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 $E$

• A. $\sqrt{3}N/C$
• B. $4N/C$
• C. $5N/C$
• D. None of these

Answer 1

Answer: (D)

None of these

Answer 2

$W = qV = qE.d$

⇒ 4 = 0.2 × E × (2 cos 60^o)

= 0.2 E × (2 × 0.5)

∴ $E = \frac{4}{0.2} = 20NC^{- 1}$