EXAMIANS
When the frequency of the source voltage decreases, the impedance of a parallel RC circuit
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A 120Ω resistor is in parallel with a capacitor with a capacitive reactance of 40 Ω. Both components are across a 12 V ac source. What is the magnitude of the total impedance?
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In a series RC circuit, when the frequency and the resistance are halved, the impedance
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A capacitor with 150Ω of capacitive reactance is across an ac source. The impedance, expressed in polar form, is
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What is the angular difference between +j4 and –j4?
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In a series RC circuit, 12 V(rms) is measured across the resistor and 15 V(rms) is measured across the capacitor. The rms source voltage is
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In the complex plane, the number 14 – j5 is located in the
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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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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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The complex number 6 + j6 is equivalent to
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