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10th Class Science Electricity and Circuits Question Bank Electricity

  • question_answer
    How will the reading in the ammeter of figure be affected if another identical bulb \[Q\] is connected in parallel to \[P\] as shown. If the voltage in the mains is maintained at a constant value,

    A)  the reading will be reduced to one half

    B)  the reading will not be affected

    C)  the reading will be doubled of the previous value  

    D)  the reading will be increased four fold

    Correct Answer: C

    Solution :

     When identical resistance is put in parallel,\[{{R}_{eq}}\] becomes half. So, the current supplied becomes twice. Though the current in the branch \[Q\] will be unaffected, the reading of the ammeter in the common branch will double.


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