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10th Class Science Electricity and Circuits Question Bank Electricity

  • question_answer
    In a Wheatstone bridge shown in figure \[(x=y)\] and A > B. The direction of the current between a and b will be

    A)   From a to b  

    B)  From b to a     

    C)  from a to b through c 

    D)   from b to a through c

    Correct Answer: B

    Solution :

     We know that, in series distribution of voltage takes place in direct proportion to resistance. So, drop across resistance\[X=\]drop across resistance\[Y\]. While drop across resistance\[A\]is greater than drop across resistance. Now, potential at the end of a resistor at which current leaves  \[=\]potential at the end at which current enters the resistor\[-\]drop across the resistor. So, potential at point\[a\]is smaller than at\[b\]. Current flows from higher potential to lower potential.


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