Electric and Magnetic Field

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Across
  1. 3. In physics and electrical engineering, a conductor is an object or type of material that allows the flow of electrical current in one or more directions. A wire is an electrical conductor that can carry electricity along its length. In metals such as copper or aluminum, the mobile charged particles are electrons.
  2. 6. A region around a magnetic material or a moving electric charge within which the force of magnetism acts.
  3. 7. An instrument for measuring electric current in amperes.
  4. 9. The interaction of electric currents or fields and magnetic fields.
  5. 12. is a closed circuit in which the current divides into two or more paths before recombining to complete the circuit. Each load connected in a separate path receives the full circuit voltage, and the total circuit current is equal to the sum of the individual branch currents.
  6. 14. states that the current through a conductor between two points is directly proportional to the potential difference across the two points.
  7. 16. 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.
  8. 17. 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.
  9. 18. 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.
  10. 19. 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.
  11. 20. A stationary electric charge, typically produced by friction, that causes sparks or crackling or the attraction of dust or hair.
Down
  1. 1. The resistance that one surface or object encounters when moving over another. The action of one surface or object rubbing against another.
  2. 2. An electric current flowing in one direction only.
  3. 4. A thing or substance used for insulation, in particular.a substance that does not readily allow the passage of heat or sound. A substance or device that does not readily conduct electricity.
  4. 5. An electric current that reverses its direction many times a second at regular intervals, typically used in power supplies.
  5. 8. A physical phenomenon produced by the motion of electric charge, resulting in attractive and repulsive forces between objects.
  6. 10. 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.
  7. 11. an apparatus for reducing or increasing the voltage of an alternating current.
  8. 13. 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.
  9. 15. 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).