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A large cyclotron directs a beam of $\mathrm{He}^{++}$ nuclei onto a target with a beam current of 0.250 $\mathrm{mA}$ . (a) How many $\mathrm{He}^{++}$ nuclei per second is this? (b) How long does it take for 1.00 $\mathrm{C}$ to strike the target? (c) How long before 1.00 $\mathrm{mol}$ of $\mathrm{He}^{++}$ nuclei strike the target?

(a) $n=7.81 \times 10^{14} \mathrm{He}^{++}$ nuclei(b) $\Delta t=4000 \mathrm{s}$(c) $\Delta t=7.71 \times 10^{8} \mathrm{s}$

Physics 102 Electricity and Magnetism

Chapter 20

Electric Current, Resistance, and Ohm's Law

Current, Resistance, and Electromotive Force

University of Michigan - Ann Arbor

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Lectures

09:29

In physics, a current is a…

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