A \(40\) F capacitor is connected to a \(200\) V, \(50\) Hz AC supply. The rms value of the current in the circuit is, nearly:
1. \(2.05\) A
2. \(2.5\) A
3. \(25.1\) A
4. \(1.7\) A
A \(100~\Omega\) resistor is connected to a \(220~\text{V}\), \(50~\text{Hz}\) ac supply. The net power consumed over a full cycle is:
1. | \(484~\text{W}\) | 2. | \(848~\text{W}\) |
3. | \(400~\text{W}\) | 4. | \(786~\text{W}\) |
The rms value of current in an ac circuit is 10 A. The peak current in the circuit is:
1. 1.41 A
2. 14.1 A
3. 7.07 A
4. 0.707 A
A 44 mH inductor is connected to a 220 V, 50 Hz ac supply. The RMS value of the current in the circuit is:
1. 1.0 A
2. 15 A
3. 15.92 A
4. 14.29 A
Calculate the Q-value of a series LCR circuit with L = 2.0 H, C = 32 μF and R = 10 \(\Omega\).
1. 35
2. 20
3. 15
4. 25
A charged 30 µF capacitor is connected to a 27 mH inductor. What is the angular frequency of free oscillations of the circuit?
1. \(1.11 \times 10^{3} \ rad/s\)
2.\(2.11 \times 10^{3} \ rad/s\)
3.\(1.11 \times 10^{2} \ rad/s\)
4.\(1.11 \times 10^{4} \ rad/s\)
Figure shows a series LCR circuit connected to a variable frequency 230 V source. L = 5.0 H, C = 80 F, R = 40
The amplitude of current at the resonating frequency is:
1. 8.13 A
2. 3.82 A
3. 4.44 A
4. 1.41 A
Figure shows a series LCR circuit connected to a variable frequency 230 V source. L = 5.0 H, C = 80uF, R = 40
The RMS potential drop across the resistor under the resonating condition is:
1. 200 V
2. 220 V
3. 230 V
4. 0
A radio can tune over the frequency range of a portion of the MW broadcast band: (800 kHz to 1200 kHz). If its LC circuit has an effective inductance of 200 µH, what must be the range of its variable capacitor?
1. 87.8 pF−197.7 pF
2. 88.3 pF−198.8 pF
3. 89.3 pF−199.1 pF
4. 89.1 pF−196.9 pF
A series LCR circuit with R = 20 Ω, L = 1.5 H and C = 35 µF is connected to a variable-frequency 200 V ac supply. When the frequency of the supply equals the natural frequency of the circuit, what is the average power transferred to the circuit in one complete cycle?
1.2200 W
2.2000 W
3.2020 W
4. 2120 W