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.
Over 30 million students worldwide already upgrade their learning with Vaia!
All the tools & learning materials you need for study success - in one app.
Get started for free
Can different equipotential lines cross? Explain.
Calculate the voltage applied to a \({\bf{2}}{\bf{.00}}\;{\bf{\mu F}}\)capacitor when it holds \({\bf{3}}{\bf{.10}}\;{\bf{\mu C}}\) of charge.
The naturally occurring charge on the ground on a fine day out in the open country is \( - 1.00n{\rm{ }}C/{m^2}\).
(a) What is the electric field relative to ground at a height of \(3.00{\rm{ }}m\)?
(b) Calculate the electric potential at this height.
(c) Sketch electric field and equipotential lines for this scenario.
Give the reason why a dielectric material increases capacitance compared with what it would be with air between the plates of a capacitor. What is the independent reason that a dielectric material also allows a greater voltage to be applied to a capacitor? (The dielectric thus increases \(C\) and permits a greater \(V\).
Consider a battery used to supply energy to a cellular phone. Construct a problem in which you determine the energy that must be supplied by the battery, and then calculate the amount of charge it must be able to move in order to supply this energy. Among the things to be considered are the energy needs and battery voltage. You may need to look ahead to interpret manufacturer's battery ratings in ampere-hours as energy in joules.
What do you think about this solution?
We value your feedback to improve our textbook solutions.
