Three charges are arranged along a straight line as follows: q1 --- q2 --- q3. The distance between charges q1 and q2 is 25.0cm, and that between q2 and q3 is d cm. The charges are as follows: q1= +14.7uC, q2=-6.73uC, q3=+4.1uC. What is d (in cm), so that q3 (note that this time this is not q2!) experience no net electrostatic force?

Below is a diagram showing the relative positions of 3 charges. Determine the force on the - 5 µC charge due to the other 2 charges. [ remember you need magnitude & direction] Q1 10 cm Q2 ·+ 2 µC | | 5.0 cm +8 μC . -5 μC Q3

Three charges are arranged along a straight line as follows: q1 --- q2 --- q3. The distance between charges q1 and q2 is 13.81cm, and that between q2 and q3 is 25.08cm. The charges are as follows: q1= +4.90uC, q2=+5.07uC, q3=+6.69uC.What is the net force (N) acting on charge q2? Consider the left direction to be negative.

Three point charges are shown as below. Find the net force experienced by q2 due to q1 and q3. 200 μC 100 µC -100 μC (+) +) 1m 1m q1 q2 93

When point charges q1 = +8.7 μC and q2 = +6.8 μC are brought near each other, each experiences a repulsive force of magnitude 0.57 N. Determine the distance between the charges. Number i eTextbook and Media Units +

The diagram below shows two point charges, A & B. The charge of A is 1.9 nC & the charge of B is -7.1 nC. Determine the magnitude & direction of the net E-field at point P. The distance between A & P is 0.31 m & the distance between B & P is 0.41 m. P WebAssign Plot P ●? 14 cm- Part B: Location of zero E-field Two point charges, A & B (qA = -20 μC & qB = 50 μC), are separated by 14 cm. The electric field at point P (see below) is zero. How far from A is P? A Enet = direction of Enet = B o relative to the HORIZONTAL in quadrant 3

Three charges are located on an x-y axis.  q1 has a value of 2.0 mC and is at (0, 3m).  q2 has a value of 3.0 mC  and is located at the origin.  q3 has a value of 4.0 mC and is located at (4 m, 0).  Find the magnitude and direction of the force on q1.  Don't forget to convert mC to C.   Draw a clear diagram!

A glass rod with a charge of  + 15.6 nC is held  2.50 cm from a piece of wool that is oppositely charged.  If the attractive force between the glass rod and wool is  - 3.50 X 10 -3 N,  what is the charge, in nanoCoulombs, on the piece of wool ?    (Ans:  - 15.6 nC)

Three identical metal spheres designated P, Q and R are charged as shown below. The distance PQ is the same as QR. The magnitude of the electric force acting on the following sphere is smallest: R + 4 nC -2 nC -I nC a. Q b. P С. P and Q d. The force on each sphere is the same e. R

At the corners of an equilateral triangle there are three point charges. q1 = 2.9 µC, q2 = -4.5 µC, q3= 7.9 µC as seen in the figure. Calculate the total electric force on the charge. . The distance between charges is d = 0.66m. Remember .Ke = 8.99 x 10^9