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Magnetic Fields and Forces

Magnetic Fields and Forces. Facts about Magnetism. Magnetic Field. Example.

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Magnetic Fields and Forces

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  1. Magnetic Fields and Forces

  2. Facts about Magnetism

  3. Magnetic Field

  4. Example Particle 1, with a charge q1 = 3.60 μC and a speed of v1 = 382 m/s, travels at right angles to a uniform magnetic field. The magnetic force it experiences is 4.25 x 10-3 N. Particle 2, with a charge of q2 = 5.30 μC and a speed of v2 = 1.30 x 103 m/s, moves at an angle of 55.0º relative to the same magnetic field. Find (a) the strength of the magnetic field and (b) the magnitude of the magnetic force exerted on particle 2.

  5. Direction of the magnetic force? Right Hand Rule To determine the DIRECTION of the force on a POSITIVE charge we use a special technique that helps us understand the 3D/perpendicular nature of magnetic fields. • The Fingers = • The Thumb = • The Palm =

  6. Example Determine the direction of the unknown variable for a proton moving in the field using the coordinate axis given

  7. Charges moving in a wire Up to this point we have focused our attention on PARTICLES or CHARGES only. The charges could be moving together in a wire. Thus, if the wire had a CURRENT (moving charges), it too will experience a force when placed in a magnetic field. You simply used the RIGHT HAND ONLY and the thumb will represent the direction of the CURRENT instead of the velocity.

  8. Applications of CCW being deflected in a Magnetic Field

  9. Calculating Force on a CCW

  10. Example A 36-m length wire carries a current of 22A running from right to left. Calculate the magnitude and direction of the magnetic force acting on the wire if it is placed in a magnetic field with a magnitude of 0.50 x10-4 T and directed up the page.

  11. WHY does the wire move? The real question is WHY does the wire move? It is easy to say the EXTERNAL field moved it. But how can an external magnetic field FORCE the wire to move in a certain direction?

  12. Determining the direction of the magnetic field around a CCW

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