What is the electric field 20 cm from its center

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A hollow conducting sphere of radius 15 cm has a net charge of -3 µC on its surface. What is the electric field 20 cm from its center?

Reference no: EM131227161

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What is the electric field 20 cm from its center : A hollow conducting sphere of radius 15 cm has a net charge of -3 µC on its surface. What is the electric field 20 cm from its center?
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