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Inductors
When the current through an inductor decreases, the amount of energy stored in the electromagnetic field
doubles
remains the same
decreases
increases
doubles
remains the same
decreases
increases
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
87 A
870 mA
87 mA
337 mA
87 A
870 mA
87 mA
337 mA
Answer
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Inductors
A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current
does not change
is decreased
momentarily goes to zero
is increased
does not change
is decreased
momentarily goes to zero
is increased
Answer
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Inductors
An inductance of 0.08 μH is larger than
0.000008 H
0.0000008 H
0.000000008 H
0.00008 mH
0.000008 H
0.0000008 H
0.000000008 H
0.00008 mH
Answer
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Inductors
An inductor and a resistor are in series with a sine wave voltage source. The frequency is set so that the inductive reactance is equal to the resistance. If the frequency is increased, then
VL = VR
VL > VR
VL < VR
VR ≥ VL
VL = VR
VL > VR
VL < VR
VR ≥ VL
Answer
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Inductors
The voltage across a coil when di/dt = 20 mA/s and L = 8 H is
16 mV
2.5 mV
1.6 mV
160 mV
16 mV
2.5 mV
1.6 mV
160 mV
Answer
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