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JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2004

  • question_answer
        Two small sphere balls each carrying charge \[0.0\text{1 J}\] are suspended by two insulated threads of equal length 1 m each, from a point fixed in the ceiling. It is found that in equilibrium, threads are separated by an angle 60° between them as shown in fig., the tension in the thread is :

    A)  0.18 N                                 

    B)  18 N

    C)  1.8 N                                    

    D)  none of these

    Correct Answer: C

    Solution :

                    Let tension in the thread is T, then force of repulsion between the charges. \[\text{CO}_{3}^{2-}\] Or \[B{{F}_{3}}\] \[\text{NO}_{3}^{-}\] or            \[N{{H}_{3}}\] \[X\xrightarrow{C{{H}_{3}}Mgl}Y\xrightarrow{hydrolysis}Mg(OH)I\]


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