Physic's Wave and Electricity.

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Across
  1. 3. a type of electromagnetic radiation with the longest wavelengths in the electromagnetic
  2. 7. Spectrum THe wide range of electromagnetic wavelengths
  3. 8. a space entirely devoid of matter.
  4. 10. The process of directing excess electricity to the ground via a wire.
  5. 11. re, electric tension, or (electric) potential difference, is the difference in electric potential between two points.
  6. 12. the SI unit of frequency, equal to one cycle per second.
  7. 15. SI unit of electromotive force, the difference of potential that would drive one ampere of current against one ohm resistance.
  8. 19. A substance which does not readily allow the passage of heat or sound.
  9. 21. A negatively charged subatomic particle that can be either bound to an atom or free (not bound).
  10. 22. is the subjective perception of sound pressure.
  11. 23. capacitor is a device that stores electrical energy in an electric field by virtue of accumulating electric charges on two close surfaces insulated from each other.
  12. 26. a wave vibrating at right angles to the direction of its propagation.
  13. 28. The time it takes for a particle or physical quality to move through one cycle of oscillation in a wave.
  14. 29. The number of wave cycles to pass a given point per unit of time.
Down
  1. 1. potential energy energy that is needed to move a charge against an electric field.
  2. 2. material which has an electrical conductivity value falling between that of a conductor, such as copper, and an insulator, such as glass.
  3. 4. The distance between successive similar points such as a crest of a wave.
  4. 5. Current electric current that is unidirectional, so the flow of charge is always in the same direction.
  5. 6. The type of matter through which a wave's energy propagates
  6. 9. The maximum distance a particle moves from its starting point in a wave.
  7. 13. one unit of constant electrical current.
  8. 14. is the property of certain materials to conduct direct current (DC) electricity without energy loss when they are cooled below a critical temperature (referred to as Tc).
  9. 16. is the physical property of matter that causes charged matter to experience a force when placed in an electromagnetic field.
  10. 17. Current an electric current that reverses its direction many times a second at regular intervals, typically used in power supplies.
  11. 18. A mechanical wave in which in motion of the oscillating particles in the medium is parallel to the direction of the wave.
  12. 19. A measure of light power per unit area.
  13. 20. subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
  14. 24. process of generating electrical current in a conductor by placing the conductor in a changing magnetic field is called electromagnetic induction or just induction.
  15. 25. The process by which an object heats another object through electromagnetic waves.
  16. 27. point on a wave is the maximum value of upward displacement within a cycle