3. A series circuit composed of a 0.2 henry inductor and a 74 micro farad capacitor is connected to a 60V variable frequency source. At what frequency is the current be 4 amperes with lagging power factor?
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- Which of the following is the capacitance of an 88-microfarad and a 108-microfarad starting capacitor connected in series? 196 microfarad 96 microfarad 48 microfarad 40 microfaradA series circuit composed of a 0.2 Henry inductor and a 74-microfarad capacitor is connected to a 60V variable frequency source. At what frequency is the current be 6 amperes with a lagging power factor?7. A series circuit composed of 0.2 Henry inductor and a 74 Microfarad capacitor. This combination is connected to a 60V variable frequency source. At what frequency is the current be 4A with lagging power factor?
- A variable capacitor is connected in parallel with an impedance coil having a resistance of 30 ohms and an inductance of 18 mh. a) For what value of C will the circuit be resonant if a 100 V, 350 Hz source is applied? b) What will be the line current under this condition?An impedance coil having a resistance of 15 ohms and an inductance of 0.08 henry is connected in series with a variable capacitor. If a 117 volt, 60 cycle source is connected to the circuit, what will be the capacitance of the capacitor and the current (a) when the circuit is in resonance? (b) when the voltage drop across the coil and the capacitor are equal?A 20,000-cycle source is connected to a series circuit consisting of a 50-ohm resistor and a 0.266 microfarad capacitor. An impedance coil, whose resistance and inductance are 25 ohms and 0.191 mh, respectively, is then connected in series with a variable resistor, after which the combination is paralleled with R-C circuit. What value of the variable resistor will the entire circuit be in resonance?
- An impedance coil having a resistance of 25 ohms and an inductance of 20mH is connected in parallel with a variable capacitor. (a) For what value of C will the circuit be resonant if 90V 400cycle source is applied? (b) What will be the line current under this condition?An inductor is attached to an AC voltage source. Which change will result in a halving of the current?A. Halving the voltage and doubling the frequencyB. Doubling the frequencyC. Halving the frequencyD. Doubling the voltage and halving the frequencyA series circuit consisting of a 16 – ohm resistor, a 0.1275-henry inductor, and a variable capacitor is connected to a 116 volt 50 cycle source. (a) for thecondition of resonance calculate the capacitance, current, and voltage dropacross the capacitor; (b) determine the capacitance, current, and voltage dropacross the capacitor when the voltage drop across the latter is a maximum. draw circuit diagram
- A coil of resistance 25 ohm and inductance 100mH is connected in series with a capacitance of 0.12 F across a 200V , variable frequency supply . Calculate : 1) draw the sinusodial waveform for VL, VC, VR of the circuit and explain the phasor diagram and how they are produced. 2) calculate resonant frequency 3) the current at resonance 4) the Q factorA capacitance of 50microfarad and an inductance of 0.2025 Henry are connected in series. If the resistance of the circuit is negligible find the frequency at which resonance occursA series circuit composed of a 0.2 Henry inductor and a 74-microfarad capacitor is connected to a 60V variable frequency source. At what frequency is the current be 6 amperes with a lagging power factor? Ans: ____ Hz