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A small bob of mass 100 mg and charge + 10 μ C is connected to an insulating string of length 1 m. It is brought near to an infinitely long non-conducting sheet of charge density ‘ σ ’ as shown in figure. If string subtends and angle of 45° with the sheet at equilibrium the charge density of sheet will be. {Given ε 0 = 8.85 × 10 –12 m F and acceleration due to gravity, g = 10 2 s m } CAREER POINT CAREER POINT Ltd., CP Tower, IPIA, Road No.1, Kota (Raj.), Ph: 081-47250011 www.careerpoint.ac.in 11 JEE Main Online Paper

1. 17.7 nC/m 2
2. 885 nC/m 2
3. 0.885 nC/m 2
4. 1.77 nC/m 2

Correct answer: 1.77 nC/m 2

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