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 4 J, then what is the value of E? (a) 5 N/C (b) 20 N/C (c) √(3) N/C (d) 4 N/C

Answer: (b). W = qEdcos θ 4 = 0.2 × E × 2 × cos 60° = 0.2E E = 20 N/C. So the answer is (b).

There is an electric field E in x -direction. If the work done on… | NEET 1995 (AIPMT)

Q66NEET 1995 · AIPMTEasy

Electrostatic Potential Energy

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

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Answer: (b)

$W = qEd\cos\theta$
$4 = 0.2 \times E \times 2 \times \cos 60^\circ = 0.2E$
$E = 20$ N/C. So the answer is (b).

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Electrostatic Potential Energy question from NEET 1995 (AIPMT)

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