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Inductors

Inductors
An inductance of 0.43 mH is smaller than

430 μH
43 μH
0.00043 H
0.05 H

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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 A
337 mA
870 mA
87 mA

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Inductors
A 240 H inductor is equivalent to a

0.240 mH inductor
240 H inductor
240 mH inductor
0.000240 mH inductor

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

180 mV
18 mV
1.8 mV
1.25 mV

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Inductors
A 320 H coil is in series with a 3.3 k resistor. How long does it take for current to build up to its full value?

0.48 ms
48 s
0.48 s
0.48 μs

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

increases
remains the same
doubles
decreases

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