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Inductors

Inductors
An 18 V power supply is connected across a coil with a winding resistance of 180 . Current flow in the coil is

100 mA
10 mA
1 A
1 mA

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Inductors
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?

660 kΩ
1.3 MΩ
219 kΩ
66 kΩ

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

doubles
decreases
increases
remains the same

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

less than 0.2 mH
55 mH
less than 5.5 mH
5.5 mH

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

partly shorted
good
shorted
open

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Inductors
A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current

is decreased
does not change
is increased
momentarily goes to zero

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