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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
870 mA
87 mA
337 mA
87 A
870 mA
87 mA
337 mA
Answer
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Related Question
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
less than 5.5 mH
less than 0.2 mH
55 mH
5.5 mH
less than 5.5 mH
less than 0.2 mH
55 mH
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
is decreased
does not change
is increased
momentarily goes to zero
is decreased
does not change
is increased
momentarily goes to zero
Answer
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Inductors
An inductance of 0.08 μH is larger than
0.000000008 H
0.0000008 H
0.00008 mH
0.000008 H
0.000000008 H
0.0000008 H
0.00008 mH
0.000008 H
Answer
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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
1.8 mV
1.25 mV
18 mV
180 mV
1.8 mV
1.25 mV
18 mV
180 mV
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
VR ≥ VL
VL > VR
VL < VR
VL = VR
VR ≥ VL
VL > VR
Answer
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