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NTSE Sample Paper NTSE SAT Practice Test-8

  • question_answer
    The equivalent resistance between points P and Q in the figure is 1 0 What is the value of unknown resistance R?

    A) \[1\,\Omega \]                         

    B) \[3\,\Omega \]

    C) \[6\,\Omega \]                         

    D) \[9\,\Omega \]

    Correct Answer: B

    Solution :

    [b] Effective resistance in parallel combination is given by, \[{{R}_{p}}=1\Omega \] So, \[\frac{1}{1}=\frac{1}{3}+\frac{1}{R}+\frac{1}{3}\] Or \[\frac{1}{R}=1-\frac{2}{3}=\frac{1}{3}\] \[\therefore \,\,R=3\Omega \]


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