I have a series resonant circuit that has a Capacitor, Resistor and Inductor.

The first question was to find the Resonant frequency which is no problem. Question 2 is to find the current at resonance. Therefore using the fact that XL=XC at resonance then Z must be equal to R. So I then just used I= Vin/R.

The third question was to vind the voltage across the capacitor. I used that

Q= XL/R = VC/V Therefore VC = XL x V / R. AM I along the right lines with those? Each question was worth 4 marks(Mock Exam)

The final part of the question for 8 marks asks that if a capacitor of 1nF is added to the circuit in parallel, how does the circuit operation change? (No calculations are required)

Now I answered that the value of XC would change therefore XC would no longer be equal to XL so the circuit would no longer be at resonance. To work out the new resonance then a new formula for paralell resonance will have to be used.

Now this question is worth 8 marks so I really don't think I have answered it fully enough?

Anyone got anything to add?

Cheers