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Magnets

Magnets. Intro to Magnets pHET. Magnetic Force on a Charged Paticle. (B). (T(tesla)). (F). (N). Magnetic field = magnetic force on charge (magnitude of charge)(speed of charge) Right Hand Rule . (v). (m/s). (q). (C).

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Magnets

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  1. Magnets • Intro to Magnets • pHET

  2. Magnetic Force on a Charged Paticle (B) (T(tesla)) (F) (N) Magnetic field = magnetic force on charge (magnitude of charge)(speed of charge) Right Hand Rule (v) (m/s) (q) (C)

  3. A proton moving east experiences a force of 8.8x10-19N upward due to the Earth’s magnetic field. At this location, the field has a magnitude of 5.5x10-5T to the north. Find the speed of the particle.

  4. In an electron in an electron beam experiences a downards force of 2.0x10-14N while traveling in a magnetic field of 8.3x10-2T west, what is the direction and magnitude of the velocity? A uniform 1.5T magnetic field points north. If an electron moves vertically downward (towards the ground) with a speed of 2.5x107 m/s through this field, what force (magnitude and direction) will act on it? An alpha particle (the nucleus of a helium atom, carrying a charge of 3.2x10-19C) moves at 5.5x107 m/s at a right angle to the magnetic field. If the particle experiences a force of 1.5x10-14N due to the magnetic field, then what is the magnitude of the magnetic field?

  5. Electromagnets

  6. Magnetic Force in a Wire Fmagnetic = BI(length of wire) *use right hand rule for direction **Only use when the magnetic field and current are perpendicular to one another A straight segment of wire has a length of 25 cm and carries a current of 5.0 A. If the wire is perpendicular to a magnetic field of 0.60 T, what is the magnitude of the magnetic force?

  7. A 6.0 m wire carried a current of 7.0 A toward the +x direction. A magnetic force of 7.0x10-6 N acts on the wire in the –y direction. Find the magnitude and direction of the magnetic field producing the force. • The magnetic force acting on a wire that is perpendiculare to a 1.5 T uniform magnetic field is 4.4 N. If the current in the wire is 5.0 A, what is the length of the wire that is inside the magnetic field? • A 1.0 m long wire carries a 10.0 A current that is perpendicular to a 0.05 T magnetic field. What is the magnitude of the force of the magnetic field?

  8. Wires side by side with current in each Current in the same direction, force between the wires is attractive Current in the opposite directcion, force between the wires is repulsive

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