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Four point charges –q, +q, +q and –q are placed on y-axis at y = –2d, y = –d, y = +d, y = +2d, respectively. The magnitude of the electric field E at a point a the x-axis at x = D, with D>>d, will behave as :

1. D 1 E ∝
2. 3 D 1 E ∝
3. 4 D 1 E ∝
4. 2 D 1 E ∝ CAREER POINT CAREER POINT , CP Tower, IPIA, Road No.1, Kota (Raj.), : 0744-6630500 | www.ecareerpoint.com Email: info@cpil.in Page # 10 JEE Main Online

Correct answer: 4 D 1 E ∝

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