Physics homework related to electric fields

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Worksheet Electric Fields on Multiple Charges
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9) Calculate the electric field strength midway between a 4.5.0 IIC charged object and a -4.5.0 uC charged object if
the two charges are 50 cm apart.
10) Calculate the electric field strength midway between a 3.0 uC charged object and a 6.0 uC object if they are
0.80 m apart.
11) Calculate the electric field strength midway between two 3.0 IIC objects if they are 90 cm apart.
12) Two negatively charge spheres, A and B, are 30 cm apart and have the following charges of 3.0 x 10" C
and 1.5 x 10" C as in the figure below. What is the net electric field at a point P, which is exactly in the
middle between the two charges?
13) What is the magnitude and direction of the electric field at point P in the figure below?
P +6.0x10’6C -2 xloJJ'C
f (9 (3
(—1.0 m—>I<— 2.0 m
Answers:
9. (1.30x1_o° N/C)