Electrostatics Question 357

Question: There is an electric field $ E $ in X-direction. If the work done on moving a charge $ 0.2C $ through a distance of $ 2m $ along a line making an angle $ 60{}^\circ $ with the X-axis is 4.0, what is the value of $ E $ [CBSE PMT 1995]

Options:

A) $ \sqrt{3}N/C $

B) $ 4N/C $

C) $ 5N/C $

D) None of these

Show Answer

Answer:

Correct Answer: D

Solution:

$ W=qV=qE.d $

therefore 4 = 0.2x Ex (2 cos 60o) = 0.2 Ex (2x 0.5) $ E=\frac{4}{0.2}=20N{{C}^{-1}} $



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