A series L–R–C circuit has a supply input of 5 volts. Given that inductance, L = 5 mH, resistance, R = 75ohm and capacitance, C = 0.2µF, determine (a) the resonant frequency, (b) the value of voltage across the capacitor at the resonant frequency, (c) the frequency at which the p.d. across the capacitance is a maximum

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A series LRC circuit has a supply input

of 5 volts. Given that inductance, L = 5 mH,

resistance, R = 75ohm and capacitance, C =

0.2µF, determine (a) the resonant frequency,

(b) the value of voltage across the capacitor

at the resonant frequency, (c) the frequency

at which the p.d. across the capacitance is a

maximum and (d) the value of the maximum

voltage across the capacitor.

A capacitor having a Q-factor of 250 is con

nected in series with a coil which has a

Q-factor of 80. Calculate the overall Q-factor

of the circuit.

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