P29_008 - 8. (a) Letting F = q (E + v B ) = 0, we get vB...

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8. (a) Letting ~ F = q ( ~ E + ~v × ~ B ) = 0, we get vB sin φ = E . We note that (for given values of the Felds) this gives a minimum value for speed whenever the sin φ factor is at its maximum value (which is 1, corresponding to φ =90 ). So v min = E/B =(1 . 50 × 10 3 V / m) / (0 . 400 T) = 3 . 75 × 10 3 m / s . (b) Having noted already that ~v ~ B ,wenowpo in tou ttha t ~v ×
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

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