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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
66 kΩ
1.3 MΩ
219 kΩ
660 kΩ
66 kΩ
1.3 MΩ
219 kΩ
Answer
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Related Question
Inductors
Five inductors are connected in series. The lowest value is 8 μH. If the value of each inductor is twice that of the preceding one, and if the inductors are connected in order of ascending values, the total inductance is
64 μH
32 μH
248 μH
8 H
64 μH
32 μH
248 μH
8 H
Answer
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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
9.9 mH or greater than 5 mH
9.9 mH
greater than 5 mH
less than 0.6 mH
9.9 mH or greater than 5 mH
9.9 mH
greater than 5 mH
less than 0.6 mH
Answer
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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
doubles
decreases
increases
remains the same
Answer
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Inductors
A switch, a 220 Ω resistor, and a 60 mH inductor are in series across a 20 V battery. What is the current through the inductor two time constants after the switch is closed?
57 mA
78 mA
91 mA
400 mA
57 mA
78 mA
91 mA
400 mA
Answer
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Inductors
An inductance of 0.43 mH is smaller than
430 μH
0.05 H
0.00043 H
43 μH
430 μH
0.05 H
0.00043 H
43 μH
Answer
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