Lecture 12 - Quiz results Quiz 2 results...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
uiz 2 results Quiz 2 results • <Scantron>+<Problems> = 32.6/51+36.7/49. • One week to address grading concerns from receipt of your quiz during studio.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Electromagnetism in one slide • Electric charges q establish electric fields E everywhere in space. An electric charge experiences am electric force F E =q E , where E is the electric field at the charge’s position, and q is the magnitude of the charge. • Moving electric charges result in electric currents; electric currents establish magnetic fields B everywhere in space. p • A moving charge q experiences a magnetic force F B =q v × B , with v the velocity of the charge and B the agnetic fields at the location of the charge magnetic fields at the location of the charge. • Magnetic fields can also be established by time-varying electric fields. Likewise, electric fields result from time- arying magnetic fields These coupled effects produce varying magnetic fields. These coupled effects produce electromagnetic waves.
Background image of page 2
agnetic forces and fields Magnetic forces and fields • Electric currents establish magnetic fields B . The unit of B is the Tesla(T). Also commonly used is the Gauss(g), 1 T=10 4 g. For reference, the earth’s magnetic field is 0 - =0 5g B e 5×10 5 T=0.5g. • Moving charged objects experience a magnetic force F =q v × B , where q=charge, v =velocity, and B =magnetic B field. As per the cross product rule, F B v and F B B . F B =0 if q=0 or v =0 or B =0 or v B . This week we will assume that we can somehow produce any B-field we care to use, using something we will loosely call a “magnet”.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Earth’s magnetic field • The field lines emerge from the magnetic north pole , which is in Antarctica! They enter the magnetic south pole, in Canada.
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 15

Lecture 12 - Quiz results Quiz 2 results...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online