Question

**T****hree point charges +4.0 μC, -5.0 μC,
and -9.0 μC are placed on the x-axis at the points
x = 0 cm, x = 40 cm, and x = 120 cm,
respectively. What is the electric potential at x = 80
cm?**

Answer #1

Three point charges are placed on the x-axis. A charge of +2.0
μC is placed at the origin, -2.0 μC to the right at x = 50 cm, and
+4.0 μC at the 100 cm mark.
a. Find the net electric force (magnitude and direction) that
acts on the charge at the origin.
b. Find the net electric field (magnitude and direction) at x =
25 cm.
c. Find the net electric force (magnitude and direction) on a
charge Q...

A point charge (-5.0 mC) is placed on the x axis at x = 4.0
cm, and a second charge (+5.0 mC) is placed on the x axis at x =
-4.0 cm. What is the magnitude of the electric force on a third
charge (+2.5 mC) placed on the y axis at y = 3.0 cm?

Three electric charges, 2 μC, 5 μC and −2 μC, are placed on the
x-axis at positions −4 m, 0 m and 2 m, respectively. What is the
net force on the 5 μC charge?

Two point charges, Q1 = 3.6 μC and Q2 = -1.8 μC , are placed on
the x axis. Suppose that Q2 is placed at the origin, and Q1 is
placed at the coordinate x1 = − 5.0 cm (Figure 1).
At what point(s) along the x axis is the electric field zero?
Determine the x-coordinate(s) of the point(s).
At what point(s) along the x axis is the potential zero?
Determine the x-coordinate(s) of the point(s).

1. Three point charges, +2.0 μC , -4.0 μC , and +6.0 μC are
placed in that order along a straight line with 18 cm separating
adjacent charges. Calculate the force on each charge.
2. Calculate the electric field strength required to support a
proton (at the Earth’s surface).

1. Three point charges, +2.0 μC , -4.0 μC , and +6.0 μC are
placed in that order along a straight line with 18 cm separating
adjacent charges. Calculate the force on each charge.
2. Calculate the electric field strength required to support a
proton (at the Earth’s surface).

A +7.0-μC point charge is placed at the 0.0 cm mark of an x-axis
and a -5.0-μC charge is placed at the 70 cm mark. What is the net
electric field strength at the 40 cm mark on the x-axis?

Two point charges of +2 μC and -8 μC are located on
the x-axis at x = -1 cm and x = +2 cm
respectively. Where should a third charge of +46 μC be placed on
the +x-axis so that the potential at the origin is equal to
zero? (in units of cm)

Two point charges, Q1 = 3.6 μC and Q2 = -1.6 μC , are placed on
the x axis. Suppose that Q2 is placed at the origin, and Q1 is
placed at the coordinate. x1 = -4.0 cm
At what point(s) along the xx axis is the electric field zero?
Determine the xx-coordinate(s) of the point(s).
At what point(s) along the xx axis is the potential zero?
Determine the xx-coordinate(s) of the point(s).

Two-point charges, Q1 = 3.0 μC and Q2 = -2.0 μC , are placed on
the x-axis. Suppose that Q2 is placed at the origin, and Q1 is
placed at the coordinate x1 = − 5.0 cm.
At what point(s) along the xx axis is the electric field zero?
Determine the xx-coordinate(s) of the point(s).
At what point(s) along the xx axis is the potential zero?
Determine the xx-coordinate(s) of the point(s).

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