chapter 11

The voltage that is produced, when electrons flow through a coil that is opposite, and opposes the source voltage is called ______________?

CEMF

A coil has an inductance of 1 __________ when a current change of 1 __________ per second results in an induced voltage of 1 volt.

Henry ampere

A solenoid is an electric output device that converts electrical energy into ____________________ mechanical force.

linear

The formula to find one time constant for an inductor is ______________?

t=L¸R

Name 3 factors that determine the amount of induced voltage in a coil? Check the one that does not apply.

the direction of current flow

The ____________________ is the time required for current in an inductive-resistive circuit to reach 63.2% of its maximum value after power is applied to the circuit or to decrease by 63.2% (to 36.8% of maximum power) when the power is removed from the circuit.

time constant

It takes 5________________for current to reach its maximum value in a LR circuit.

time constants

A(n) ____________________ coils are used for current transformers?

toroid

The induce voltage (CEMF) is proportional to the rate of change of ________________?

current

A(n) ____________________ coil is an inductor that has coils wound in such a manner that the inductance created by one coil turn is canceled by an adjacent coil turn.

d noninductive

The ____________________ is the time curve for current in an inductive-resistive circuit.

exponential curve

What electronic component is often used in an AC circuit to prevent large voltage spikes from being produced when the current flow through an inductor is suddenly terminated

MOV

___ inductance is the effect of one coil inducing a voltage into another coil.

Mutual

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

Self

A The coefficient of coupling is the percentage of magnetic lines of __________ created by one coil that cut the windings of the second coil.

force

The unit of measurement for inductance is the ______________?

henry

Abrupt removal of power from a circuit often causes coils to fail because of ___ kick.

inductive

A(n) ___ is a passive device that stores energy in the form of a magnetic field.

inductor

A(n)______________ opposes a change of current.

inductor

The high voltage that is produce when the magnetic field collapse in an inductive coil is call_________?

kicks back spikes