Exercise: Rc Circuits
Questions for: Rc Circuits
A 2 k
resistor and a 0.002 
F capacitor are in series across an ac source. Current in the circuit is 6.50 mA. The true power is
resistor and a 0.002 F capacitor are in series across an ac source. Current in the circuit is 6.50 mA. The true power is
Answer: A
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A 47 resistor and a capacitor with 150 of capacitive reactance are in series across an ac source. The impedance, expressed in rectangular form, is
resistor and a capacitor with 150 of capacitive reactance are in series across an ac source. The impedance, expressed in rectangular form, is
A:
Z = 47 + j150
+ j150 B:
Z = 47 – j150
– j150 C:
Z = 197
D:
Z = 103
Answer: B
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A 120 resistor is in parallel with a capacitor with a capacitive reactance of 40 . Both components are across a 12 V ac source. What is the magnitude of the total impedance?
resistor is in parallel with a capacitor with a capacitive reactance of 40 . Both components are across a 12 V ac source. What is the magnitude of the total impedance?
A:
37.9
B:
3.7
C:
14,400
D:
4,800
Answer: A
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The complex number 40
55° is equivalent to
55° is equivalent to
Answer: D
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A 12 k resistor is in series with a 0.02 F capacitor across a 1.2 kHz ac source. If the current is expressed in polar form as I = 0.30° mA, what is the source voltage expressed in polar form?
resistor is in series with a 0.02 F capacitor across a 1.2 kHz ac source. If the current is expressed in polar form as I = 0.30° mA, what is the source voltage expressed in polar form?
Answer: D
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