Use the worked example above to help you solve this problem. Charge q1 = 7.40 mu

Question

Use the worked example above to help you solve this problem. Charge q1 = 7.40 muC is at the origin, and charge q2 = -4.90 µC is on the x-axis, 0.300 m from the origin (see figure). Place a charge of -8.30 muC at point P and find the magnitud and direction of the electric field at the location of q2 due to q1 = 7.40 muC and the charge at P. Magnitude=___________ N/C Direction=______________ degree Find the magnitude and direction of the force on q2. Magnitude=___________ N Direction=____________ degree

Explanation / Answer

c) Enet = K x 7.40 x 10-6 / 0.3^2 i   + (K8.30 x 10-6 / 0.5^2)(-0.3/0.5 i + 0.4/0.5j)

           = 560720 i + 239040j N/C

magnitude = 609546 N/C

direction = tan-1(j/i) = 23.09 degrees above +x -axis

b) F = qE = 4.90 x 10-6 x 609546 = 3 N

direction 23.09 degrees below -ve x-axis (opposite of electric field direction)

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