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NEET Sample Paper NEET Sample Test Paper-81

  • question_answer
    The magnetic flux through a circuit of resistance R changes by an amount \[\Delta \phi \] in a time\[\Delta t\]. Then, the total quantity of electric charge Q that passes at any point in the circuit during the time \[\Delta t\] is represented by

    A)  \[Q=\frac{\Delta \phi }{R}\]                  

    B)  \[Q=\frac{1}{R}\,\frac{\Delta \phi }{\Delta t}\]

    C)  \[Q=R\,\frac{\Delta \phi }{\Delta t}\]                  

    D)  \[Q\,\,=\,\,\frac{\Delta \phi }{\Delta t}\]

    Correct Answer: A

    Solution :

    Induced emf is given by \[{{E}_{ind}}\,\,=\,\,\frac{\Delta \phi }{\Delta t}\] \[Current\,\,i=\frac{Q}{\Delta t}=\frac{\Delta \phi }{\Delta t}\times \frac{1}{R}\,\,\Rightarrow \,\,Q=\frac{\Delta \phi }{R}\]


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