EXAMIANS
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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A resistor and a capacitor are in series across a 20 V ac source. Circuit impedance is 4.33 k. Current flow in the circuit is
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In the complex plane, the number 14 – j5 is located in the
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The complex number 40 angle 55° is equivalent to
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A 6 kHz sinusoidal voltage is applied to a series RC circuit. The frequency of the voltage across the resistor is
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A 12 kΩ resistor is in series with a 0.02 μF capacitor across a 1.2 kHz ac source. If the current is expressed in polar form as I = 0.3 angle 0° mA, what is the source voltage expressed in polar form?
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A 2 kΩ resistor and a 0.002 μF capacitor are in series across an ac source. Current in the circuit is 6.50 mA. The true power is
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What is the angular difference between +j4 and –j4?
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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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A capacitor with 150Ω of capacitive reactance is across an ac source. The impedance, expressed in polar form, is
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