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Two very large parallel disks of charge ...

Two very large parallel disks of charge have their centers on the x-axis and their planes perpendicular to the x-axis. The disk that intersects x = -R has uniform positive surface charge density `+sigma`, the disk that intersects `x = +R` has uniform negative surface charge density `-sigma`. `(i) , (ii)
(iii) , (iv) .
Which graph best represents the plot of the electric potential (V) as a function of x (treating V = 0 at x = 0)?

A

(i)

B

(ii)

C

(iii)

D

(iv)

Text Solution

Verified by Experts

The correct Answer is:
B

In the region between the disks electric field is uniform and in the region outside the disks electric filed is zero. In the region between the plates, potential remains same, hence force due to charge on plates does not change.
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