EXAMIANS
A 47Ω resistor and a capacitor with 150Ω of capacitive reactance are in series across an ac source. The impedance, expressed in rectangular form, is
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For a certain load, the true power is 150 W and the reactive power is 125 VAR. The apparent power is
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When the frequency of the source voltage decreases, the impedance of a parallel RC circuit
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The complex number 6 + j6 is equivalent to
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The complex number 40 angle 55° is equivalent to
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An ac circuit consists of a resistor and a capacitor. To increase the phase angle above 45°, the following condition must exist:
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A 47Ω resistor and a capacitor with a capacitive reactance of 120 are in series across an ac source. What is the circuit impedance, Z?
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A positive angle of 30° is equivalent to a negative angle of
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When the frequency of the voltage applied to a series RC circuit is decreased, the impedance
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A 2 k resistor is in series with a 0.015 F capacitor across a 15 kHz ac source. What is the magnitude of the total impedance and the phase angle?
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