Magnetic Effects Of Current Question 400
Question: Three particles, an electron (e), a proton (p) and a helium atom (He) are moving in circular paths with constant speeds in the x - y plane in a region where a uniform magnetic field B exists along z - axis. The times taken bye, p and He inside the field to complete one revolution are $ t_{e} $ , $ t_{p} $ and $ t_{He} $ respectively. Then,
Options:
A) $ t_{He}>t_{p}=t_{e} $
B) $ t_{He}>t_{p}>t_{e} $
C) $ t_{He}=t_{p}=t_{e} $
D) None of these
Show Answer
Answer:
Correct Answer: B
Solution:
[b] $ T=2\pi m/qB $ , $ ( \frac{m}{q} )_He>( \frac{m}{q} )_p>( \frac{m}{q} )_e $
$ \therefore t_{He}>t_{p}>t_{e} $
BETA
