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A surface s =10hatj is kept in an elect...

A surface` s =10hatj` is kept in an electric field. `E = 2hati+4hatj+7hatk`. How must electric flux will come out through the surface ?

A

20 unit

B

40 unit

C

30 unit

D

90 unit

Text Solution

Verified by Experts

The correct Answer is:
B
`varphi =vecE*vecS=40`
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