2. Solved Papers
  3. Manipal Engineering

Manipal Engineering Manipal Engineering Solved Paper-2014

  • question_answer
    The amount of work done in increasing the voltage across the plates of a capacitor from 5V to 10V is W. The work done in increasing it from 10 V to 5 V will be

    A) 0.6 W                    

    B) 1W

    C) 1.25W                  

    D) 1.67W

    Correct Answer: D

    Solution :

    As we know that work done \[\frac{2\sqrt{2}{{\mu }_{0}}i}{\pi a}\] When potential difference increases from 5V to 10 V then \[\frac{{{\mu }_{0}}i}{\sqrt{2}\pi a}\]                                ...(i) When potential difference increases form 10  to 15V, then\[{{R}_{1}}=1\Omega \]           ...(ii) On solving Eqs. (i) and (ii) we get W' = 1.67 W


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