Alternating Current A/C
When different rated capacitors are connected in parallel in a circuit, the total capacitance is?
Equal to the sum of all the capacitances
When inductors are connected in series in a circuit, the total inductance is (where the magnetic fields of each inductor do not affect the others)
Equal to the sum of the individual inductances
What is the total capacitance of a certain circuit containing three capacitors with capacitances of .25 microfarad, .03 microfarad, and .12 microfarad, respectively?
.4 uf
One megahertz is equal to which of the following?
1,000,000Hz
What is the value of 5kHz?
5000Hz
When different rated capacitors are connected in series in a circuit, the total capacitance is?
A less than the capacitance of the lowest rated capacitor
A four-input AND gate produces a high output when
All inputs are high
The working voltage of a capacitor in a an AC circuit should be?
At least 50 percent greater than the highest applied voltage.
The three electrodes of a junction transistor are the ?
Base, collector, and emitter
What is the actual opposition to current flow created by a capacitor in an ac circuit?
Capacitive reactance
The power factor in an ac circuit is equal to the __________________ of the phase shift angle
Cosine
P-type material semiconductor material has a ______________ of electrons
Deficiency of electrons
In a solid state diode, the area near the junction which has deficient of electrons and holes is called the?
Depletion region
When installed in an ac circuit, which of the following components will cause current to lag voltage?
ELI = current lags the voltage Capacitors
Unless otherwise specified, any values given for current or voltage in an AC circuit are assumed to be?
Effective Values
Unless otherwise specified, any values given for current or voltage in an ac circuit are assumed to be?
Effective values
Which of the following factors will cause an increase in the inductive reactance of a circuit?
Frequency
The term that describes the combined resistive forces in an AC circuit is?
Impedance
What is the total opposition to current flow in an ac circuit?
Impedance
When the capacitive reactance in an ac electric circuit is equal to the inductive reactance, the circuit is said to be?
In Phase
Which of the following is a common trend in modern aircraft design?
Increase the use of electrical and electronic systems
The basis for transformer operation in the use of alternating current is mutual
Inductance
The basis for transformer operation in the use of alternating current is mutual?
Inductance
An increase in which of the following factors will cause an increase in the inductive reactance of a circuit?
Inductance and frequency
The opposition offered by a coil to the flow of alternating current is called (disregard resistance)?
Inductive Reactance
The opposition offered by a coil to flow of alternating current is called?
Inductive reactance
In an AC circuit, the effective voltage is?
Less than the maximum instantaneous voltage
Solid state diodes are made from?/
P and N type semiconductor material
PIV stands for?
Peak inverse voltage / the maximum reverse voltage a diode can withstand
The amount of electricity a capacitor can store is directly proportional to the?
Plate area and inversely proportional to the distance between the plates.
If the frequency in an ac circuit containing capacitors increases, what will happen to the total capacitive reactance of that circuit?
Total capacitive reactance will decrease
If the frequency increases in an ac circuit containing inductors, what will happen to the total inductive reactance of that circuit?
Total reactance will increase.
In an ac circuit with no phase difference between voltage and current which is true?
True Power equals apparent power
What is the primary purpose of a varactor?
Voltage variable capacitor
What is the base of the binary number system?
base 2