(b) $\therefore\frac{1}{C_{s}} = \frac{1}{2} + \frac{1}{1} = \frac{3}{2}$ $C_{s} = \frac{2}{3}F$ $Q = C_{s}V = \frac{2}{3} \times 12 = 8C$ $V_{1} = \frac{Q}{C_{1}} = \frac{8}{2} = 4V$
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.