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Electricity and Magnetism

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Charge on an Isolated Conducting Sphere

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The electric field a distance of $a=$8.3 cm from the solid conducing sphere shown in the figure below is $3.0\times 10^4$ N/C .

Created for Albert.io. Copyright 2016. All rights reserved.

If the radius of the sphere is $R=$ 3.2 cm, what is the net charge of the sphere?

A

$2.3\ \mu C$

B

$0.34\ \mu C$

C

$3.8\ \mu C$

D

$4.4\ \mu C$