2. Questions Bank
  3. JEE Main & Advanced
  4. Physics
  5. Photo Electric Effect, X- Rays & Matter Waves

JEE Main & Advanced Physics Photo Electric Effect, X- Rays & Matter Waves Question Bank Cathode Rays and Positive Rays

  • question_answer
    In Thomson experiment of finding \[e/m\] for electrons, beam of electron is replaced by that of muons (particle with same charge as of electrons but mass 208 times that of electrons). No deflection condition in this case satisfied if [Orissa (Engg.) 2002]

    A)            B is increased 208 times

    B)            E is increased 208 times

    C)            B is increased 14.4 times

    D)            None of these

    Correct Answer: C

    Solution :

               In the condition of no deflection \[\frac{e}{m}=\frac{{{E}^{2}}}{2V{{B}^{2}}}\Rightarrow \] If m is increased by 208times then B should be increased \[\sqrt{208}=14.4\ \]times


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