s Sample papers for JEE Main & Advanced JEE Main Sample Paper-41 - Studyadda.com
  2. Sample Papers
  3. JEE Main & Advanced

JEE Main & Advanced Sample Paper JEE Main Sample Paper-41

  • question_answer
    An alternating current having peak value 14 A is used to heat a metal wire; To produce the same heating effect, a constant current i can be used, where i is

    A)  14 A                           

    B)  about 20 A

    C)  7 A                             

    D)  about 10 A

    Correct Answer: D

    Solution :

    \[{{I}_{DC}}={{I}_{rms}}=\frac{{{I}_{peak}}}{\sqrt{2}}\]               \[=\frac{14}{\sqrt{2}}\]\[=9.9A\]


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