Question

(a) The bulb is in series with an inductor along with an a.c. source, lighting with...

(a) The bulb is in series with an inductor along with an a.c. source, lighting with certain intensity. How does the intensity of the bulb changes (i) on decreasing inductance (ii) on decreasing the frequency. Give reasons in support of your answer. (2marks)

(b) A 10Ω resistor is in series with a 20mH inductor with a 12 V a.c. supply.What is the supply frequency, when the current flowing in the circuit is 3mA?    (2marks)

(c) Draw graphs between the following physical quantities (3marks)

(i) current through resistor with frequency (ii) voltage and current through resistor

(iii) current through inductor with inductance (iv) current through capacitor with capacitance

(v) current through inductor with frequency (vi) current through capacitor with frequency

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