$7.).$ In a$132$ kV system reactance and capacitance up to the location up to the location of CB are $522$ and $0\mathrm{.}02$uF$,$ respectively. A resistance of $500$S$2$ is connected across the breaker of CB$.$ Determine $($a$)$ natural frequency of oscillations $($b$)$ damped frequency of oscillations $($c$)$ critical value of resistance $8).$ The short circuit Current of $132$kV system $8000$KA$.$ The current occurs at $2\mathrm{.}5\%$ of peak value of current. Calculate the prospective value of the voltage which will appear across the contact of the of CB$.$ The value of stray capacitance to the earth is $100$pF$.$