Two fixed charges —2Q and +Q are located at points (-3a, 0) and (+3a, 0) respectively. Then which of the following statement is correct? (a) Points where the electric potential due to the two charges is zero in x-y plane, lie on a circle of radius 4a and centre (5a, 0) (b) Potential is zero at x = a and x =9a (c) Both (a) and (b) are wrong (d) Both (a) and (b) are correct

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Q. Two fixed charges

- 2 Q

and

+ Q

are located at points

(- 3 a, 0)

and

(+ 3 a, 0)

respectively, Then which of the following statement is correct?

Q. Two charges of

- 2 Q

and

Q

are located at points

(a, 0)

and

(4 a, 0)

respectively. What is the electric flux through a sphere of radius

3 a

centred at the origin?

Two fixed charges -2Q and Q are located at the points with coordinates (-3a, 0) and (+3a, 0),respectively, in the xy plane.

a. Show that all points in the xy plane where the electric potential due to the two charges is zero lie on a circle.Find its radius and the location of its center.

b. Give the expression V(x) at a general point on the x-axis and sketch the function V(x) on the whole x-axis.

c. If a particle of charge +q starts from rest at the center of the circle, show by a short quantitative argument that the particle eventually crosses the circle. Find its speed when it does so.

Q. Two charges of magnitudes

- 2 Q

and

+ Q

are located at points

(a, 0)

and

(4 a, 0)

respectively. What is the electric flux due to these charges through a sphere of radius

^{'} 3 a^{'}

with its centre at the origin?

Q. Two charges of magnitudes -2Q and +Q are located at points (a,0) and (4a, 0) respectively. What is the electric flux due to these charges through a sphere of radius '3a' with its center at the origin?

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