Question Detail
Question
Determine the value of two equal charges if they repel each other with a force of 0.1 N when placed 50 cm apart in a vacuum.
Correct Answer
Option A is the correct answer.
Detailed Explanation
Same working as Q8: q = sqrt(F r2/k) = sqrt[(0.1)(0.5)2/9x109] = 1.7x10-6 C. Since the charges REPEL, they are like charges (both positive, taken as +1.7x10-6 C).
Hint
Same working as Q8: q = sqrt(F r2/k) = sqrt[(0.1)(0.5)2/9x109] = 1.7x10-6 C.