Across
- 2. the SI unit of electromotive force, the difference of potential that would drive one ampere of current against one ohm resistance.
- 3. The highest point above the resting postion
- 4. a unit of measure of the rate of electron flow or current in an electrical conductor
- 8. Something that has been emitted, released or discharged
- 9. 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.
- 10. When light bounces off an object
- 11. The highest surface part of the wave
- 13. A measure of how high or low something sounds
- 17. 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.
- 19. A disturbance or variation that transfers energy progressively
- 23. describes how long the wave is
- 24. Materials that do not allow electricity to pass through them
- 26. a substance capable of becoming superconducting at sufficiently low temperatures
- 28. The bending of a wave around the edge of an opening or an obstacle
- 30. A unit of frequency of change in a state or cyclical waveform of once per cycle
Down
- 1. supply the needed power by varying the supply current, and fixing the supplied voltage, depending on the total resistance encountered
- 5. 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
- 6. the pressure from an electrical circuit's power source that pushes charged electrons (current) through a conducting loop, enabling them to do work such as illuminating a light
- 7. a characteristic of a unit of matter that expresses the extent to which it has more or fewer electrons than protons.
- 12. a measure of the opposition to current flow in an electrical circuit
- 14. The number of wave cycles to pass a given point per unit of time
- 15. he measure of the height of the wave.
- 16. A measure of light power per unit area
- 18. s one-directional flow of electric charge.
- 20. A volume empty of matter sometimes called free space
- 21. The type of matter through which a wave energy propagate
- 22. is the physical field that surrounds electrically charged particles and exerts force on all other charged particles
- 25. An electric current that frequently reverses direction
- 27. formed when an electric field (which is shown in red arrows) couples with a magnetic field
- 29. a method used to charge an object without actually touching the object to any other charged object