EXAMIANS
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 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 sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current
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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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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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An ohmmeter is connected across an inductor and the pointer indicates zero ohms. The inductor is
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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
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A 240 H inductor is equivalent to a
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The inductance of an iron-core coil decreases if
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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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