Across
- 2. or providing the flow of charge through a conductor
- 5. Electric power is the rate at which electrical energy is transferred by an electric circuit. The SI unit of power is the watt, one joule per second. Electric power is usually produced by electric generators, but can also be supplied by sources such as electric batteries.
- 7. An electromotive force or potential difference expressed in volts.Voltage is electric potential energy per unit charge, measured in joules per coulomb ( = volts). It is often referred to as "electric potential", which then must be distinguished from electric potential energy by noting that the "potential" is a "per-unit-charge" quantity.
- 8. An instrument for measuring electric current in amperes.
- 12. An electric motor is an electrical machine that converts electrical energy into mechanical energy.
- 15. An electric current flowing in one direction only.
- 16. The interaction of electric currents or fields and magnetic fields.
- 19. A magnetic domain is a region within a magnetic material in which the magnetization is in a uniform direction. This means that the individual magnetic moments of the atoms are aligned with one another and they point in the same direction.
- 21. An electric current that reverses its direction many times a second at regular intervals, typically used in power supplies.
- 23. Electromagnetic induction definition. Production of an electric current by changing the magnetic field enclosed by an electrical circuit. The most common use of electromagnetic induction is in the electric generator.
- 24. Magnetic force, attraction or repulsion that arises between electrically charged particles because of their motion; the basic force responsible for the action of electric motors and the attraction of magnets for iron.
- 25. a form of energy resulting from the existence of charged particles (such as electrons or protons)
- 26. The resistance that one surface or object encounters when moving over another. The action of one surface or object rubbing against another.
- 29. a device that attracts iron
- 30. A region around a magnetic material or a moving electric charge within which the force of magnetism acts.
Down
- 1. postively charged dense center of an atom
- 3. An instrument for detecting and measuring small electric currents.
- 4. a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.
- 6. A stationary electric charge, typically produced by friction, that causes sparks or crackling or the attraction of dust or hair.
- 9. a physical phenomenon produced by the motion of electric charge, resulting in attractive and repulsive forces between objects.
- 10. A series circuit is a closed circuit in which the current follows one path, as opposed to a parallel circuit where the circuit is divided into two or more paths. In a series circuit, the current through each load is the same and the total voltage across the circuit is the sum of the voltages across each load.
- 11. Electrostatic discharge (ESD) is the sudden flow of electricity between two electrically charged objects caused by contact, an electrical short, or dielectric breakdown. A buildup of static electricity can be caused by tribocharging or by electrostatic induction.
- 13. A machine for producing continuous power in which a wheel or rotor, typically fitted with vanes, is made to revolve by a fast-moving flow of water, steam, gas, air, or other fluid.
- 14. The process by which heat or electricity is directly transmitted through a substance when there is a difference of temperature or of electrical potential between adjoining regions, without movement of the material.
- 17. a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
- 18. A cylindrical coil of wire acting as a magnet when carrying electric current.
- 20. A voltage source is a two terminal device which can maintain a fixed voltage. An ideal voltage source can maintain the fixed voltage independent of the load resistance or the output current.
- 22. Resistance is an electrical quantity that measures how the device or material reduces the electric current flow through it. The resistance is measured in units of ohms (Ω).
- 27. Each of the points near the extremities of the axis of rotation of the earth or another celestial body where a magnetic needle dips vertically.
- 28. a law stating that electric current is proportional to voltage and inversely proportional to resistance.