Electromagnetic force increasing/decreasing

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NooDota
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The electromagnetic force F = I*L*B * SinΘ will increase based on the value on SinΘ.What's the physical explanation for this? Why does the angle between vectors B and IL matter?
 

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Because there is a cross product between B and V (vectors) when computing magnetic force on moving particles.

Particles moving parallel to a magnetic field do not experience a magnetic force.
 
Oh, right. I should have known that.
 

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