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12th Physics 2018 Set1 Delhi Board Paper Solution

Question 11

(a) Three point charges q, -4q and 2q  are placed at  the vertices of an equilateral triangle ABC of side 'l' as shown in the figure. Obtain the expression for  the magnitude of the resultant electric force acting on the charge q.

(b) Find out the amount of the work done to separate the charges at infinite distance.

Answer

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