Hi, I have this problem and I need some explanation and help to solve it:(adsbygoogle = window.adsbygoogle || []).push({});

An electron is injected at t=0sec with a velocity of v_{o}=(2*10^6 m/s) i into a region with parallel electric field E=(1500V/m)j and B=(-.2T)j,respectively.

Calculate the subsequent motion.

What I did is that I know that the motion will be a circular one.

then I computed R =m*v/(q*B)

Can I compute R this way since we have electric and magnetic fields together??

Also How can I find the acceleration? when I do V^{2}/R I dont get the right answer at the back of the textbook.

Thank you

B

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# Homework Help: Magnetic field

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