a Electromagnet | a coil of wire, usually with an iron core, that becomes magnetized when a current exists in it. |
| 20. What is an Armature | the rotating electromagnet in n electric motor. |
| 21. What is a Split ring commutator | a contact on the armature of a motor; a split cylinder that acts as a switching (control) device. |
| 22. What is a Thermocouple | device consisting of a junction of two different metals; it produces an electric current when the junction is heated. |
| 23. What is a Solar cell | a device that converts light energy into electrical energy. |
| 24. What is the Photoelectric effect | an effect in which light, shining on metal, causes electrons to be emitted from the surface of the metal, producing an electric current. |
| 25. What is the Piezoelectric effect | an electric current produced by sound, due to the changing pressure of sound waves on certain crystals. |
| 26. What is an Electrical circuit | an uninterrupted conducting path for an electric current |
| 27. What is a Closed circuit | a circuit in which there is an uninterrupted conducting path for electric current. |
| 28. What is an Open circuit | an electric circuit in which the conducting path is broken or incomplete. |
| 29. What is a Switch | device that can open or close an electric circuit; used as a control in an electric circuit. |
| 30. What is a Source | the part of an electric circuit that changes some other form of energy into electrical energy. |
| 31. What is a Conductor | a material that allows electric current to pass through it easily. |
| 32. What is a Control | the part of an electric circuit by which the circuit is opened or closed; usually a switch. |
| 33. What is a Load | the part of a circuit that changes electrical energy into some other form of energy. |
| 34. What is a Series circuit | an electric circuit with one conducting path and no branches. |
| 35. What is a Parallel circuit | an electric circuit that provides alternate conducting paths for electric current. |
| 36. What is a Joule | the SI unit for energy; the symbol is J. |
| 37. What is a Watt | unit used to measure electrical power; the symbol is W. |
| 38. What is a Watt second | a unit of electrical energy equivalent to one joule. |
| 39. What is a Kilowatt-hour | a unit in which electrical energy, as consumed by a household or for a building, is measure; the symbol is kWh. |
| 40. What is a Neutral wire | a wire that is not "hot", a wire that is "grounded" - connected to the ground. |
| 41. What is a Hot wire | also live wires; wires that are not grounded, bringing electrical energy into a home or building. |
| 42. What is a Circuit breaker | a device that protects an electric circuit form overheating by opening the circuit. |
