1. 2. a point in a curve or on a graph, or a value of a physical quantity, higher than those around it.
  2. 4. a periodic disturbance of the particles of a substance which may be propagated without net movement of the particles, such as in the passage of undulating motion, heat, or sound.
  3. 7. the type of matter through which a wave propagates.
  4. 11. the SI unit of electromotive force, the difference of potential that would drive one ampere of current against one ohm resistance.
  5. 13. a 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.
  6. 15. A phenomenon that occurs when a wave or object bounces off an interface or another object.
  7. 17. the property of matter that is responsible for electrical phenomena, existing in a positive or negative form.
  8. 18. the property of zero electrical resistance in some substances at very low absolute temperatures.
  9. 20. the SI unit of frequency, equal to one cycle per second.
  10. 21. a device used to store an electric charge, consisting of one or more pairs of conductors separated by an insulator.
  11. 23. a substance which does not readily allow the passage of heat or sound.
  12. 26. The process by which an object heats another object through electromagnetic waves.
  13. 27. a solid substance that has a conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects. Devices made of semiconductors, notably silicon, are essential components of most electronic circuits.
  14. 28. a particle of electromagnetic radiation, or quantum of light.
  15. 30. the process of removing the excess charge on an object by means of the transfer of electrons between it and another object of substantial size.
  1. 1. the SI base unit of electrical current.
  2. 3. the distance between successive similar points, such as crests, of a wave
  3. 5. the SI unit of electrical resistance, expressing the resistance in a circuit transmitting a current of one ampere when subjected to a potential difference of one volt.
  4. 6. the bending of a wave around the edges of an opening or an obstacle.
  5. 8. a quantitative expression of the potential difference in charge between two points in an electrical field.
  6. 9. the number of wave cycles to pass a point given per unit of time.
  7. 10. the measure of light power per unit area
  8. 12. a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids
  9. 14. 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.
  10. 16. the maximum distance a particle moves from its starting point in a wave.
  11. 19. the process or action of bringing about or giving rise to something.
  12. 22. the time it takes for a particle or physical quantity to move through one cycle of oscillation in a wave.
  13. 24. an oscillation of the parts of a fluid or an elastic solid whose equilibrium has been disturbed, or of an electromagnetic wave.
  14. 25. a space entirely devoid of matter.
  15. 29. a material or device that conducts or transmits heat, electricity, or sound, especially when regarded in terms of its capacity to do this.