Chapter 7.3, Problem 103E

A series circuit consists of a device where $L=\frac{1}{2}H$ , $R=10\Omega$ , $C=\frac{1}{50}F$ , and $E\left(t\right)=250V$ . If the initial charge on the capacitor is $0C$ and the initial current is $18A$ , find the charge and current at time $t$ .