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Magnetic fields (A-level only)

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Question 10

A cyclotron is used to accelerate triply-charged ions of mass $M\,$ and charge $+ 3 e$ in a region of uniform magnetic flux density $B$ .

To maintain resonance and continuously accelerate the ions across the gap between the dees, an alternating potential difference of frequency $f\,$ is applied.

What is the required frequency $f\,$ of this alternating potential difference?

A

$3eB2πM\frac{3eB}{2\pi M}$

B

$2πM3eB\frac{2\pi M}{3eB}$

C

$3eBπM\frac{3eB}{\pi M}$

D

$3eM2πB\frac{3eM}{2\pi B}$

Markscheme

Magnetic fields (A-level only) Questions

A Level
Physics
Magnetic fields (A-level only)

66 exam-style questions on AQA A Level Physics Magnetic fields (A-level only), covering Magnetic flux density (A-level only), Moving charges in a magnetic field (A-level only), Magnetic flux and flux linkage (A-level only), Electromagnetic induction (A-level only), Alternating currents (A-level only), and The operation of a transformer (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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