week-12-3-tmp

# week-12-3-tmp - For this relationship to be valid the...

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For this relationship to be valid, the velocity must be perpendicular to the field. This actually defines the magnetic field as the force per unit charge and unit of velocity: units: 1 tesla (T) = 1 N/A m B F qv If the index finger of the right hand points in the direction of the velocity of the charge, and the middle finger in the direction of the magnetic field, then the thumb indicates the direction of the magnetic force acting on a positive charge.

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More complicated situations? helical motion (spiral) v is not perpendicular to B Van Allen belts Also non-uniform B magnetic bottle
Polar Light High energy particles leaked out of the belt and interact with the earth atmosphere.

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Consider a rectangular loop: Each segment of the rectangular loop is a straight wire. The force on each segment is given by F=IlB . Using the right-hand rule, you can verify that the loop will tend to rotate in the direction indicated. The forces on the two ends of the loop produce no torque about center of the loop, because their lines of action pass through the center of the loop. The forces on the other two sides combine to produce a torque that tends to line up the plane of the loop perpendicular to the magnetic field.
A current-carrying rectangular loop of wire is placed in an external magnetic field as shown. In what direction will this loop tend to rotate as a result of the magnetic

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week-12-3-tmp - For this relationship to be valid the...

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