Find the electric potential of a point if 2j of work is done in bringing a charge of 0.2 coulomb from infinity to that point

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Solution

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$W o r k d o n e = q (V_{2} - V_{1}) V_{1} : i s t h e p o t e n t i a l o f t h e p o i n t w h e r e t h e c h a r g e i n i t i a l l y l i e s V_{2} : P o t e n t i a l o f t h e p o i n t w h e r e c h a r g e f i n a l l y l i e s . V_{1} = 0 a s p o t e n t i a l a t i n f i n i t y i s t a k e n a s z e r o W o r k d o n e = q (V_{2}) 0.2 = 2 \times V_{2} V_{2} = \frac{2}{0.2} = 10 v o l t R e g a r d s$

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