DC Circuit Inductance Chapter 11

Precision inductors-have tolerances of plus or negative ________%

1

For applications in electrical and electronica equipment, the length of an inductors coil is generally not greater than ________ times the diameter or width.

10

A maximum current rating is typically given for inductors of ______H and greater.

15

Radio frequency chokes are designed for low Impedance over small frequency ranges?

False

The core material used in an inductor typically has no effect on the inductance?

False

The four groups of coil styles are single layer coil, multi layer coil, pancake coil, and Chip coil?

False

The same number of turns on a longer length core has the same inductance as those on a shorter length core?

False

Molded inductors May have air, powered iron, or _______ Cores.

Ferrite

Hey solenoid is an electric output device that converts electrical energy into ________ mechanical force.

Linear

A ______ inductor is usually covered in plastic with a conductor at each end for connecting or soldering into a circuit?

Molded

_________ inductors are inductors The most resemble resistors and have color codes to indicate their value.

Molded

The total inductance of three and inductors connected in series with inductance values of 2H, 5H, and 10 H is _______ H.

17

With an inductor if coils are wound on a closed core, inductance is increased by about ________ times over the inductance of a straight core.

2000

The rate of change in current for a circuit with source voltage of 12 V and then inductance of 0.5 H is ______ A/sec.

24

The rate of change in current for a circuit with a source voltage of 120 V and an inductance of 25H is ________ A/sec.

4.8 VT/L

Inductance is affected by all the following except core _______.

Age

High induced voltage is an energy release caused by the _________ in an inductive circuit

Coil

_______ Force always opposes current change in a conductor.

Counter electromotive

____________ is the property of a conductor to oppose any change in current.

Counter electromotive force

The _______ is the percentage of magnetic lines of force created by one coil that cuts the windings of the second coil.

Coupling

A greater number of coil layers on a core will produce a lower inductance?

False

A large diameter core has less inductance than a small diameter core?

False

A resistive circuit contains only inductance?

False

A variometer consist of to movable coils?

False

Four coils with iron cores, the permeability is constant?

False

High value inductors are use for a higher frequency application such as radio and television circuits?

False

Inductance of 1H or less is unsuitable for most circuit applications involving frequencies higher than the audio range of 15 Hz to 20 Hz?

False

Inductive Reactance is the opposition of an inductor to direct current?

False

Inductor coils are typically un insulated?

False

Inductors are only connected in series?

False

Inductors are usually rated in terms of inductance measured in ohms?

False

Inductors used an electrical and electronically equipment typically have tolerances of 5%

False

Multi layer coils are referred to as solenoids?

False

Mutual inductance is measured in gauss?

False

The ______ is the unit of inductance equal to the voltage induced per rate of current change.

Henry

An _______ inductive Circuit has an inductor connected to a battery through a switch.

Ideal

An ______ Circuit is a Circuit that has an ideal inductor connected to a battery through a switch.

Ideal inductive

When inductors are connected in parallel, total circuit current ________.

Increases

Abrupt removal of power from a circuit often causes coil to fail because of ________ kick.

Inductive

___________ is the energy release in a coil any time the inductive current is abruptly stopped or reversed.

Inductive kick

An ______ is a passive device that stores energy in the form of a magnetic field?

Inductor

A ______ is the unit for energy management.

Joule

An _______ coil has more than one layer of turns in his wound on an air core form.

Multi layer

An ______ is a coil that has more than one layer of turns in his wound on an air core form.

Multi-layer

_________ inductance is the fact of one coil inducing a voltage into another coil.

Mutual

__________ is the effect of one coil inducing a voltage into another coil?

Mutual inductance

An _______ is an inductor that has coils wound in such a high manner that the inductance created by one coil turn is canceled by an adjacent coil turn.

Non inductive coil inductor

A ______ coral is a short quarrel with only a few conductor turns along its length.

Pancake

The ability of a material to carry magnetic lines of force is referred to as _______.

Permeability

An _________ inductive circuit has both resistance and inductance.

Practical

Molded inductors are sometimes referred to as ________ inductors.

Radial

An ______ choke is an inductor for high impedance over large frequency ranges.

Radio frequency

Inductive _________ is the opposition of an inductor to AC.

Reactance

_______ is the property of a conductor to induce voltage within itself due to changes in current.

Self inductance

An inductor _____ prevents the magnetic field of a coil from escaping in affecting other circuits.

Shield

A ______ inductor is an inductor contained in a shield composed of a low reluctance magnetic material brought to ground potential.

Shielded

Unlike other types of inductor coils, the magnetic field of an ______ coil is confined to its core.

Toroid

A coiled conductor has more inductance than a straight conductor?

True

A pancake coil is also known as a flat spiral coil?

True

And inductor may be shielded in an electrical circuit to prevent the interaction of magnetic fields?

True

Counter electric motor force is also referred to as back electromotive force?

True

Electromotive force is defined as electrical pressure applied to a circuit?

True

Ideal inductive Circuits a Circuits that have no resistance or Capacitance and are purely inductive?

True

In actual electrical applications, it is nearly impossible to attain a coefficient of coupling of 1?

True

Mutual inductance is measured and Henry's?

True

Noninductive coil inductors can be used in an application that requires a circuit to be resistive in nature?

True

On a radio frequency Choke, a series of four dots may be used instead of bands to indicate inductance and tolerance for small units?

True

Permeability may be expressed as the ratio of the number of magnetic lines of force that pass through a given type of material as compared to the number of magnetic lines of force that pass-through air of the same area?

True

Realistically, some resistance and capacitance are always present in an ideal inductive circuit?

True

Single layer coils are also referred to as solenoids?

True

The Maxwell is a unit of inductance equal to the amount of voltage induced per rate of current change?

True

The stronger the magnetic field generated by and doctors coil, the greater the inductance value?

True

Unlike other coils, the magnetic field of a Toroid coil is confined to its core?

True

Wheeler's formula is the formula used to determine inductance for each inductor coil style?

True

An _______ inductor has an inductance varied by its core.

Variable

An ________ is an inductor that consists of two coils, one fixed and one movable.

Variometer