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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

1 mA
100 mA
10 mA
1 A

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Inductors
An inductance of 0.08 μH is larger than

0.0000008 H
0.000008 H
0.000000008 H
0.00008 mH

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Inductors
The inductance of an iron-core coil decreases if

the iron core is removed
None of these
the number of turns is decreased
the length of the coil decreases

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

shorted
partly shorted
open
good

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Inductors
An inductor and a resistor are in series with a sine wave voltage source. The frequency is set so that the inductive reactance is equal to the resistance. If the frequency is increased, then

VL = VR
VR ≥ VL
VL < VR
VL > VR

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

greater than 5 mH
9.9 mH
9.9 mH or greater than 5 mH
less than 0.6 mH

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