Question

A point charge of 5.00 μC is placed at the origin and a second point charge of -3.00 μC is placed at x = 0.450 m. Where along the x-axis can a third charge be placed so that the net force on it is zero?

**What if both charges are positive?**

Please answer the bolded part of the question as well!

Answer #1

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a point charge of 5 micro coulombs is placed at the origin and a
second point charge of -3 micro coulombs is placed at x=0.370m.
where along the x axis can a third charge be placed so that the net
force on it is zero?
for this part I got 1.64m which was marked corrected
but the second part asks, what if both charges are positive?

A point charge +6.8 μC is placed at the origin, and a second
charge –3.6 μC is placed in the x-y plane at (0.40 m , 0.50 m ).
Where should a third charge be placed in the plane so that the net
force acting on it is zero? Express your answers using two
significant figures. Enter the x and y coordinates of the charge
separated by a comma.

A point charge of –3.00 μC is located at the origin; a point
charge of 4.00 μC is located on the x axis at x = 0.200 m; a third
point charge Q is located on the x axis at x = 0.320 m. The
electric force on the 4.00 μC charge is 240 N in the +x direction.
(a) Determine the charge Q. (b) With this configuration of three
charges, at what location(s) is the electric field zero? (-97.2...

A point charge q1 = 4.05 nC is placed at the origin,
and a second point charge q2 = -3.05 nC is placed on the
x-axis at x=+ 21.0 cm . A third point charge
q3= 1.90 nC is to be placed on the x-axis between
q1and q2. (Take as zero the potential energy of
the three charges when they are infinitely far apart.)
PART A - What is the potential energy of the system of the three
charges if...

A point charge q1 = 4.10 nC is placed at the origin, and a
second point charge q2 = -3.10 nC is placed on the x-axis at x=+
21.0 cm . A third point charge q3 = 1.90 nC is to be placed on the
x-axis between q1 and q2. (Take as zero the potential energy of the
three charges when they are infinitely far apart.)
Part A
What is the potential energy of the system of the three charges...

A point charge of 4.4 icro coulumbs is placed at the origin
(x1=0) of a coordinate system, and another charge of -1.9 micro
coulumbs is placed on the x axis at x2=.28m.
a)where on the x axis can a third charge be lpaced in meters so
that the net force is zero?
b)what if bot charges are positive, that is what if the second
charge is 1.9 micro coulums?

Point charges of 5.00 µC and –3.00 µC are placed 0.250
m apart.
(a) Where can a third charge be placed so that the net force on it
is zero?
(b) What if both charges are positive?

A point charge 4.40 μC is held fixed at the origin. A
second point charge 1.20 μC with mass of
2.80×10−4 kg is placed on the x axis, 0.240
mfrom the origin.
a)What is the electric potential energy U of the pair
of charges? (Take U to be zero when the charges have
infinite separation.)
b)The second point charge is released from rest. What is its
speed when its distance from the origin is 0.600 m .
c)What is its...

4. A point charge 7.00 uC is placed at the origin and -5.00 uC
charge (x=0.3m) along x-axis. You are asked to determine the
following.
(a) Electric field due to 7.00 uC on y-axis at the point
(2,-4,0)
(b) Electric field due to -5.00 uC at the same point.
(c) Net electric field and it’s direction due to total charges
at the same point.
4. A point charge 7.00 uC is placed at the origin and -5.00 uC
charge due...

A charge of 2mC is placed at the origin. A second charge of 7mC
is placed along the x-axis at x=4cm. Where along the x-axis, other
than infinitely far away, is the net electric field due to the two
charges equal to zero? Show your setup to solve the problem
clearly. You may use a graphing calculator or online utility to
compute the numerical answer.

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