EXAMIANS
The winding resistance of a coil can be increased by
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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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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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An inductance of 0.43 mH is smaller than
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A 240 H inductor is equivalent to a
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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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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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The voltage across a coil when di/dt = 20 mA/s and L = 8 H is
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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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