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11.Dual Nature of Radiation and matter
medium
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
A
$B$ is increased $208$ times
B
$E$ is increased $208$ times
C
$B$ is increased $14.4$ times
D
None of these
Solution
(c) In the condition of no deflection $\frac{e}{m} = \frac{{{E^2}}}{{2V{B^2}}} $
$\Rightarrow $ If m is increased by $208$ times then $B$ should be increased $\sqrt {208} = 14.4\;$ $times$
Standard 12
Physics
