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# AC Fundementals

### Study aid for Apprentice Electricians

The % of change in one time constant. 63.2%
Self induced voltage will always oppose the applied voltage by_____degrees. 180
Inductance is measured in? Henries (H)
Capacitance is measured in? Farads (F)
One cycle has how many alterations? Two (2)
Higher frequency on a given value capacitor will cause current to? Increase
The amount of charge on the plates of a capacitor is a function of? Current and Time
The formula for finding a RMS value is? Emax or Imax times sine(45)
In a capacitor, the electric energy is stored in a(n)___________ Field. Electrostatic
What is an example of a variable capacitor? A radio tuner
In an inductor, electric energy is stored in a(n)____________ field? Electromagnetic
Mica, paper and electrolytic are three types of: Capacitors
The effective value of AC is based on the heating effect of the equivalent DC. True
When current and voltage peak in the same direction at the same time it is called: In Phase
The inductance symbol is L
The total opposition to current in an AC circuit is; Impedance
Inductance opposes a change in: Current
Volts per millimeter is used to measure: Dielectric Strength
Created by: ScottLetwin