Magnetic Forces
The 1st Right Hand Rule determines the direction of
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Equation for force on a moving charge in a magnetic field
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Simplified Equation if angle = 90
Force on a Wire in a Magnetic Field
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Magnetic Forces
Questions
1) A 2.7 m wire carrying 750 mA of current towards the south in a uniform magnetic field experiences a force of 3.2
N to the east. Calculate
a. The strength and direction of the magnetic field.
b. The magnitude and direction of the magnetic force acting on a single electron moving westerly through
the field at 7.89x105 m/s.
2) What force does an electron (you know the q of an electron) moving to your left at 2,500m/s feel in a magnetic
field coming straight at you of strength 3 x 1010 Tesla?
a. What direction is the force acting
Magnetic Forces
1) A 2.7 m wire carrying 750 mA of current towards the south in a uniform magnetic field experiences a force of 3.2
N to the east. Calculate
a. The strength and direction of the magnetic field.
b. The magnitude and direction of the magnetic force acting on a single electron moving westerly through
the field at 7.89x105 m/s.
2) What force does an electron (you know the q of an electron) moving to your left at 4,000m/s feel in a magnetic
field coming straight at you of strength 6.2 x 1010 Tesla?
a. What direction is the force acting
Magnetic Forces
1) A 2.7 m wire carrying 750 mA of current towards the south in a uniform magnetic field experiences a force of 3.2
N to the east. Calculate
a. The strength and direction of the magnetic field.
b. The magnitude and direction of the magnetic force acting on a single electron moving westerly through
the field at 7.89x105 m/s.
2) What force does an electron (you know the q of an electron) moving to your left at 2,000m/s feel in a magnetic
field coming straight at you of strength 4.5 x 1010 Tesla?
a. What direction is the force acting
Magnetic Forces
1) A 2.7 m wire carrying 750 mA of current towards the south in a uniform magnetic field experiences a force of 3.2
N to the east. Calculate
a. The strength and direction of the magnetic field.
b. The magnitude and direction of the magnetic force acting on a single electron moving westerly through
the field at 7.89x105 m/s.
2) What force does an electron (you know the q of an electron) moving to your left at 5,500m/s feel in a magnetic
field coming straight at you of strength 4 x 1010 Tesla?
a. What direction is the force acting