Across
- 3. a type of electromagnetic radiation with the longest wavelengths in the electromagnetic
- 7. Spectrum THe wide range of electromagnetic wavelengths
- 8. a space entirely devoid of matter.
- 10. The process of directing excess electricity to the ground via a wire.
- 11. re, electric tension, or (electric) potential difference, is the difference in electric potential between two points.
- 12. the SI unit of frequency, equal to one cycle per second.
- 15. SI unit of electromotive force, the difference of potential that would drive one ampere of current against one ohm resistance.
- 19. A substance which does not readily allow the passage of heat or sound.
- 21. A negatively charged subatomic particle that can be either bound to an atom or free (not bound).
- 22. is the subjective perception of sound pressure.
- 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.
- 26. a wave vibrating at right angles to the direction of its propagation.
- 28. The time it takes for a particle or physical quality to move through one cycle of oscillation in a wave.
- 29. The number of wave cycles to pass a given point per unit of time.
Down
- 1. potential energy energy that is needed to move a charge against an electric field.
- 2. material which has an electrical conductivity value falling between that of a conductor, such as copper, and an insulator, such as glass.
- 4. The distance between successive similar points such as a crest of a wave.
- 5. Current electric current that is unidirectional, so the flow of charge is always in the same direction.
- 6. The type of matter through which a wave's energy propagates
- 9. The maximum distance a particle moves from its starting point in a wave.
- 13. one unit of constant electrical current.
- 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).
- 16. is the physical property of matter that causes charged matter to experience a force when placed in an electromagnetic field.
- 17. Current an electric current that reverses its direction many times a second at regular intervals, typically used in power supplies.
- 18. A mechanical wave in which in motion of the oscillating particles in the medium is parallel to the direction of the wave.
- 19. A measure of light power per unit area.
- 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.
- 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.
- 25. The process by which an object heats another object through electromagnetic waves.
- 27. point on a wave is the maximum value of upward displacement within a cycle