EXAMIANS
When the frequency of the voltage applied to a series RC circuit is increased, the phase angle
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In a series RC circuit, when the frequency and the resistance are halved, the impedance
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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 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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The voltages in Problem 4 are measured at a certain frequency. To make the capacitor voltage greater than the resistor voltage, the frequency
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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 value of the hypotenuse of a right triangle whose sides are 12 and 18?
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What is the angular difference between +j4 and –j4?
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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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