Across
- 1. a principle stating that the total electric charge of an isolated system is fixed.
- 3. the SI base unit of electrical current.
- 5. a material or device that conducts or transmits heat, electricity, or sound, especially when regarded in terms of its capacity to do this
- 8. the study of stationary electric charges or fields as opposed to electric currents.
- 11. 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.
- 14. combination of two waves moving in opposite directions, each having the same amplitude and frequency
- 16. devices where equal and opposite charges are held on separate "plates", with a potential difference between them proportional to this charge
- 18. system that vibrates at some natural frequency
- 21. the property of zero electrical resistance in some substances at very low absolute temperatures.
- 24. principle describing the effect of two waves of the same type passing the same point at the same time
- 25. motion repeated in equal intervals of time
- 27. the pattern of disturbance caused by the movement of energy traveling through a medium as it moves away from the source of the sound
- 28. type of wave in which the medium's vibration is parallel to the direction of the wave
- 29. materials which have a conductivity between conductors (generally metals) and nonconductors or insulators
- 30. the intensity or flux of radiant energy is the power transferred per unit area
Down
- 2. an electric current that reverses its direction many times a second at regular intervals
- 4. an electric current flowing in one direction only.
- 6. 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
- 7. the highest surface part of a wave
- 9. change in direction of a wave passing from one medium to another caused by its change in speed
- 10. process in which two dissimilar materials in close contact produce an electrical voltage when struck by light or other radiant energy
- 12. energy that comes from a source and travels through space at the speed of light
- 13. any space in which the pressure is considerably lower than atmospheric pressure
- 15. store electrical energy in (a battery or battery-operated device)
- 17. a substance which does not readily allow the passage of heat or sound
- 19. the SI unit of electromotive force, the difference of potential that would drive one ampere of current against one ohm resistance.
- 20. connect (an electrical device) with the ground.
- 22. a particle of light which essentially is a packet of electromagnetic radiation
- 23. the property of sound which is used for differentiating between the loud and faint sound
- 26. the distance between equal crests of a wave