Question

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if E= 6 i^ +3j^ + 4k^ , calculate the electric flux through a surface of area 20 units in Y-Z plane​

Answer 1

Electric Flux = E.A

Here, E = 6i^ +3j^ + 4k^

A = 20i^

So, Electric flux = 6(20)+ 3(0) + 4(0)

= 120 Vm

Answer 2

E

=10

i

^

+3

j

^

+4

k

^

Since, we have surface area of unit 10 lying in Y

2

plane.\perp^rto[laneY_z$$]

Hence, the area vector $$

S

=10

i

^

We know that

flux (ϕ) is given as

ϕ=∫

E

⋅

ds

ϕ=

E

⋅

S

=(10

i

^

+3

j

^

+4

k

^

)⋅(10

i

^

)

ϕ=100Nm²C^-1