2. Solved Papers
  3. AMU Medical

AMU Medical AMU Solved Paper-2003

  • question_answer
    n identical resistors each of resistance r when connected in parallel, have a total resistance R. When these resistors are connected in series, then effective resistance in terms ofR is

    A)  \[\frac{R}{{{n}^{2}}}\]                                  

    B)  \[{{n}^{2}}R\]

    C)  \[n\,R\]                                              

    D)  \[\frac{R}{n\,}\]

    Correct Answer: B

    Solution :

                     In domestic circuit, bulbs are connected in parallel, therefore the potential difference across each bulb is same. From Joules law \[R=\frac{{{V}^{2}}}{P}\] From above dilation we conclude that bulb having higher power will have less a resistance and vice-versa. Hence, resistance of 40 W bulb is more.


You need to login to perform this action.
You will be redirected in 3 sec spinner