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INDUCTORS

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

is increased
is decreased
momentarily goes to zero
does not change

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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
219 kΩ
66 kΩ
1.3 MΩ

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

shorted
open
good
partly shorted

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Inductors
Two inductors, L1 and L2, are in parallel. L1 has a value of 25 H and L2 a value of 50 H. The parallel combination is in series with L3, a 20 H coil. The entire combination is across an ac source of 60 Vrms at 300 kHz. The total rms current is

87 mA
870 mA
337 mA
87 A

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Inductors
An inductor, a 1 k resistor, and a switch are connected in series across a 6 V battery. At the instant the switch is closed, the inductor voltage is

12 V
6 V
4 V
0 V

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