8th Grade PS Unit 10: Electricity and Magnetism

21 flashcards · Physics · by Samvid Konchada

1. The process by which energy is transferred from a warmer object to a cooler object by means of physical contact. i.e. heat conducts from the bottom of a metal pot to the handle

   Conduction

2. A material that transfers energy easily. i.e. copper

   Conductor

3. A passive two-terminal electrical component that stores energy in a magnetic field when electric current flows through it. i.e. an insulated wire wound into a coil

   Inductor

4. A force that resists the sliding or rolling of one solid object over another. i.e. slows a rolling ball until it stops

   Friction

5. Any of various substances that block or retard the flow of electrical or thermal currents. i.e. air in a thermos

   Insulator

6. A form of electricity resulting from the imbalance between positive and negative charges within a material that occurs when electrons (the negatively charged particles in an atom) move from one material to another. i.e. when rubbing hair against balloon, you transfer static electricity to the balloon

   Static electricity

7. Any movement of electric charge carriers, such as subatomic charged particles (e.g., electrons having negative charge, protons having positive charge), ions (atoms that have lost or gained one or more electrons), or holes (electron deficiencies that may be thought of as positive particles). i.e. electrons moving through a charging wire

   Electric current

8. The property of an electric circuit or part of a circuit that transforms electric energy into heat energy in opposing electric current. i.e. a lightbulb

   Resistance

9. A circuit that comprises branches so that the current divides and only part of it flows through any branch. i.e. a parallel circuit with 3 lamps, 1 switch, and a battery

   Parallel circuit

10. A circuit that comprises a path along which the whole current flows through each component. i.e. a series circuit with 3 bulbs, and a battery

    Series circuit

11. A device for opening and closing electrical circuits under normal load conditions, usually operated manually. i.e. a switch for turning a light on and off

    Switch

12. A measure that describes the “pressure” that pushes electricity. i.e. 3 volts

    Voltage

13. The "rate" that current is flowing through the circuit or the number of electrons moving through the wire. i.e. 2 amps

    Amps

14. The unit of electrical resistance in the metre-kilogram-second system. i.e. 4 ohms

    Ohms

15. One if the regions at each ends of Earth's magnetic field where the external magnetic field is strongest to the north. i.e. the north pole

    North pole

16. One if the regions at each ends of Earth's magnetic field where the external magnetic field is strongest to the south. i.e. the south pole

    South pole

17. A vector field in the neighbourhood of a magnet, electric current, or changing electric field, in which magnetic forces are observable. i.e. magnetic field of the Earth

    Magnetic field

18. A device consisting of a core of magnetic material surrounded by a coil through which an electric current is passed to magnetize the core. i.e. an electromagnetic for sorting recycling waste

    Electromagnet (solenoid)

19. flow of electric charge that periodically reverses i.e. The supply you get to your home from utility

    AC

20. flow of electric charge that does not change direction i.e. to supply power to electrical devices

    DC

21. Any machine that converts mechanical energy to electricity for transmission and distribution over power lines to domestic, commercial, and industrial customers. i.e. water turbine

    Generator