{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

w09ch19notesforweb

# w09ch19notesforweb - Physics 1B schedule Winter 2009...

This preview shows pages 1–12. Sign up to view the full content.

Physics 1B schedule Winter 2009. Instructor: D.N. Basov [email protected] HW: Ch15: 1,10,11,13,15,17,20,24,27,28,30,32,36,38,43,46,48 Ch16: 1,3,5,8,12,15,19,22,23,25,29,31,33,35,43,45,47,49,60 Ch17: 1,3,8,9,11,13,16,19,20,23,31,33,39,45,52,60 Ch18: 1,3,5,7,13,17,21,26,31,33,35, Ch19: 1,3,8,9,11,15,19,22,24,27,29,34,37,38,41,44,47,49,57,61 Ch20: 1,5,8,11,13,16,18,23,25,27,29,31,34,37,39, Quizzes: Final exam: all material in ch 15-21 HW problems, problems in class, more… no make up final for any reason 4 best out of 5 No make-up quizzes for any reason OH Fri 4-5pm, 6-7pm Lecture: discussion of the final exam Lecture: AC circuits Lecture: Energy of the magnetic field 10: March 9 Quiz 5: chapter 20 Lecture Inductance, Inductors Lecture: Faraday’s law, Lenz’s law 9: March 2 Induced EMF Quiz 4: chapter 19 Lecture: current loop, solenoid 8: Feb 23 Lecture: torque on current loop, Ampere’s law Lecture: Magnetism University Holiday 7: Feb 16 Quiz 3: chapter 17-18 Lecture: RC circuits Lecture: Kirchhoff’s rules 6: Feb 9 Lecture: Resistors, series parallel Lecture: Ohm’s Law Resistivity, Electric power Lecture: Capacitors with dielectrics, Electric current 5: Feb 2 Quiz 2: chapter 16 Lecture: capacitor combinations Lecture: capacitance 4: Jan 26 Quiz 1: chapter 15 Lecture: Potential University Holiday 3: Jan 19 Lecture: Gauss law/examples Lecture: Electric Flux & Gauss’s law 2: Jan 12 Lecture: the Electric field Lecture: The Coulomb law, Lecture: Intro, 15.1-15.3 1:Jan 5 Friday Wed Mon Week T.A.: A: Zhoushen Huang [email protected] B: Andreas Stergiou, [email protected] Last update: Jan 30, 2009

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

View Full Document
19 Magnetism
Bar Magnet [19-1] • Bar magnet ... two poles: N and S Like poles repel; Unlike poles attract. • Magnetic Field lines: (defined in same way as electric field lines, direction and density) Does this remind you of a similar case in electrostatics? N S

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

View Full Document
Magnetic Field Lines of a bar magnet Electric Field Lines of an Electric Dipole N S E r B r Bar Magnet [19-1]
Magnetic field produces force on moving charges B v θ F q A charge q moving with velocity v in a magnetic field B experiences a force F. sin Fq v B = Force: Depends on the velocity and magnetic field Depends on angle between vectors v and B Is max when vectors v and B are perpendicular Is perpendicular to the direction of B and v 19.3 Magnetic Fields

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

View Full Document
19.3 Magnetic Fields sin Fq v B θ = F r F r + direction of F given by the right hand rule -- F r Force: Depends on the velocity and magnetic field Depends on angle between vectors v and B Is max when vectors v and B are perpendicular Is perpendicular to the direction of B and v B v F q
Magnetic field magnitude defined sin sin Fq v B F B qv θ = = Units of B: Ns Cm = Tesla (T) Also commonly used gauss (g) 10 4 gauss=1Tesla 19.3 Magnetic Fields Nicola Tesla 1865-1943

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

View Full Document
Magnetic field notations x x x x x x x x x x x x x x x x x x B field into page B field out of the page think of arrows 19.3 Magnetic Fields
19.3 Magnetic Fields Electric Field: Magnetic Field:

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

View Full Document
Electric Field vs. Magnetic Field Electric Magnetic Source Charges Moving Charges Acts on Charges Moving Charges Force F = Eq F = q v B sin( θ ) Direction Parallel E Perpendicular to v,B Field Lines Magnetic Field:
length L in a perpendicular B field F F= sum of forces on all charges = qvB FB I L = L since q= ρ LA then F= ρ LAvB q IA v t = Finally ρ is the charge/volume I q B A since L Magnetic force on a current carrying wire 19.4

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 52

w09ch19notesforweb - Physics 1B schedule Winter 2009...

This preview shows document pages 1 - 12. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online