See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

Charge is initially distributed as shown in figure. Now after connecting the battery, potential difference across the plates of the capacitor should also become 40 V in steady state. AITS-FT-VII-(Paper-2)-PCM (Sol.)-JEE(Advanced)/18 FIITJEE Ltd., FIITJEE House, 29-A, Kalu Sarai, Sarvapriya Vihar, New Delhi -110016, Ph 46106000, 26569493, Fax 26513942 website: www.fiitjee.com 8 Hence, Qf = CV = (1.5) (40) C = 60 C (Charge on inner surface) Hence, charge supplied by battery is 45C So, work done by battery, W = (Q) (V) = (45C) (40V) = 1800 J So, answer is 1800. (1) 30C (2) 15C 15C –15C 15C