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Inductors
A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current
momentarily goes to zero
is increased
does not change
is decreased
momentarily goes to zero
is increased
does not change
is decreased
Answer
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Related Question
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
337 mA
87 mA
870 mA
87 A
337 mA
87 mA
870 mA
87 A
Answer
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Inductors
An inductance of 0.43 mH is smaller than
430 μH
0.00043 H
0.05 H
43 μH
430 μH
0.00043 H
0.05 H
43 μH
Answer
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Inductors
A 2 mH, a 3.3 mH, and a 0.2 mH inductor are connected in series. The total inductance is
5.5 mH
55 mH
less than 5.5 mH
less than 0.2 mH
5.5 mH
55 mH
less than 5.5 mH
less than 0.2 mH
Answer
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Inductors
The voltage across a coil when di/dt = 20 mA/s and L = 8 H is
160 mV
2.5 mV
1.6 mV
16 mV
160 mV
2.5 mV
1.6 mV
16 mV
Answer
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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
8 H
32 μH
64 μH
248 μH
8 H
32 μH
64 μH
248 μH
Answer
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