Two point charges qa 3uc and qb 3uc
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Question 1.8: Two point charges qA = 3 μC and qB = −3 μC are located 20 cm apart in vacuum. (a) What is the electric field at the midpoint O of the line AB joining the two charges? (b) If a negative test charge of magnitude 1.5 × 10 −9 C is placed at this point, what is the force experienced by the test charge?
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