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PHYS1220 Lecture Notes - Lecture 8: Dipole Magnet

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School
University of Newcastle
Department
Physics
Course
PHYS1220
Professor
Michael Gladys

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Document Summary

Magnetic fields defined in terms of a magnetic force. Force is exerted only on a moving charged particle. When a charged particle moves parallel to the magnetic field vector, the magnetic force acting on the particle is zero. If an electric charge is stationary with respect to a magnetic field, no effect is observed. If a charge moves across a magnetic field then the charge experiences a force acting at right angles to its motion: given by the right-hand rule. Thumb in the direction of the velocity. Palm in the direction of the force. Fingers in the direction of the b field: only applies for a positive particle. If the particle is negative, it can be considered that the hand is pushing the particle. Force due to a current in a wire. If a wire is immersed in a perpendicular magnetic field: each moving electron experiences a force: Phys1220: the total force on the wire:

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

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Related Questions

Ā 

1)Which statements about the force on a charged particle placed in a magnetic field are true?

a)A magnetic field always exerts a force on a charged particle.

b)The direction of the force is along the magnetic field.

c)The force is a maximum if the particle is moving in the direction of the field.

d)The force causes the particle to gain kinetic energy.

e)A magnetic force is exerted only if the particle is moving.

A charged particle moves and experiences no margnetic force. From this we can conclude that:

a) No magnetic field exist in that region of space.

b) The particle is moving parallel to the magnetic field.

c) Either no magnetic field exist, or the particle is moving parallel to the field.

d) The particle is moving at right angles to the magnetic field.

Which one of the following statements concerning the magnetic forceon a charged particle in a magnetic field is true?
a)The magnetic force is a maximum if the particle isstationary.
b)The magnetic force is a zero if the particle moves perpendicularto the field.
c)The magnetic force is a maximum if the particle moves parallel tothe field.
d)The magnetic force acts in the direction of motion for apositively charged particle.
e)The magnetic force depends on the component of the particle'svelocity that is perpendicular to the field.