EXAMIANS
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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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 voltage across a coil when di/dt = 20 mA/s and L = 8 H is
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The winding resistance of a coil can be increased by
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Five inductors are connected in series. The lowest value is 8 μH. If the value of each inductor is twice that of the preceding one, and if the inductors are connected in order of ascending values, the total inductance is
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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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When the current through an inductor is cut in half, the amount of energy stored in the electromagnetic field
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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 5 mH, a 4.3 mH, and a 0.6 mH inductor are connected in parallel. The total inductance is
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