Three point charges of +2 uC, -3uC and -3 uC are kept at the vertices A, B and C respectively, of an equilateral triangle of side 20cm. What should be the sign and magnitude of the charge (q) to be placed at the midpoint (M) of side BC so that the charge at A remains in equilibrium?

Question

Khimraj · Answer

sign of q must be positive. magnitude [K*2*10 -6 *3*10 -6 /(0.2) 2 ]*cos30 + [K*2*10 -6 *3*10 -6 /(0.2) 2 ]*cos30 = [K*2*10 -6 *q/0.03] 2*3*10 -6 *cos30/0.04 = q/0.03 q = 18*cos30/4 uC q = 3.9 uC Hope it clears............................

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Three point charges of +2 uC, -3uC and -3 uC are kept at the vertices A, B and C respectively, of an equilateral triangle of side 20cm. What should be the sign and magnitude of the charge (q) to be placed at the midpoint (M) of side BC so that the charge at A remains in equilibrium?

Three point charges of +2 uC, -3uC and -3 uC are kept at the vertices A, B and C respectively, of an equilateral triangle of side 20cm. What should be the sign and magnitude of the charge (q) to be placed at the midpoint (M) of side BC so that the charge at A remains in equilibrium?

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