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A192008 Pages: 3

Explain parallel resonance and draw graphs of Z, Xi and ೫೧ against frequency
Define bandwidth of a resonant circuit. Give the relationship of quality factor in
terms of bandwidth and resonant frequency.

Module VI
The total power consumed in a balanced star connected load is 20kW at 0.8 pf
lag when supplied from a three phase 400 V, 50 Hz source. Calculate the line
current, resistance and inductance of the load impedance.
A balanced delta connected load connected across a 440V, 50 Hz three phase

supply draws a line current of 16 A which lags behind the phase voltage by an
angle of 36.86°. Calculate the impedance of the load, phase current, power factor,
and total power.

A 220V, 50Hz, 3 phase voltage is applied to a balanced delta connected load of
phase impedance (6--8]) ൨. Find the line currents and power consumed per phase.

Also draw the phasor diagram.

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