Inductors MCQs

Question 1

When an electromagnet reaches maximum strength, it is considered to be:

Accepted Answer

at saturation

Answer

in field condition

Answer

inhibited

Answer

at field strength

Question 2

You could decrease the time constant of an RL circuit by

Accepted Answer

adding an inductor in series with the circuit inductance

Answer

adding a resistor in parallel with the circuit resistance

Answer

decreasing the amplitude of the input voltage

Answer

exchanging the position of the resistor and inductor in the circuit

Question 3

Indication of transformer primary and secondary voltage relationships is accomplished by:

Accepted Answer

dot notation

Answer

color-coded wires

Answer

black, rather than gray, casings

Answer

winding ratios

Question 4

As a generator armature passes the 270 degree point, the induced voltage is:

Accepted Answer

at maximum negative

Answer

between maximum negative and zero

Answer

at maximum positive

Answer

between zero and maximum positive

Question 5

A value of "ten to the eighth power magnetic lines of force" is for the term:

Accepted Answer

weber

Answer

field

Answer

flux

Answer

coulomb

Question 6

A change of one ampere per second in an inductor that induces a voltage of one volt is considered as which unit value?

Accepted Answer

a henry

Answer

a lenz

Answer

an ohm

Answer

a farad

Question 7

What is the name of the part inside a relay that is moved by the action of the electromagnet?

Accepted Answer

armature

Answer

conductor

Answer

contacts

Answer

solenoid

Question 8

If the primary of a 4:1 turns transformer dissipates 5 W, what is the secondary power?

Accepted Answer

5.0 W

Answer

1.25 pW

Answer

9.5 W

Answer

20.0 mW

Question 9

The unit of flux density is:

Accepted Answer

a tesla

Answer

magnetomotive force

Answer

a weber

Answer

a maxwell