Question

if q1 is at (2,2)cm and Q2 is at (-5,-5)cm and they have equal charges - where is point P such that E=0?

Answer #1

Let P(X,Y) is the point where electric field is zero

Electric field due to q1 at P is given by

Similarlly

Since q1 and Q2 are same then

it will be the line where the electric field zero.

Two charges, q1 = 5 μC and q2 = 7 μC, are separated by 25 cm.
Where should a third charge be placed on the line between them such
that the resultant force on it will be zero? Does it matter if the
third charge is positive or negative?

Two charges q1 (=+3 nC) and q2 (=+5 nC) are located at (0,2 cm)
and (0, -2 cm) respectively.
What are the strength and direction of the electric field at the
position (5cm, 0). Specify the direction as an angle above or below
horizontal (X-axis).

Two equal positive charges q1 = q2 = 2.0µC
are located at x=0, y= 0.30m and x= 0, y= -0.30m. What are the
magnitude and direction of the net electric force that these
charges exert on a third point charge q3 = 4.0µC at
x=0.40m, y=0.

Two point charges, Q1 = -30 ?C and Q2
= 56 ?C , are separated by a distance of 12 cm. The
electric field at the point P (see the figure(Figure 1)) is zero.
How far from Q1 is P?

Two point charges are fixed 4.0 cm apart from each other. Their
charges are Q1=Q2 = 7.5 μC , and their masses are m1 = 1.5 mg and
m2 = 2.5 mg .If both charges are released from rest at the same
time, what will be the speed of Q1 after a very long time?

How Can I solve this problem?
Three charges, q1= -10 μC, q2= 4 μC and q3= 10 μC are aligned
vertically, 6 cm apart. Point P is located 8 cm directly to the
right of q2.
a) Find the electric field contribution from q1 on point P.
b) Find the electric field contribution from q2 on point P.
c) Find the electric field contribution from q3 at point P.
d) Find the magnitude of the net electric field at point...

In a vacuum, two particles have charges of q1 and q2, where q1 =
+5.1C. They are separated by a distance of 0.24 m, and particle 1
experiences an attractive force of 2.8 N. What is the value of q2,
with its sign?

Two point charges,
q1=q1= 4.0×10-6 C and
q2=q2= -1.0×10-6 C,
are located on the x axis at x1 = -1.0 cm and
x2 = 3.0 cm.
(a) Determine the electric field at the origin.
b) Determine the x coordinate of a point on the positive x axis
where the electric field is zero; i.e., a test charge placed at
this point would experience no force.
(a) Determine the electric field at the origin.

Two charges, Q1 and Q2, are separated by
6·cm. The repulsive force between them is 25·N. In each case below,
find the force between them if the original
situation is changed as described.
(a) The magnitude of charge Q1 is reduced to
Q1/5. N
(b) The distance between the charges is reduced to
2·cm. N
(c) The magnitude of charge Q2 is increased to
5Q2 and the distance is increased to
30·cm. N

Four charges q1, q2, q3 and
q4, are placed at the corners of a square. Charges
q1 and q4 are located on opposite corners and
have equal charges. Both q2 and q3 have a
charge of 1.0 C. If the force on q2 is zero, what is the
charge on q1?
A. -1.0 C
B. -0.35 C
C. -0.71 C
D. -0.20 C

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