Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

3-1 > 3-1-8 Inductance > Flashcards

3-1-8 Inductance Flashcards

1
Q

Inductance is the ability of a current-carrying conductor, coil, or circuit to induce a __?__ into itself or adjacent circuits.

A

Voltage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

The letter __?__ is used as a symbol to designate inductance.

A

L

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

As the circuit current increases, the magnetic field that it creates __?__.

A

increases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

When the current changes direction, the magnetic field it creates changes __?__.

A

polarity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

An induced voltage is always opposite in polarity to the applied voltage.

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The induced voltage of a coil is __?__ out of phase with the applied voltage.

A

180 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

A unit of inductance is called a(n) __?__.

A

henry

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

The induced voltage in a coil is in a direction so as to oppose the original voltage and is known as a __?__.

A

counter EMF or back EMF

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

When a conductor is wound into a coil and placed on an iron core, the inductance is greatly decreased.

A

False, increased

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

The inductance of a coil will __?__ if the turns of wire in the coil are wound closer together.

A

increase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

If the number of turns of wire in a coil is decreased, the __?__.

A

inductance of the coil will decrease

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

The induced voltage of an inductor can limit the flow of current through the circuit in a manner similar to resistance.

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The opposition to the flow of alternating current in an inductor is called __?__.

A

inductive reactance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

The formula used to calculate inductive reactance is __?__.

A

(XL) = 2pifL

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

The unit of measurement for inductive reactance is the __?__.

A

ohm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Increasing the frequency will cause inductive reactance to increase.

A

True

17
Q

Decreasing the amount of inductance in a circuit will cause inductive reactance to __?__.

A

decrease

18
Q

Inductance in distribution circuits contributes to __?__ in the line.

A

voltage drop

19
Q

A straight piece of wire carrying an AC current does not have inductance.

A

False

20
Q

On transmission lines, the closer the lines are spaced, the __?__ the effect of inductance.

A

lower

21
Q

If 20 volts AC were connected to a coil, it would result in __?__ current than/as 20 volts DC connected to the same coil.

A

a smaller

22
Q

When a transformer is connected to an AC source, the current is limited by the inductance of the __?__.

A

primary coil

23
Q

If a transformer rated at 240 volts AC was connected to a 240 volts DC source, the __?__.

A

transformer would burn up

3-1 (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions