A cylinder of radius R and length L is placed in a uniform electric field E parallel to the cylinder axis. The totalflux from the curved surface of the cylinder is given by
A
2πR2E
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B
πR2E
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C
(πR2−πR)E
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D
zero
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Solution
The correct option is Dzero Φ=Φ1+Φ2+Φ3Φ1=EAcos180=−EA =−EA+EA+0Φ2=EAcos0=+EA =0Φ3=EAcos90=0(Since Angle between E and A(Lateral surface) is always 90)