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Chapter 21: Problem 26
How many electrons are required to yield a total charge of 1.00 C?
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Why does a garment taken out of a clothes dryer sometimes cling to your body when you wear it?
Two point charges lie on the \(x\) -axis. If one point charge is \(6.0 \mu C\) and lies at the origin and the other is \(-2.0 \mu C\) and lies at \(20.0 \mathrm{~cm}\), at what position must a third charge be placed to be in equilibrium?
Three 5.00-g Styrofoam balls of radius \(2.00 \mathrm{~cm}\) are coated with carbon black to make them conducting and then are tied to 1.00 -m-long threads and suspended freely from a common point. Each ball is given the same charge, q. At equilibrium, the balls form an equilateral triangle with sides of length \(25.0 \mathrm{~cm}\) in the horizontal plane. Determine \(q\)
From collisions with cosmic rays and from the solar wind, the Earth has a net electric charge of approximately \(-6.8 \cdot 10^{5} \mathrm{C} .\) Find the charge that must be given to a \(1.0-\mathrm{g}\) object for it to be electrostatically levitated close to the Earth's surface.
A point charge \(q_{1}=100 . \mathrm{nC}\) is at the origin of an \(x y\) -coordinate system, a point charge \(q_{2}=-80.0 \mathrm{nC}\) is on the \(x\) -axis at \(x=2.00 \mathrm{~m},\) and a point charge \(q_{3}=-60.0 \mathrm{nC}\) is on the \(y\) -axis at \(y=-2.00 \mathrm{~m} .\) Determine the net force (magnitude and direction) on \(q_{1}\).
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