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Physics: Chapter 21 review
Magnetic Force stuff
7
Physics
Undergraduate 2
11/06/2011

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Term
Hall Effect Explanation
Definition

If an electric current flows through a conductor in a magnetic field, the magnetic field exerts a transverse force on the moving charge carriers which tends to push them to one side of the conductor. This is most evident in a thin flat conductor as illustrated. A buildup of charge at the sides of the conductors will balance this magnetic influence, producing a measurable voltage between the two sides of the conductor. The presence of this measurable transverse voltage is called the Hall effect. Balance occurs when the perpendicular E = vxB (when there can be no more accumulation)

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Term
emf with different B fields
Definition
emfnet=L*I(Bleading-BTrailing)
Term
Drift speed
Definition
v=u*E, u being the mobility
Term
Loop Rule
Definition
The sum of all the potential differences around a closed loop equals zero. The loop rule is for Conservation of Energy
Term
Lorentz Force Law
Definition

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This refers to the total force on a charge: the electric and magnetic.

When there is no force total, qE=-qvxB.  This is very useful.

Term
Magnetic Force
Definition

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Where F is the magnetic force, q is a charge, v is the velocity (and direction), and B is the magnetic field (and direction).  Keep in mind the cross product.

Another form is F=ILxB, with F, L, and B being vectors. 

Term
Right Hand Rule for Magnetic Field (2)
Definition

The right hand rule for the magnetic field can refer to two things.  In this case, it is for a line of charge. The equation is contained in the picture. 

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