3. A simple pendulurn of length and bob mass mis Hanging in front of a large nonconducting sheet having surface charge density o. If suddenly a charge + is given to the bob & it is released from the position shown in figure. Find the maximum angle through which the string is deflected from vertical.

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Goork done by fore Gainin Goan ( int_{0}^{theta} fleft(d theta=operatorname{mg} e^{theta+operatorname{crcsig} y}right. ) ( F d theta m=m g d(1-cos theta) ) ( theta_{m}=frac{m g}{F^{j}}left(begin{array}{c}because theta=n a y cos theta=0end{array}right) ) ( theta_{m}=frac{m y}{q E^{-}} ) ( frac{m q}{sigma / 2 G}=frac{260 M y}{sigma} )

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