Electronics Test Chapter 15 and more
In a pure inductive circuit, current lags voltage by ____ degrees
90
The unit of inductance is the _____
Henery
The total current limiting effect is called??
Impedance
The number of cycles completed in a second is called a
Frequency
What is the unit for capacitive reactance?
Ohms
Dividing a circuit's total applied voltage by the total impedance results in the total
current
In an RLC series circuit, rhe point at which Xl and Xc are equal is called ______
resonance
What letter symbolizes the farad?
F
Frequency is measured in.....
Hertz
When a magnetic field continually changes magnitude and direction, a voltage is continually being induced in the coil. This voltage is called __ voltage.
Induced
Circuits are generally considered to contain ____ when any type of load that contains a coil is used
Inductance
The square root of the mean of the square of the instantaneous currents is known as the.....
RMS or effective value
The current limiting property of an inductor is called _______
Reactance
What type of load contains pure resistance?
Resistive load
If a AC waveform is rectified and converted to DC, the resulting waveform is normally not pure. It is called the......
Ripple or pulsating DC
Rotary machines normally produce a waveform called ________ waves
Sine
What is the most common of all wave forms?
Sine waves
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
Because inductive reactance and capacitive reactance are ______ degrees out of phase with each other, they subtract from each other in an AC circuit
180
Variable capacitors normally have a dielectric of _____
Air
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....
Effective value
What is the basic unit of capacitance
Farad
The symbol XL stands for??
Inductive reactance
In a pure capacitive circuit, the current _____ the applied voltage by _______
Leads, 90 degrees
When current rises and falls at the same rate as the voltage and reverses the direction of flow when the voltage reverses polarity, the current is said to be _____ with the voltage.
Phase
*A capacitor is constructed by separating two metal conductors known as ______ with an insulating material known as _____
Plate, dielectric
What type of AC waveform features voltage rising rate with respect to time?
Triangle wave
In a DC circuit, the product of volts times the amperes the called the _______ power
True
Increasing the surface are of the plates will cause the capacitance of a capacitor to _______
Up or increase
What is the unit of measure for the power delivered to the load in a DC circuit?
Watts
The symbol for reactance is??
X
What is the symbol for capacitive reactance
Xc
The amplitude of a waveform from.....
Zero to highest value
Square waves are generally produced by electronic devices called _____.
oscillators
The maximum point of a waveform is called the _____.
peak
What is a device that opposes a change of voltage
Capacitors
Which one can be transformed, AC or DC?
AC
