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Electricity and Magnetism

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Electric Field of a Charged Isolated Conductor

EANDM-NU4573

A charge of $q=+3.0\mu C$ is transferred to the solid spherical conductor shown in the figure below.

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If the radius of the sphere is $R=$ 3.2 cm, what is the magnitude of the electric field a distance $a=$8.3 cm away from the sphere?

A

$2.0 \times 10^{4} N/C$

B

$2.6 \times 10^{5} N/C$

C

$3.9 \times 10^{4} N/C$

D

$2.4 \times 10^{5} N/C$