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There is an electric field E in x-direction. If the work done on moving a charge of 0.2 C through a distance of 2 m along a line making an angle 60° with x-axis is 4J, then what is the value of E?
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- 3 N/C
- 4 N/C
- 5 N/C
- 20 N/C
Correct Option: D
Charge (q) = 0.2 C ; Distance (d) = 2m ;
Angle θ = 60° and work done (W) = 4J.
Work done in moving the charge (W) = F.d cos θ = qEd cos θ
| or , E = | = | = | = 20 N / C | |||
| qd cos θ | 0.2 × 2 × cos 60° | 0.4 × 0.5 |
