A 3.2 cm -diameter isolated metal sphere carries a net charge of 0.80 C . Part A

Question

A 3.2 cm -diameter isolated metal sphere carries a net charge of 0.80 C .

Part A

What is the potential at the sphere's surface?

Express your answer using two significant figures.

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Part B

If a proton were released from rest at the sphere's surface, what would be its speed far from the sphere?

Express your answer using two significant figures.

A 3.2 cm -diameter isolated metal sphere carries a net charge of 0.80 C .

Part A

What is the potential at the sphere's surface?

Express your answer using two significant figures.

V =   kV  

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Part B

If a proton were released from rest at the sphere's surface, what would be its speed far from the sphere?

Express your answer using two significant figures.

v =   m/s  

Explanation / Answer

Part A)

V = kq/R

substituting values weget

V = 225 kV

b)

conserving energy

eV = 0.5xmxV^2

e = 1.6x10^-19 C

substituting values m = mass of proton

V = 6566107.86 m/sec

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