16 - Magnetic Fields --

# 16 - Magnetic Fields -- - PHYS FALL 2009 Magnetic Fields...

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PHYS FALL 2009 Magnetic Fields Magnetic Forces 9/30/09

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Summary When both electric and magnetic felds are present, a moving charge will Feel a combined Force. ! F = q ! E + q ! v " ! B This is known as the Lorentz ±orce ! F = q ! E ! F = q ! v " ! B
Magnetic Force A positive charge enters a uniform magnetic ±eld as shown. What is the direction of the magnetic force? 1) out of the page 2) into the page 3) downwards 4) upwards 5) to the left

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Magnetic Force A positive charge enters a uniform magnetic ±eld as shown. What is the direction of the magnetic force? 1) out of the page 2) into the page 3) zero 4) to the right 5) to the left
Example A uniform magnetic Feld B, with magnitude 1.2 mT is directed vertically upward throughout the volume of a laboratory chamber. A proton with kinetic energy 5.3 MeV enters the chamber, moving horizontally from south to north. What magnetic de±ecting force acts on the proton as it enters the chamber? ²rom the kinetic energy Fnd the velocity .

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16 - Magnetic Fields -- - PHYS FALL 2009 Magnetic Fields...

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