EXAMIANS
The following coils are in parallel: 75 H, 40 H, 25 H, and 15 H. The total inductance is approximately
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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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An ohmmeter is connected across an inductor and the pointer indicates zero ohms. The inductor is
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A 240 H inductor is equivalent to a
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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 inductor, a 1 k resistor, and a switch are connected in series across a 6 V battery. At the instant the switch is closed, the inductor voltage is
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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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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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The voltage across a coil when di/dt = 20 mA/s and L = 8 H is
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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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