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Two identical balls having a mass m and small radii and having equal charge q are suspendended from common point by two insulating strings of equal length l . In equilibrium each string makes an angle $\;\theta\;$ with the vertical . If $\;\theta=45^{0}\;find\;l^2$ in terms of q and m


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Answer : (a) $\;\large\frac{k\;q^2}{2\;mg}$
Explanation :
From (1) and (2)
answered Feb 4, 2014 by yamini.v

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