Electronics and Communication Engineering - Exam Questions Papers - Discussion
Discussion Forum : Exam Questions Papers - Exam Paper 11 (Q.No. 37)
37.
Consider an incremental vector element of length ΔL and angle between an electric field E and ΔL s cos θ.
Then in which direction should ΔL be placed to be obtain maximum value of Δv?

Answer: Option
Explanation:
Now E is a definite value at the point which it is present and is independent of direction of ΔL.
The magnitude of ΔL is constant and direction is along the unit vector.
∴ Maximum value of Δv will occur at cos θ = - 1 or ΔL points in opposite direction to E.
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