A 2 μF capacitor, charged to a p.d. of 200 V, is connected across an uncharged capacitor. If the common p.d. is 20 V, the capacitance of the second capacitor is
A. 18 μF
B. 20 μF
C. 36 μF
D. 40 μF
Answer:A
A 2 μF capacitor, charged to a p.d. of 200 V, is connected across an uncharged capacitor. If the common p.d. is 20 V, the capacitance of the second capacitor is
A. 18 μF B. 20 μF C. 36 μF D. 40 μF