Haryana PMT Haryana PMT Solved Paper-2011

  • question_answer An ammeter, whose resistance is \[50\Omega \] can read upto 10 mA. In order to increases its range to 1            A. What should be the shunt resistance?

    A)                  0.5050\[\Omega \]                        

    B)  5.050\[\Omega \]

    C)                  50.50 \[\Omega \]                         

    D)  505.05\[\Omega \]

    Correct Answer: A

    Solution :

                    To increase the range of ammeter a suitable resistance (shunt) should be connected in parallel.                 Let resistance of shunt wire = S                 \[S=\frac{{{i}_{g}}\times G}{i-{{i}_{g}}}\]                 \[S=\frac{10\times {{10}^{-3}}\times 50}{1-(10\times {{10}^{-3}})}\]                 \[=0.5050\Omega \]


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