Question 204: Magnetism and Matter

Question

A proton, an electron, and a Helium nucleus,
have the same energy. They are in circular
orbits in a plane due to magnetic field
perpendicualr to the plane. Let r
p
, r
e
and r
He
be
their respective radii, then

Accepted Answer

$$r = {{mv} \over {qB}} = {{\sqrt {2mK} } \over {qB}}$$
$${r_{He}} = {r_p} > {r_e}$$

Answer

r
e
< r
p
< r
He

Answer

r
e
< r
p
= r
He

Answer

r
e
> r
p
> r
He

Answer

r
e
> r
p
= r
He

Magnetism and Matter

A proton, an electron, and a Helium nucleus, have the same energy. They are in circular orbits in a plane due to magnetic field perpendicualr to the plane. Let r p , r e and r He be their respective radii, then

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