I desperately need help, for I am quite lost on this question:(adsbygoogle = window.adsbygoogle || []).push({});

Consider the example of a positive charge moving in the xy plane with velocityv= cos(theta)x+ sin(theta)y(i.e., at angle theta with respect to the x axis). If the local magnetic field is in the +z direction, what is the direction of the magnetic force acting on the particle?

Express the direction of the force in terms of theta, as a linear combination of unit vectors,x,y, andz.

F = qBV

One hint given was to find the determinant expression for the cross product, but I don't know what this means.

Thanks for any replies.

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# Homework Help: Magnetic Fields & Cross Products

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