(a) Calculate the potential at a point P due to a charge of `4xx10^(-7) C` located 9 cm away. (b) Hence obtain the work done in bringing a charge of `2xx10^(-9) C` from infinity to the point P. Does the answer depend on the path along which the charge is brought ?

(a) Calculate the potential at a point P due to a charge of `4xx10^(-7

1.	(a) Calculate the potential at a point P due to a charge of `4xx10^(-7) C` located 9 cm away. (b) Hence obtain the work done in bringing a charge of `2xx10^(-9) C` from infinity to the point P. Does the answer depend on the path along which the charge is brought ?
Answer» (a) Here, `q = 4xx10^(-7) C`, `r = 9 cm = 9xx10^(-2)m , V = ?` `V = (q)/(4pi in_(0) r) = 9xx10^(9) ((4xx10^(-7)))/(9xx10^(-2))` `= 4xx10^(4)` volt (b) `W = q xx v = (2xx10^(-9))xx4xx10^(4)` `= 8xx10^(-5) J` The answer does not depend upon the path along which the charge is brought because electrostatic forces are conservative forces.

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(a) Calculate the potential at a point P due to a charge of `4xx10^(-7) C` located 9 cm away. (b) Hence obtain the work done in bringing a charge of `2xx10^(-9) C` from infinity to the point P. Does the answer depend on the path along which the charge is brought ?

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