A charge of 8 mC is located at the origin. Calculate the work done in taking a small charge of $-2\times {10}^{-9}$ from a point P(0,0,3cm) to a point Q (0,4cm,0) via a point R(0,6cm,9cm).

A charge of 8 mC is located at the origin. Calculate the work done in taking a small charge of $-2\times {10}^{-9}C$ from a point P (0,0,3 cm) to a point Q (0,4 cm, 0) via a point R (0,6 cm, 9cm).

A charge of 8 mC is located at the origin. Calculate the work done in taking a small charge of $-2\times {10}^{-9}C$ from a point P(0,0,3 cm) to a point Q10,4 cm, 0) via a point R(0,6 cm, 9 cm).

Calculate the work done in taking a charge $-2\times {10}^{-9}$C from A to B via C (in diagram )

As per this diagram a point charge $+q$ is placed at the origin $O$. Work done in taking another point charge $-Q$ from the point $A(0,a)$ to another point $B(a,0)$ along the staight path $AB$ is:

(a) Calculate the potential at a point P due to a charge of $4\times {10}^{-7}C$ located 9 cm away.
(b) Hence obtain the work done in bringing a charge of $2\times {10}^{-9}C$ from infinity to the point P. Does the answer depend on the path along which the charge is brought ?

As per this diagram a point charge $+q$ is placed at the origin $O$. Work done in taking another point charge $-Q$ from the point $A(0,a)$ to another point $B(a,0)$ along the staight path $AB$ is:

A charge of 0.5 nC is placed at the centre of an equilateral triangle of side 10 cm, calculate the work done in bringing a charge of 0.1 nC from infinity to any vertices of the triangle.

Two charges $-q\text{and}+q$ are located at points $A(0,0,-a)\text{and}B(0,0+a)$. How much work is done in moving a test charge from point $(b,0,0)$ to $Q(-b,0,0)$ ?

(i) Can two equpotential surfaces intersect each other ? Give reason.
(ii) Two charges $+q\text{and}-q$ are located at points A $(0,0,-2)\text{and}B(0,0,2)$ respectively. How much work will be done in moving a test charge from point P$(4,0,0)\text{to}(-5,0,0)$ ?

Two charges - q and + q are located at points A(0, 0, -a) and B(0, 0, +a) respectively. How much work is done in moving a test charge from point P(7,0,0) to Q(-3,0,0) ?