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Q.

There is an electric field E in X-direction. If the work done on moving a charge 0.2 C through a distance of 2 m along a line making an angle 60∘ with the X-axis is 4.0, what is the value of E

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a

3 N/C

b

4 N/C

c

5 N/C

d

20 NC-1

answer is D.

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Detailed Solution

W=qV=qE⋅d⇒4=0.2×E×2cos⁡60∘=0.2E×(2×0.5)∴E=40.2=20 NC−1
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