إختبار
SHORT TEST
متطلبات الإكمال
Consider three charges q1, q2,
q3 each equal to q at the vertices of an equilateral triangle of
side l.
Consider three charges q1, q2,
q3 each equal to q at the vertices of an equilateral triangle of
side l.
What is the force on a charge Q (with the same sign as q) placed
at the centroid of the triangle
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