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JCECE Engineering JCECE Engineering Solved Paper-2002

  • question_answer
    In a moving coil galvanometer, deflection \[\phi \] and current \[I\] flowing through it are related by:

    A) \[I\propto \tan \phi \]                  

    B) \[I\propto \phi \]

    C)  \[I\propto {{\phi }^{2}}\]                            

    D)  \[I\propto 1/\phi \]

    Correct Answer: B

    Solution :

    Current flowing in moving coil galvanometer is given by \[I=\frac{C}{BAN}\phi \]where \[C\] is deflecting couple, \[B\] is magnetic field, \[A\] is area of the coil, \[N\] is number of turns and \[\phi \] is the angle through which coil. rotates. Hence,                  \[I\propto \phi \]


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