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}} $
