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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
Z = 150 angle 180° Ω
Z = 150 –90° Ω
Z = 150 angle – 90° Ω
Z = 150
Z = 150 angle 180° Ω
Z = 150 –90° Ω
Z = 150 angle – 90° Ω
Answer
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Related Question
RC Circuits
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?
4.11 V
45.6 V
0.411 V
411.3 V
4.11 V
45.6 V
0.411 V
411.3 V
Answer
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RC Circuits
What is the value of the hypotenuse of a right triangle whose sides are 12 and 18?
2.16
4.24
3.46
21.63
2.16
4.24
3.46
21.63
Answer
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RC Circuits
A positive angle of 30° is equivalent to a negative angle of
–330°
–30°
–180°
–60°
–330°
–30°
–180°
–60°
Answer
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RC Circuits
The voltages in Problem 4 are measured at a certain frequency. To make the capacitor voltage greater than the resistor voltage, the frequency
is held constant
must be decreased
has no effect
must be increased
is held constant
must be decreased
has no effect
must be increased
Answer
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RC Circuits
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
3 V
27 V
19.2 V
1.9 V
3 V
27 V
19.2 V
1.9 V
Answer
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