The Figure below shows a pair of charged particles held fixed in location on the x-axis, and a point "P", which is located on the y-axis, at y = 8.00 cm. Q = + 2.00 µuC, Q, = - 2.00 uC. A+y +P 8.00 cm >+x Q1 Q2 Q1= + 2.00 µC 6.00 cm 6.00 cm Q2= - 2.00 µC 1. The force which O exerts on O, is directed A. in the positive x direction. B. in the negative x direction. C. in the positive y direction. D. in the negative y direction. E. straight towards the point "P". 2. The force which O exerts on O, has a magnitude of A. 2.50 x 10 N. B. 0.999 mN. C. 9.99 N. D. 0.300 N. E. 2.50 N. 3. Which of the following figures correctly shows the electric field ( E) created by Q at the point P and the electric field (E2) created by at the point P ? (HINT: Double check the labeling of the electric field vectors - which is the field due to Q1 and which is the field due to Q2!) A) B) E2 A+y KP (P E1 8.00 cm 8.00 cm >+x Q1 Q1 Q2 Q2 + 2.00 μC 2.00 με + 2.00 µC 6.00 cm 6.00 cm - 2.00 µC 6.00 cm 6.00 cm C) A E1 D) A+y P E2 E1 E2 8.00 cm 8.00 cm Q1 Q2 2.00 µC Q1 Q2 - 2.00 µC + 2.00 µC + 2.00 µC 6.00 cm 6.00 cm 6.00 cm 6.00 cm E) E1 *y E2 8.00 cm Q1 Q2 + 2.00 µC > - 2.00 µC 6.00 cm 6.00 cm

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.