Across
- 4. The starting point at the zero reference line of a sine wave as seen on an oscilloscope measuring the alternation of an AC electrical cycle.
- 9. A device that converts alternating current into direct current. In effect, it is an electron check valve.
- 10. Another name for capacitor.
- 14. In an AC circuit, the product of RMS (Root Mean Square) current and RMS voltage, expressed in volt-amperes.
- 18. The value of direct current equivalent to an alternating current sine wave. The value is 0.707 times the peak value of one alternation.
- 19. The secondary winding of a transformer.
- 21. The difference between the positive and negative peak values of an AC sine wave.
- 22. The wave form of alternating current produced by a rotary generator. Its amplitude at any time is proportional to the sine of the angle through which the generator has turned.
Down
- 1. A device used to store electrical energy in the form of electrostatic fields. A capacitor is essentially two conductors separated by an insulator.
- 2. A unit used for measuring the frequency of vibrations or of AC electricity. It is used for the frequency of any type of repeating cycles of motion. One hertz is equal to one cycle per second.
- 3. The frequency of a source of vibration that is exactly the same as the natural vibration frequency of a structure.
- 5. 1st The number of degrees of generator rotation between the time the voltage passes through zero and the time the current passes t trough zero in the same direction. 2nd In AC electricity the amount of phase shift between the current and voltage.
- 6. Sine wave alternating current. 0.637 times the peak value of alternating current or voltage, measured from the zero reference line.
- 7. The product of the voltage and current in a circuit.
- 8. The root mean square (RMS) value of sine wave AC. It is equivalent to 0.707 times the peak value and corresponds to the DC value that will produce the same amount of heat.
- 11. In AC electricity, the value found by multiplying the peak value of a sine wave by the sine of the angle through which the loop rotates beyond its zero-voltage position.
- 12. The primary winding of a transformer.
- 13. The maximum value of AC or voltage measured from the zero reference line.
- 15. The power that actually exists in an AC circuit. It is the product of the voltage, current, and power factor: or is the product of the voltage and the current that is in phase with that voltage. True power is expressed in watts.
- 16. The time required for one cycle of AC.
- 17. In AC current, one-half of an AC cycle in which the voltage or current rises of falls from zero to peak and back to zero.
- 20. A material that will not conduct electricity