# A cylinder of radius R and L is placed in the uniform electric field E parallel to the cylinder axis. The total flux …..

Q: A cylinder of radius R and L is placed in the uniform electric field E parallel to the cylinder axis. The total flux from the two flat surfaces of the cylinder is given by
(a) 2πR2E
(b) πR2/E
(c) (πR2-πR)/E
(d) zero

Ans: (D)
Sol:
$\phi = - E. \pi R^2 + E.\pi R^2$

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