2. Solved Papers
  3. RAJASTHAN PMT

RAJASTHAN PMT Rajasthan - PMT Solved Paper-2010

  • question_answer
    What is the (rms) value of an alternating current which when passed through a resistor produces heat which is thrice that of produced by a direct current of 2 A in the same resistor?

    A)  6 A                                        

    B)  2 A

    C)  3.46 A                  

    D)         0.66 A

    Correct Answer: C

    Solution :

    Heat produced by\[AC=3\,\,\,\times \]Heat produced by\[DC\] \[\therefore \]  \[i_{rms}^{2}Rt=3\times {{i}^{2}}Rt\] \[\Rightarrow \]               \[i_{rms}^{2}=3\times {{2}^{2}}\]                 \[{{i}_{rms}}=2\sqrt{3}=3.46A\]


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