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Magnetic fields (A-level only)

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Question 2

When a proton is moving at a speed $v$ perpendicular to a uniform magnetic field of flux density $B$ , it follows a path of radius $R$ .

A second proton moves at a speed $3 v$ perpendicular to a uniform magnetic field of flux density $6 B$ .

What is the radius of the path of the second proton?

$R18\frac{R}{18}$

$R2\frac{R}{2}$

$2 R$

$18 R$

Magnetic fields (A-level only) Questions

A Level
Physics
Magnetic fields (A-level only)