Inductance and Capacitance

__________ affects a DC circuit only when the current is first turned on, turned off, or when there is a change in the load resistance.

Capacitance

Inductance

A time delay

A relay

Inductance

Which of the following is the correct formula for calculating total parallel inductive reactance in a parallel circuit?

XLT = XL1 + XL2 + XL3...

XLT = XL1 × XL2 × XL3...

XLT = 1/[(1/XL1) + (1/XL2) + (1/XL3)...]

XLT = (1/XL1) + (1/XL2) + (1/XL3)...

XLT = 1/[(1/XL1) + (1/XL2) + (1/XL3)...]

A common inductor found in fluorescent light fixtures is a __________.

Starter

Cathode

Ballast

Switcher

Ballast

The resistance provided by an inductor in an AC circuit is called __________.

Induced resistance

Inductive reactance

Electromotive force

All of the above

None of the above

Inductive reactance

A coil that opposes any change in current flow is called a(n) __________.

Inductor

Capacitor

Transducer

Oscillator

Inductor

Which of the following is the correct formula for calculating total series inductance?

LT = L1 + L2 + L3...

LT = L1 × L2 × L3...

LT = (1/L1) + (1/L2) + (1/L3)...

All of the above

None of the above

LT = L1 + L2 + L3...

Which of the following is the total series capacitive reactance formula?

XCT = XC1 × XC2 × XC3...

XCT = XC1 - XC2 - XC3...

XCT = XC1 + XC2 + XC3...

XCT = 1/[(1/XC1) + (1/XC2) + (1/XC3)...]

XCT = XC1 + XC2 + XC3...

The apparent resistance to AC by a capacitor is called __________.

Frequency displacement

Capacitive reactance

Passive capacitance

Filtering

Capacitive reactance

A time-delay relay that uses an RC timing circuit is called a(n) __________.

Solid-state, time-delay relay

Adjustable relay

Dashpot time-delay relay

Motor-driven, time-delay relay

Solid-state, time-delay relay

Which of the following is a type of capacitor?

Electrolytic

Nonpolarized

Variable

All of the above

None of the above

All of the above

Which of the following is not an example of an electromagnetic device?

Solenoid

Relay

Resistor

Motor

Resistor

In a power supply that converts an AC input to generate a DC output, a capacitor is commonly used to __________.

Block the current flow

Increase the current flow

Filter the rectifier's pulsating DC output

Decrease the voltage

Filter the rectifier's pulsating DC output

The concept of a magnetic field being formed around a conductor when current flows through it is called __________.

Capacitance

Electromagnetism

Flux

All of the above

None of the above

Electromagnetism

The formula for calculating total parallel capacitance is __________.

CT = C1 + C2 + C3...

1/CT = (1/C1) + (I/C2) + (1/C3)...

CT = C1 × C2 × C3...

CT = C1 - C2 - C3...

CT = C1 + C2 + C3...

One of the effects a capacitor has in a DC circuit is that it will __________.

Charge to a voltage equal to the source voltage

Continue to charge until the source is completely drained

Act like an open until it is fully charged

All of the above

None of the above

Charge to a voltage equal to the source voltage

Inductance is measured in __________.

Ohms

Farads

Henrys

RPMs

Henrys

The energy stored by a capacitor is called a(n) __________.

Induced voltage

Electrostatic charge

Voltage spike

All of the above

None of the above

Electrostatic charge

Capacitance is measured in __________.

Farads

Henrys

Ohms

Volts

Farads