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There is an electric field E in x-direct...

There is an electric field E in x-direction. If the work done on moving a charge of `0.2C` through a distance of 2w m along a line making a angle `60^@` with x-axis is 4 J, then what is the value of E?

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The correct Answer is:
B
As `W= F ds cos theta=dE ds cos theta, 4=0.2 E times 2 cos 60^@, E=20 N//C`.
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