Chapter 21, Concept Question 03
The figure shows four situations in which charged particles are fixed in place on an axis. In which situations is there a point to the left of the particles where an electron will be in equilibrium?
(a)
(b)
(c)
(d)
Chapter 21, Problem 003
What must be the distance in meters between point charge q1 = 26.8 µC and point charge q2 = 64.4 µC for the electrostatic force between them to have a magnitude of 6.14 N?
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Chapter 21, Problem 013
In the figure particle 1 of charge q1 = 0.96 µC and particle 2 of charge q2 = -3.00 µC, are held at separation L = 9.8 cm on an x axis. If particle 3 of unknown charge q3 is to be located such that the net electrostatic force on it from particles 1 and 2 is zero, what must be the (a)x and (b)y coordinates of particle 3?
(a) Number
(b) Number
Chapter 21, Problem 017
In Figure (a) particles 1 and 2 have charge 35.0 µC each and are held at separation distance d =
2.70 m. (a) What is the magnitude of the electrostatic force on particle 1 due to particle 2? In Figure (b), particle 3 of charge 35.0 µC is positioned so as to complete an equilateral triangle. (b) What is the magnitude of the net electrostatic force on particle 1 due to particles 2 and 3?
(a)
Numbe

Chapter 21, Problem 028
Flying Circus of Physics
A current of 0.300 A through your chest can send your heart into fibrillation, ruining the normal rhythm of heart beat and disrupting the flow of blood (and thus oxygen) to your brain. If that current persists for 1.25 min, how many conduction electrons pass through your heart?
Number
Units
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the tolerance is +/-2%
Chapter 21, Problem 046
In the figure four particles are fixed along an x axis, separated by distances d = 4.60 cm. The charges are q1 = +4e, q2 = -e, q3 = +e, and q4 = +12e, with e = 1.60 × 10-19 C. What is the value of the net electrostatic force on (a) particle 1 and (b) particle 2 due to the other particles?
Chapter 22, Concept Question 09
The figure shows two disks and a flat ring, each with the same uniform charge Q.
Rank the objects according to the magnitude of the electric field they create at points P (which are at the same vertical heights), greatest first. If multiple objects rank equally, use the same rank for each, then exclude the intermediate ranking (i.e. if objects A, B, and C must be ranked, and A and B must both be ranked first, the ranking would be A:1, B:1, C:3). If all objects rank equally, rank each as '1'.
1. Greatest
2. Second greatest
3. Third greatest
Chapter 22, Problem 007
In the figure the four particles form a square of edge length a = 6.00 cm and have charges q1 = 8.04 nC, q2 = -21.9 nC, q3 = 21.9 nC, and q4 = -8.04 nC. What is the magnitude of the net electric field produced by the particles at the square's center?
the tolerance is +/-2%
Chapter 22, Problem 030
The figure shows two concentric rings, of radii R and R' = 2.78R, that lie on the same plane. Point P lies on the central z axis, at distance D = 4.01R from the center of the rings. The smaller ring has uniformly distributed charge Q = 4.90 × 10-6 C. What is the uniformly distributed charge on
the tolerance is +/-2%
Chapter 22, Problem 044
An ion has a mass of 8.24 × 10-25 kg and a charge of +3e. What is the magnitude of the electric field that will balance the gravitational force on the particle?
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Chapter 22, Problem 071
A charge of 20 nC is uniformly distributed along a straight rod of length 18 m that is bent into a circular arc with a radius of 5.5 m. What is the magnitude of the electric field at the center of curvature of the arc?
-0.4748
Number Units
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