(i) Find the value of the phase difference between the current and the voltage in the series LCR circuit shown below. Which one leads in phase : current or voltage ?

(ii) What making any other change, find the value of the additional capacitor C, to be connected in parallel with the capacitor C, in order to make the power factor of the circuit unity.

Explanation

Calculate of value of C is to be connected in parallel.
To make power factor unity.
`X_(C)=X_(L)`
`1/(omegaC)=100, C'=10muF`
`C'=C+C_(1), 10 =2+C_(1)`
`C_(1)=8muF`