A 2 mF capacitor, 100 W resistor and 8 H inductor
are connected in series with an ac source
(i) What should be the frequency of the
source such that current drawn in the circuit is
maximum? What is this frequency called?
(ii) If the peak value of emf of the source is
200 V, nd the maximum current.
(iii) Draw a graph showing variation of amplitude
of circuit current with changing frequency of
applied voltage in a series LCR circuit for two
dierent values of resistance R1 and R2 (R1 > R2).
(iv) Dene the term ‘Sharpness of Resonance’.
Under what condition, does a circuit become
more selective?
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Answer:
frequency is 2
current is volt by time
graph no idea
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