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