-
The flux density at a point in space is given by B = 4xax +2kyay + 8az Wb/m2. The value of Qconstant k must be equal to
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- – 2
- – 0.5
- +0.5
- +2
Correct Option: A
B = 4ax̂ + 2ky aŷ + 8aẑ
Divergence of magnetic flux density is zero
That is ∇ . B = 0
| (4x) + | (2ky) + | .8 = 0 | ||||
| ∂x | ∂y | ∂f |
⇒ 4 + 2x + 0 = 0 &rArr k = – 2
∴ Option (a).
