A scientist is doing an experiment on a beam of electrons travelling at right angles to a

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A scientist is doing an experiment on a beam of electrons travelling at right angles to a uniform magnetic field of flux density B. The graph shows the variation of the magnetic force F acting on an electron with the speed v of the electron.


The gradient of the graph is G. The magnitude of the charge on the electron is e.

What is the correct relationship for the magnetic flux density B?
A. B = G

B. B = G × e

C. B = G/e

D. B = e/G

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Cambridge International AS And A Level Physics Coursebook

ISBN: 9781108859035

3rd Edition

Authors: David Sang, Graham Jones, Gurinder Chadha, Richard Woodside

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