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RC Circuits

RC Circuits
The complex number 6 + j6 is equivalent to

8.4845°
8.4890°
645°
3645°

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RC Circuits
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?

707 and θ = –19.5°
734 and θ = –38.9°
73.4 and θ = –19.5°
2121 and θ = –19.5°

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RC Circuits
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?

129Ω
12.9Ω
167Ω
73Ω

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RC Circuits
In the complex plane, the number 14 – j5 is located in the

first quadrant
third quadrant
second quadrant
fourth quadrant

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RC Circuits
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?

14400Ω
4800Ω
37.9Ω
3.7Ω

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RC Circuits
When the frequency of the source voltage decreases, the impedance of a parallel RC circuit

increases
does not change
decreases to zero
decreases

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