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NEET Sample Paper NEET Sample Test Paper-20

  • question_answer
    In the given figure when galvanomete shows on deflection. Current flowing through 50, resistance will be:

    A)   0.5 A                         

    B)  0.6 A  

    C)                    1.5 A              

    D)       2.0 A

    Correct Answer: B

    Solution :

    Let \[i\] be the current through arm ADC. Then current through arm \[ABC=(2.1-i).\]As there is no deflection in the galvanometer, hence \[(20+5)i=(8+2)\]\[(2.1-i)\] or \[25\,i=21-10\,i\]or \[35\,i=21\] \[i=21/35=3/5=0.6\,A\] Hence, the correction option is (b).


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