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Inductors
When the current through an inductor is cut in half, the amount of energy stored in the electromagnetic field
doubles
quadruples
is quartered
does not change
doubles
quadruples
is quartered
does not change
Answer
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Related Question
Inductors
A 240 H inductor is equivalent to a
0.000240 mH inductor
240 H inductor
0.240 mH inductor
240 mH inductor
0.000240 mH inductor
240 H inductor
0.240 mH inductor
240 mH inductor
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?
400 mA
57 mA
78 mA
91 mA
400 mA
57 mA
78 mA
91 mA
Answer
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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
87 A
337 mA
870 mA
87 mA
Answer
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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 μs
0.48 s
0.48 ms
48 s
0.48 μs
0.48 s
0.48 ms
48 s
Answer
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Inductors
The following coils are in parallel: 75 H, 40 H, 25 H, and 15 H. The total inductance is approximately
14 μH
2.2 μH
155 μH
6.9 μH
14 μH
2.2 μH
155 μH
6.9 μH
Answer
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