MHT CET Physics question
Two spheres A and B are having radii 5 cm and 10 cm carrying charges of +5 C and +15 C respectively, distributed uniformly. Their centres are separated by 80 cm. The electric field on the line joining the centres of the sphere will be zero at a distance from the centre of A equal to
Answer: (D)
Solution
Outside the spheres they act as point charges; with from A, gives , so
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