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(Solved): 3a 3b 3c The following impedances are connected in series across a 50V, 18 kHz supply: i. A 12 Q2 ...



3a
3b
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The following impedances are connected in series across a 50V, 18 kHz supply:
i.
A 12 Q2 resistor,
ii.
A coil with a

3a 3b 3c The following impedances are connected in series across a 50V, 18 kHz supply: i. A 12 Q2 resistor, ii. A coil with a resistance of 20 and inductance of 150 µH. a. Draw the circuit diagram, b. Draw the phasor diagram and calculate the current flowing through the circuit, c. d. e. Calculate the phase angle between the supply voltage and the current, Calculate the voltage drop across the resistor, Draw the phasor diagram and calculate the voltage drop across the coil and its phase angle with respect to the current. A coil of negligible resistance and inductance 120 mH is connected in series with a capacitance of 10 ?F and a resistance of 28 Q across a 60 V, variable frequency supply. a. Draw the circuit diagram b. Calculate the resonant frequency, c. Calculate the current at resonance, d. Determine the voltage across the inductor at resonance, e. Determine the voltage across the capacitor at resonance, f. Calculate the Q factor for the circuit. A circuit consisting of a capacitor in series with a resistor takes 120 W at a power factor of 0.65 from a 400 V, 50 Hz supply. Find: a. Draw the circuit diagram, b. Draw the power triangle and calculate the current flowing in the circuit, c. Calculate the phase angle between the current and the supply voltage, d. Calculate the impedance of the circuit, e. Calculate the value of the resistor, f. Draw the impedance triangle and calculate the value of the capacitor.


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