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WorksheetsAC Fundamentals - RL and RC
Total questions: 14
Worksheet time: 17mins
A series RC circuit has ∣VR∣ = 12 V and ∣VC∣ = 5 V. The magnitude of the supply voltage is:
-7 V
7 V
13 V
17 V
At what frequency will the output voltage vo(t) in
Fig be equal to the input voltage v(t) ?
0 rad/s
1 rad/s
4 rad/s
∞ rad/s
A 47 Ω resistor is in series with an inductive reactance of 120 Ω across an ac source. The impedance, expressed in polar form, is
47∠68.6°
120∠68.6°
129∠31.4°
129∠68.6°
The impedance of a capacitor increases with
increasing frequency.
True
False
When the frequency is decreased, the impedance of a parallel RL circuit Increases
True
False
The power consumed in a pure inductive circuit is (a)
When the frequency is decreased, the impedance of a parallel RL circuit Increases
True
False
An AC voltage source supplies a 500Hz, 10V rms signal to a 2kΩ resistor in series with a 0.1µF capacitor as shown in figure. Find the total impedance.
3750.6 Ω
3760.6 Ω
3780.6 Ω
3790.6 Ω
An AC voltage source supplies a 500Hz, 10V rms signal to a 2kΩ resistor in series with a 0.1µF capacitor as shown in figure. Find the voltage across the capacitor in the circuit
7 V
7.5 V
8 V
8.5 V
Impedance is a complex quantity having the real part as _______ and the imaginary part as ______
resistance, reactance
reactance, resistance
A capacitor with 125 Ω of capacitive reactance is across an ac source. The impedance, expressed in polar form, is
Z = 125 Ω
Z = 125 ∠90° Ω
Z = 125 ∠-90°Ω
Z = 125 ∠180°Ω
A reactance having an inductor of 0.15 H is connected in series with 10 Ω resistance. What will be the inductive reactance?
48.15 Ω
47.1 Ω
1.5 Ω
The capacitive reactance of an electric circuit is 50 Ohms. The frequency of supply becomes doubled. What is the new capacitive reactance?
200 Ohms
100 Ohms
50 Ohms
25 Ohms
The inductive reactance of an electric circuit is 200 Ohms. The frequency of supply becomes doubled. What is the new inductive reactance?
50 Ohms
100 Ohms
200 Ohms
400 Ohms
