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RC Circuits

RC Circuits
What is the value of the hypotenuse of a right triangle whose sides are 12 and 18?

4.24
2.16
3.46
21.63

ANSWER DOWNLOAD EXAMIANS APP

RC Circuits
When the frequency of the voltage applied to a series RC circuit is decreased, the impedance

increases
doubles
remains the same
decreases

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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?

37.9Ω
4800Ω
3.7Ω
14400Ω

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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?

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

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RC Circuits
A 470 resistor and a 0.2 F capacitor are in parallel across a 2.5 kHz ac source. The admittance, Y, in rectangular form, is

318.3
3.14 mS + j2.12 mS
2.12 mS + j3.14 mS
212

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RC Circuits
A capacitor with 150Ω of capacitive reactance is across an ac source. The impedance, expressed in polar form, is

Z = 150 –90° Ω
Z = 150 angle – 90° Ω
Z = 150 angle 180° Ω
Z = 150

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