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1 2 3 5 Capacity of an isolated sphere is increased n times when it is enclosed by an earthed concentric sphere The ratio of their radii would be R 2 www 2n A conducting solid sphere is joined in an electrical circuit as shown in figure 2R 2n 1 n 1 6 Two imaginary points A and B are taken inside the sphere For given conditions 2 V V 7 4 Data insufficient 1 V V 3 V V In the given circuit R 202 R 302 r 152 s 6V C 1 F and C 2 F In steady state the ratio of energy stored in the capacitors C and C is RO 1 6 9 3 8 9 4 9 9 2 9 6 There are 8 drops of a conducting fluid Each has radius r and they are charged to potential 1 volt They are then combined to form a bigger drop Find potential of big drop 1 1 V 2 4 V 3 2 V 4 8 V A B C D E and F are conducting plates each of area A and any two consecutive plates are separated by a distance d The net energy stored in the system after the switch S is closed is 1 3 ob 1000 2d Va 1 C 2 C 3 C 2 SE A 12d 2d When an additional charge of 2C is given to a capacitor energy stored in it is increased by 21 The original charge of the capacitor is 1 30 C 2 40 C 3 10 C 4 20 C Three capacitors C C and C are connected to a battery as shown in figure The three capacitors have equal capacitances Which capacitor stores the most energy V 1 8 x 10 C 3 4 x 10 C 4 All three capacitors store the same amount of energy Five identical plates of dimension 5 cm x 8 m are placed at separation of 8 85 mm from each other If they are connected through a battery which provides constant potential difference of 20V as shown then find the total charge given by battery 201 2 16 x 10 C 4 12 x 10 C

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