A uniformly charged conducting sphere of radius 9 m has a surface charge density of $10 C / m^{2}$ . What is the energy stored inside the sphere (i.e. from 0-R)?

9MJ

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90MJ

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900KJ

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Solution

The correct option is C 0J
Remember that for a solid conductor, there is no field inside it. Hence the energy stored inside the sphere will always be zero.

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10 C / m^{2}

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A uniformly charged conducting sphere of 2.4 m diameter has a
surface charge density of 80.0 $μ C / m^{2}$ .
Find the charge on the sphere.

What is the total electric flux leaving the surface of the
sphere?

R = 1 m

q = \frac{1}{9}

n C

4.4 m

60 μ C

m^{- 2}

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