EXAMIANS
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 inductance of an iron-core coil decreases if
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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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The current through a 120 mH coil is changing at a rate of 150 mA/s. The voltage induced across the coil is
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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 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 240 H inductor is equivalent to a
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An ohmmeter is connected across an inductor and the pointer indicates zero ohms. The inductor is
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