2. Solved Papers
  3. CMC Medical

CMC Medical CMC-Medical Ludhiana Solved Paper-2007

  • question_answer
    In a triode valve, the cathode, grid and plate potentials are respectively 0, -2 V and 80 V. If an electron is emitted from the surface of cathode with kinetic energy 3eV, then the kinetic energy of electron when it reaches the plate wilt be

    A)  80 eV                                   

    B)  82 eV

    C)  78 eV                                   

    D)  83 eV

    Correct Answer: D

    Solution :

    As plate is at positive potential, so energy of electron moving towards plate will increase. Energy of electron while reaching the plate = 80 eV + 3 eV = 83 eV


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