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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) minimum

magnitude 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 velocity

and 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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Rutgers, The State University of New Jersey

Numerade Educator

Simon Fraser University

McMaster University

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