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?
In the direction of E
In opposite direction of E
In the angle of 45° with E
In the angle of 60° with E
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.

Discussion:
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