2. Solved Papers
  3. JIPMER

JIPMER Jipmer Medical Solved Paper-2000

  • question_answer
      A (100 W, 200V) bulb is connected to a to V power supply.  The  power consumption would be:

    A)  80 W                                    

    B)  125 W                  

    C)         64 W                    

    D)         100 W

    Correct Answer: C

    Solution :

    From the relation \[P=\frac{{{V}^{2}}}{R}\] \[P=100=\frac{{{(200)}^{2}}}{R}\] so,          \[R=\frac{{{(200)}^{2}}}{100}\]                                   ?(i) If it is connected to 169 V then \[{{P}_{1}}=\frac{{{(160)}^{2}}}{R}=\frac{{{(160)}^{2}}}{{{(200)}^{2}}}\times 100\]             [from (i)] \[=\frac{256}{4}=64\,watt\]


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