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# An elcctron is moving at $7.20 \times 10^{6} \mathrm{m} / \mathrm{s}$ in a magnctic ficld of strength 83.0 $\mathrm{mT}$ . What is the (a) maximum and (b) minimummagnitude of the force acting on the electron due to the field? (c) At one point the electron has an acceleration of magnitude$4.90 \times 10^{14} \mathrm{m} / \mathrm{s}^{2}$ . What is the angle between the electron's velocityand the magnetic field?

## (a) $|\vec{F}|_{\max }=9.56 \times 10^{-14} \mathrm{N}$(b) $|\vec{F}| \min =0 .$(c) $\phi=0.267^{\circ}$

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##### Christina K.

Rutgers, The State University of New Jersey

LB
##### Farnaz M.

Simon Fraser University

### Video Transcript

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Kansas State University
##### Christina K.

Rutgers, The State University of New Jersey

LB
##### Farnaz M.

Simon Fraser University