Inductance and Capacitance

The formula for calculating total parallel capacitance is __________.
A. CT = C1 + C2 + C3...
B. 1/CT = (1/C1) + (1/C2) + (1/C3)...
C. CT = C1 x C2 x C3...
D. CT = C1 - C2 - C3...

A. CT = C1 + C2 + C3...

__________ affects a DC circuit only when the current is first turned on, turned off, or when there is a change in the load resistance.
A. capacitance
B. Inductance
C. A time delay
D. A relay

B. inductance

A time-delay relay that uses an RC timing circuit is called a(n) ________.
A. solid-state, time-delay relay
B. adjustable relay
C. dashpot time-delay relay
D. motor-driven, time delay relay

A. solid-state, time-delay relay

The energy stored by a capacitor is called a(n) __________.
A. induced voltage
B. electrostatic charge
C. voltage spike
D. All of the above
E. None of the above

B. electrostatic charge

Capacitance is measured in __________.
A. Farads
B. henrys
C. Ohms
D. Vots

A. Farads

Which of the following is the correct formula for calculating total series inductance?
A. LT = L1 + L2 + L3...
B. LT = L1 x L2 x L3...
C. LT = (1/L1) + (1/L2) + (1/L3)...
D. All of the above
E. None of the above

A. LT = L1 + L2 + L3...

Which of the following is a type of capacitor?
A. Electrolytic
B. Nonpolarized
C. Variable
D. All of the above
E. None of the above

D. All of the above

Which of the following is the correct formula for calculating total parallel inductive reactance in a parallel circuit?
A. XLT = XL1 + XL2 + XL3...
B. XLT = XL1 x XL2 x XL3...
C. XLT = 1/[(1/XL1) + (1/XL2) + (1/XL3)...]
D. XLT + (1/XL1) + (1/XL2) + (1/XL3)...

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

Which of the following is not an example of an electromagnetic device?
A. Solenoid
B. Relay
C. Resistor
D. Motor

C. Resistor

The resistance provided by an inductor in an AC circuit is called __________.
A. Induced resistance
B. Inductive reactance
C. Electromotive force
D. All of the above
E. None of the above

B. inductive reactance

Inductance is measured in __________.
A. Ohms
B. Farads
C. henrys
D. RPMs

C. henrys

In a power supply that converts an AC input to generate a DC output, a capacitor is commonly used to __________.
A. block the current flow
B. increase the current flow
C. filter the rectifier's pulsating DC output
D. decrease the voltage

C. filter the rectifier's pulsating DC output

A coil that opposes any change in current flow is called a(n) __________.
A. inductor
B. Capacitor
C. transducer
D. oscillator

A. inductor

The concept of a magnetic field formed around a conductor when current flows through it is called __________.
A. capacitance
B. electromagnetism
C. flux
D. All of the above
E. None of the above

B. electromagnetism

Which of the following is the total series capacitive reactance formula?
A. XCT = XC1 x XC2 x XC3...
B. XCT = XC1 - XC2 - XC3...
C. XCT = XC1 + XC2 + XC3...
D. XCT = 1/[(1/XC1) + (1/XC2) + (1/XC3)...]

C. XCT = XC1 + XC2 + XC3...

The apparent resistance to AC by a capacitor is called __________.
A. frequency
B. capacitive reactance
C. passive capacitance
D. filtering

B. capacitive reactance

A common inductor found in fluorescent light fixtures is a __________.
A. starter
B. cathode
C. ballast
D. switcher

C. ballast

One of the effects a capacitor has in a DC circuit is that it will __________.
A. charge to a voltage equal to the source voltage
B. continue to charge until the source is completely drained
C. act like an open until it is fully charged
D. All of the above
E. None of the above

D. All of the above