Forces on Moving Charges in Magnetic Fields Standards
... Students should understand the force experienced by a charged particle in a
magnetic field, so they can:
1) Calculate the magnitude and direction of the force in terms of q, v, and B and
explain why the magnetic force can perform no work.
2) Deduce the direction of a magnetic field from information ...
... Ben-Gurion University of the Negev
Department of Physics
Thermodynamics & Statistical Mechanics 1
... between solar wind and
earth’s atmosphere can be seen
near the north & south pole in the
form of Aurorae
... 1. The properties of magnetic field lines
2.Why don’t two magnetic lines of force intersect each other
3.Draw the magnetic field lines around a bar magnet
4.Name two safety measures commonly used in electric circuits and
5.What precaution should be taken to avoid the over loading of
... Chapter 11: Magnetic Multipoles
For a spatially localized current density
j(r), we may write B(r) = ∇ × A(r) where
Magnets exert forces Magnets have two poles
... First magnetic rocks discovered 2000
years ago in “Magnesia”
12th century Chinese used them to
make compasses and navigate
Today many uses: electric motors
Magnetism and Electromagnetism Key Terms
... Magnetism and Electromagnetism Key Terms
Solenoid|A long, helically wound coil of insulated wire.
Magnetic domain|A group of atoms whose magnetic fields are aligned in the same direction.
Magnetic field|A region in which a magnetic force can be detected.
Electromagnetic induction|The process of crea ...
32.29. Model: A magnetic field exerts a force on a moving charge
... 32.29. Model: A magnetic field exerts a force on a moving charge.
Visualize: Please refer to Figure Ex32.29.
Solve: (a) The force on a charge moving in a magnetic field is
Fon q = qv × B = (qvBsinα, direction of right-hand rule)
The direction of the force on a negative charge is opposite the d ...
Ferrofluids - SRJC | Santa Rosa Junior College
... Mechanics of Ferrofluids
• Small magnetite particles are
held in colloidal suspension
due to interparticle
electrostatic repulsion. This
is brought about by the
attraction of the hydroxide
anion to the magnetite
particles which in turn
attract the positive
Magnetotactic bacteria (or MTB) are a polyphyletic group of bacteria discovered by Richard P. Blakemore in 1975, that orient along the magnetic field lines of Earth's magnetic field. To perform this task, these bacteria have organelles called magnetosomes that contain magnetic crystals. The biological phenomenon of microorganisms tending to move in response to the environment's magnetic characteristics is known as magnetotaxis (although this term is misleading in that every other application of the term taxis involves a stimulus-response mechanism). In contrast to the magnetoception of animals, the bacteria contain fixed magnets that force the bacteria into alignment — even dead cells align, just like a compass needle. The alignment is believed to aid these organisms in reaching regions of optimal oxygen concentration.