EXAMIANS
Three 15 mH inductors are in series. The total inductance is
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An 18 V power supply is connected across a coil with a winding resistance of 180 . Current flow in the coil is
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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?
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A 2 mH, a 3.3 mH, and a 0.2 mH inductor are connected in series. The total inductance is
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A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current
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A 5 mH, a 4.3 mH, and a 0.6 mH inductor are connected in parallel. The total inductance is
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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
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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?
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When the current through an inductor is cut in half, the amount of energy stored in the electromagnetic field
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The following coils are in parallel: 75 H, 40 H, 25 H, and 15 H. The total inductance is approximately
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