A spherical conductor of radius 10 cm has a charge of 3.2 10 -7 C distributed uniformly. What is the magnitude of electric field at a point 15 cm from the centre of the sphere? ( 1 4 0 =9 10 9 Nm 2/C 2 )

1. A. 1.28 10 5 N/C
2. B. 1.28 10 6 N/C
3. C. 1.28 10 7 N/C
4. D. 1.28 10 4 N/C

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