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| you don't get a north pole and a south pole, you get 2 smaller magnets |
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decide direction by right hand rule FB = qv x B
FB = qvB
magnetic force is perpendicular to magnetic field direction |
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| Force on an electric charge moving in a magnetic field (2) |
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F = qvBsinθ if the charged particle is moving perpendicular to a uniform magnetic field, it's path is a circle |
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| force between 2 parallel wires |
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parallel currents attract, antiparallel currents repel [image] |
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tightly wrapped, long coil of wire where the interior magnetic field is almost uniform inserting a piece of iron greatly increses the magnetic field and creates an electromagnet |
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| calculates magnetic fields in situations with a high degree of symmetry |
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| Torque (τ) on a current loop |
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M=NIA N=# of loops A=area of coil
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| uses torque on a current loop to change electrical energy to mechanical energy |
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| magnet exerts a force on a current-carrying wire, converts electrical signals into mechanical vibrations |
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measures masses of atoms charged particle sent through perpendicular E and B fields, they hit the second B field, the radius of curvature depends on mass |
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B = µi/(2∏r) (µ=mag constant) |
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