A charge of 16 × × 10 -9 C is fixed at the origin of coordinates. A second charge of unknown magnitude is at x = 3m, y = 0 and a third charge of 12 × × 10 -9 C is at x = 6m, y = 0. What is the value of the unknown charge if the resultant field at x = 8m, y = 0 is 20.25 N/C directed towards positive x-axis?
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(– 25 × 10 -9 C)
Sol.
Electric field, E = 20.25 = k 
∴ 20.25 = 9 × 10 9 
20.25 = 2.25 + 
q 1 + 27
∴ q 1 = – 25 × 10 –9 C
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