EXAMIANS
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 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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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, 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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The inductance of an iron-core coil decreases if
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The winding resistance of a coil can be increased by
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A 240 H inductor is equivalent to a
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A 320 H coil is in series with a 3.3 k resistor. How long does it take for current to build up to its full value?
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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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An ohmmeter is connected across an inductor and the pointer indicates zero ohms. The inductor is
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