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VITEEE 2014 Solved Paper
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© examsnet.com
Question : 18
Total: 120
A proton and an α -particle, accelerated through the same potential difference, enter a region of uniform magnetic field normally. If the radius of the proton orbit is 10 cm, then radius of α -particle is
10 cm
10
√
2
cm
20 cm
5
√
2
cm
Validate
Solution:
Radius of path
r
time
=
1
β
√
2
m
v
q
∴
r
α
r
p
=
√
m
α
m
p
√
q
p
q
α
or
r
α
10
=
√
4
2
⇒
r
α
= 10
√
2
cm
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