Dual Nature Of Light Question 80
Question: An electron beam is moving between two parallel plates having electric field $ 1.125\times {{10}^{-6}}N/m $ . A magnetic field $ 3\times {{10}^{-10}}T $ is also applied so that beam of electrons do not deflect. The velocity of the electron is [MH CHT 2004]
Options:
A) $ 4225\ m/s $
B) $ 3750\ m/s $
C) $ 2750\ m/s $
D) $ 3200\ m/s $
Show Answer
Answer:
Correct Answer: B
Solution:
$ v=\frac{E}{B}=\frac{1.125\times {{10}^{-6}}}{3\times {{10}^{-10}}}=3750,m/s $
BETA
