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KVPY Sample Paper KVPY Stream-SX Model Paper-3

  • question_answer
    What should be value of E for which galvanometer shows no deflection:

    A) 10 V                

    B) 5 V

    C) 15 V                            

    D) 20 V

    Correct Answer: A

    Solution :

    \[\frac{E-10}{20}=I\]
    \[10=E-\frac{E-10}{20}\times 5\]
    \[40=4E-E+10\]
    \[30=3E\]
    \[E=10\,V.\]


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