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Chapter 19: Q8CQ (page 694)
Will a negative charge, initially at rest, move toward higher or lower potential? Explain why.
The negative charge will go towards the higher potential.
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(a) A sphere has a surface uniformly charged with \(1.00{\rm{ }}C\). At what distance from its centre is the potential \(5.00{\rm{ }}MV\)?
(b) What does your answer imply about the practical aspect of isolating such a large charge?
How are units of volts and electron volts related? How do they differ?
Water has a large dielectric constant, but it is rarely used in capacitors. Explain why.
Find the maximum potential difference between two parallel conducting plates separated by \(0.500{\rm{ }}cm\) of air, given the maximum sustainable electric field strength in air to be \(3.0 \times {10^6}{\rm{ }}V/m\).
Sketch the equipotential lines a long distance from the charges shown in Figure \({\rm{19}}{\rm{.28}}\). Indicate the direction of increasing potential.
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