In the question number 5 , work done in bringing a charge of \( 4 \...

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In the question number 5 , work done in bringing a charge of \( 4 \times 10^{-9} \mathrm{C} \) from infinity to that point is
\( \mathrm{P} \)
(a) \( 2.4 \times 10^{-4} \mathrm{~J} \)
(b) \( 1.8 \times 10^{-4} \mathrm{~J} \)
W
(c) \( 3.2 \times 10^{-5} \mathrm{~J} \)
(d) \( 4.1 \times 10^{-5} \mathrm{~J} \)
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