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  4. A capacitor and a coil in series are connected to a 6 V ac source. By varying the frequency of the source, maximum current of 600 mA is observed. If the same coil is now connected to a cell of 6 V internal resistance of 2 Ω, the current through it will be

Q. A capacitor and a coil in series are connected to a ac source. By varying the frequency of the source, maximum current of is observed. If the same coil is now connected to a cell of internal resistance of , the current through it will be

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Solution:

At resonance,

In circuit the current through the coil is

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