INDUCTORS QUIZ

A 2 mH, a 3.3 mH, and a 0.2 mH inductor are connected in series. The total inductance is

5.5 mH

55 mH

less than 0.2 mH

less than 5.5 mH

TRUE ANSWER : ?
YOUR ANSWER : ?

An inductance of 0.08 μH is larger than

0.000008 H

0.0000008 H

0.00008 mH

0.000000008 H

TRUE ANSWER : ?
YOUR ANSWER : ?

An ohmmeter is connected across an inductor and the pointer indicates zero ohms. The inductor is

good

open

partly shorted

shorted

TRUE ANSWER : ?
YOUR ANSWER : ?

An inductance of 0.43 mH is smaller than

43 μH

430 μH

0.05 H

0.00043 H

TRUE ANSWER : ?
YOUR ANSWER : ?

When the current through an inductor decreases, the amount of energy stored in the electromagnetic field

decreases

increases

remains the same

doubles

TRUE ANSWER : ?
YOUR ANSWER : ?

Three 15 mH inductors are in series. The total inductance is

5 mH

45 mH

15 mH

30 mH

TRUE ANSWER : ?
YOUR ANSWER : ?

The current through a 120 mH coil is changing at a rate of 150 mA/s. The voltage induced across the coil is

1.8 mV

18 mV

1.25 mV

180 mV

TRUE ANSWER : ?
YOUR ANSWER : ?

The inductance of an iron-core coil decreases if

the number of turns is decreased

the length of the coil decreases

the iron core is removed

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

A 5 mH, a 4.3 mH, and a 0.6 mH inductor are connected in parallel. The total inductance is

9.9 mH or greater than 5 mH

less than 0.6 mH

9.9 mH

greater than 5 mH

TRUE ANSWER : ?
YOUR ANSWER : ?

Two 10 H inductors are in parallel and the parallel combination is in series with a third 10 H inductor. What is the approximate total reactance when a voltage with a frequency of 7 kHz is applied across the circuit terminals?

66 kΩ

660 kΩ

219 kΩ

1.3 MΩ

TRUE ANSWER : ?
YOUR ANSWER : ?

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