Question 1

Three-phase systems provide voltages that are ____ electrical time degrees apart.

Accepted Answer

A)  90 
B)  120 
C)  180 
D)  360 
A)  90 
B)  120 
C)  180 
D)  360 B

Question 2

Impedance is calculated by dividing ____ by ____.

Accepted Answer

A)  power, voltage 
B)  voltage, power 
C)  current, voltage 
D)  voltage, current 
A)  power, voltage 
B)  voltage, power 
C)  current, voltage 
D)  voltage, current D

Question 3

What is one example of negative power?

Accepted Answer

A)  charging a battery 
B)  current flowing through a resistor 
C)  voltage across a capacitor 
D)  impedance of an inductor 
A)  charging a battery 
B)  current flowing through a resistor 
C)  voltage across a capacitor 
D)  impedance of an inductor A

Question 4

In a DC circuit, a capacitor allows the current to flow only until the charge on the capacitor is ____.

Accepted Answer

A)  greater than the applied voltage 
B)  equal to the applied voltage 
C)  less than the applied voltage 
D)  zero 
A)  greater than the applied voltage 
B)  equal to the applied voltage 
C)  less than the applied voltage 
D)  zero

Question 5

Vector diagrams, drawn to scale, can be used to determine average power values.

Accepted Answer

A) True 
 B)False

Question 6

In a purely capacitive circuit, the current will lead the voltage by ____ degrees.

Accepted Answer

A)  -90 
B)  90 
C)  180 
D)  360 
A)  -90 
B)  90 
C)  180 
D)  360

Question 7

In mutual induction, there is an electrical connection between two or more coils.

Accepted Answer

A) True 
 B)False

Question 8

A noninductive coil has high ____ and no inductance.

Accepted Answer

A)  resistance 
B)  reactance 
C)  current 
D)  frequency 
A)  resistance 
B)  reactance 
C)  current 
D)  frequency

Question 9

The insulating material in a capacitor is called the ____.

Accepted Answer

A)  shield 
B)  plates 
C)  diaphragm 
D)  dielectric 
A)  shield 
B)  plates 
C)  diaphragm 
D)  dielectric

Question 10

The amount of voltage produced by a coil rotating in a magnetic field depends upon the strength of the magnetic field.

Accepted Answer

A) True 
 B)False

Question 11

The ease with which the voltage can be raised and lowered makes DC ideal for transmission purposes.

Accepted Answer

A) True 
 B)False

Question 12

The ____ value of an alternating current is that value that will produce the same heating effect as a specific value of a steady direct current.

Accepted Answer

A)  conversion 
B)  instantaneous 
C)  effective 
D)  average 
A)  conversion 
B)  instantaneous 
C)  effective 
D)  average

Question 13

Electromagnetic induction can be accomplished in two different ways: by moving a magnetic field across a coil, or a coil through the magnetic field.

Accepted Answer

A) True 
 B)False

Question 14

Current ____ voltage in an inductor.

Accepted Answer

A)  lags 
B)  leads 
C)  is equal to 
D)  is always in phase with 
A)  lags 
B)  leads 
C)  is equal to 
D)  is always in phase with

Question 15

What is the unit used to measure inductance?

Accepted Answer

A)  gilbert 
B)  henry 
C)  ohm 
D)  farad 
A)  gilbert 
B)  henry 
C)  ohm 
D)  farad

Three-phase systems provide voltages that are ____ electrical time degrees apart.

Impedance is calculated by dividing by .

What is one example of negative power?

In a DC circuit, a capacitor allows the current to flow only until the charge on the capacitor is ____.

Vector diagrams, drawn to scale, can be used to determine average power values.

In a purely capacitive circuit, the current will lead the voltage by ____ degrees.

In mutual induction, there is an electrical connection between two or more coils.

A noninductive coil has high ____ and no inductance.

The insulating material in a capacitor is called the ____.

The amount of voltage produced by a coil rotating in a magnetic field depends upon the strength of the magnetic field.

The ease with which the voltage can be raised and lowered makes DC ideal for transmission purposes.

The ____ value of an alternating current is that value that will produce the same heating effect as a specific value of a steady direct current.

Electromagnetic induction can be accomplished in two different ways: by moving a magnetic field across a coil, or a coil through the magnetic field.

Current ____ voltage in an inductor.

What is the unit used to measure inductance?

Language of Electricity

Electrical Fundamentals

Electrical Power and Energy

Test Equipment

Basic Resistive Electrical Circuits

Magnets and Magnetism

Ac Circuits

Conductor Types and Sizes

Wiring Methods

Wiring Applications

Transformers

Electrical Distribution

Lighting

Electric Heat

Dc Generators

Dc Motors

Ac Generators Alternators

Ac Motors

Motor Control Devices and Circuits

Basic Industrial Electronics

Dc Electronic Variable Speed Drives

Ac Inverter Drives

Programmable Logic Controllers

Filters

Exam 7: Alternating Current

Three-phase systems provide voltages that are ____ electrical time degrees apart.

Impedance is calculated by dividing ____ by ____.

What is one example of negative power?

In a DC circuit, a capacitor allows the current to flow only until the charge on the capacitor is ____.

Vector diagrams, drawn to scale, can be used to determine average power values.

In a purely capacitive circuit, the current will lead the voltage by ____ degrees.

In mutual induction, there is an electrical connection between two or more coils.

A noninductive coil has high ____ and no inductance.

The insulating material in a capacitor is called the ____.

The amount of voltage produced by a coil rotating in a magnetic field depends upon the strength of the magnetic field.

The ease with which the voltage can be raised and lowered makes DC ideal for transmission purposes.

The ____ value of an alternating current is that value that will produce the same heating effect as a specific value of a steady direct current.

Electromagnetic induction can be accomplished in two different ways: by moving a magnetic field across a coil, or a coil through the magnetic field.

Current ____ voltage in an inductor.

What is the unit used to measure inductance?

Language of Electricity

Electrical Fundamentals

Electrical Power and Energy

Test Equipment

Basic Resistive Electrical Circuits

Magnets and Magnetism

Ac Circuits

Conductor Types and Sizes

Wiring Methods

Wiring Applications

Transformers

Electrical Distribution

Lighting

Electric Heat

Dc Generators

Dc Motors

Ac Generators Alternators

Ac Motors

Motor Control Devices and Circuits

Basic Industrial Electronics

Dc Electronic Variable Speed Drives

Ac Inverter Drives

Programmable Logic Controllers

Filters

Impedance is calculated by dividing by .