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A surface S=10hatj is kept in an electri...

A surface `S=10hatj` is kept in an electric field of `vecE=3hati+5hatj+6hatk`. How much electric flux will come out through the surface?

A

30 units

B

40 units

C

50 units

D

60 units

Text Solution

Verified by Experts

The correct Answer is:
C
`phi=vecE*dvecs=(3hati+5hatj+6hatk)*10hatj`
=50 units
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Knowledge Check

  • The electric flux through the surface

    A
    in fig. (iv) is the largest
    B
    in fig. (iii) is the least
    C
    in fig. (ii) is same as fig.(iii) but is smaller than fig.(iv)
    D
    Is the same for all the figures.

  • The electric flux through the surface

    A
    in fig, (iv) is the largest
    B
    in fig, (iii) is the least
    C
    in fig (ii) is same as a fig (iii) but is smaller than that in Fig (iv).
    D
    is the same for all the figures.

  • The electric flux coming out of the equi-potential surface is -

    A
    perpendicular to the surface
    B
    parallel to the surface
    C
    in all directions
    D
    zero

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