Two metallic spheres of radii 1 cm and 3 cm are given charges of -1 x 10-2 C and 5 x 10-2 C, respectively. If these are connected by a conducting wire, the final charge on the bigger sphere is :
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a
4 x 10-2 C
b
1 x 10-2 C
c
2 x 10-2 C
d
3 x 10-2 C
answer is D.
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Detailed Solution
Total charge = -1 x 10-2 C + 5 x 10-2 C = 4 x 10-2 CAs, q1 : q2=r1 : r2=1 : 3So, q2=34 x 4 x 10-2C=3 x 10-2C
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Two metallic spheres of radii 1 cm and 3 cm are given charges of -1 x 10-2 C and 5 x 10-2 C, respectively. If these are connected by a conducting wire, the final charge on the bigger sphere is :