Electronics chapter 17-24
The amplitude of a wave form is measured from
0>peak
In a pure inductive circuit, current lags voltage by..
90 degrees
Which AC or DC can be transformed?
AC
What is the basic unit of capacitive reactance?
Farads
The number of cycles completed in one second is called a ________
Frequency
Frequency is measured in ______
Hertz
The total current limiting effect is called ...
Impedance
When current rises and falls at the same rate as the voltage and reverses the direction of flow when the voltage reversed polarity, the current is said to be ___ _______ with voltage
In Phase
The square root of the mean of the square of the instantaneous currents is known as the _____ _____
RMS Current
The current limiting property of an inductor is called _____
Reactance
When AC voltage is rectified and converted into DC, the resulting wave form is normally not pure, flat DC. But is ____
Referred to as repel
What type of load contains pure resistance ?
Resistance loads
Rotating machines normally produce a wave form called a ______ wave
SINE
What is the most common of all AC wave forms?
Sine
The ______ effect occurs when AC induces eddy currents into the conductor, which cause the electrons to be repelled toward the outer surface of the conductor.
Skin
To help overcome the problem of skin effect in high frequency circuits, conductors with a large amount of _____ _____ must be used.
Surface area
What type of AC wave form features voltage rising at a constant rate with respect to time?
Triangular
In a DC circuit, the product of volts times the amperes is called the _____ power
True
What is the unit of measure for the power delivered to the load in a DC circuit?
Watts
The symbol for reactance is
X
Variable capacitors normally have dielectric of
Air
If an AC wave form is rectified and converted into DC, the voltage value that results is the ______ value
Average
What is a device that opposes a change of voltage?
Capacitor
Each complete wave form of 360 degrees is called a _______
Cycle
A term used to indicate the same value as the RMS value is the ______ value
Effective
When a magnetic field continually changes magnitude and direction, a voltage is continually being induced in the coil. The voltage is called _____
Induced voltage
Circuits are generally considered to contain ______ when any type of load that contains a coil is used.
Inductance
The symbol Xl stands for
Inductive reactance
In a pure capacitive circuit, the current _____ the applied voltage by_____
Leads, 90 degrees
Square waves are generally produced by electronic devices called
Ocillators
The unit of inductance is the
Ohm
What is the unit for capacitive reactance?
Ohms
The maximum point of a wave form is called the ______
Peak