Question

Two 2.0cm x 2.0cm metal electrodes are spaced 1.1 mm apart and connected by wires to the terminals of a 9.0 V battery. Part A What is the charge on each electrode? Express your answer to two significant figures and include the appropriate units. Qi29 pC Previous Answers Submit Correct Part B What is the potential difference between electrodes? Express your answer to two significant figures and include the appropriate units AV 9.0 V Previous Answers Submit Correct

Only part D please. Thanks!

Answer 1

Here we apply concept of parallel plate capacitor and charge conservation on isolated material.

+re (D) Area of each plate, A = 20cm XQ-0CM - A = 4.0cm² Here wires are disconnected from battery & electrodes are seperated by insulating handles to new seperation, d' = 2.2 mm New Capacitance, c' = EA c' = 8854 *102c? (4x1642) 2.2 *10-3m » c' = 1.61x10-12 farad or lc'= 1.61 pF As charge is conserved so final charge on plates will have same magnitude Q = 29p Foulomb Using formula Og = c'ávf - 29x1612c 1.61 X1012 C - Aug = 18 volt