Download presentation

Presentation is loading. Please wait.

Published byDamian Fountaine Modified over 2 years ago

1
Phys 133 -- Chapter 321 Chapter 33 Magnetic Field

2
Phys 133 -- Chapter 322 What are magnetic phenomena? What causes magnetic fields? Magnetic field of moving charges/currents Magnetic force on moving charges/currents Magnetic torque Magnetic materials The questions

3
Phys 133 -- Chapter 323 Demo magnets

4
Phys 133 -- Chapter 324 Orients a compass Magnetism: experiments 1

5
Phys 133 -- Chapter 325 Magnetism: experiments 2

6
Phys 133 -- Chapter 326 Do Workbook 32.1, 3 & 4

7
Phys 133 -- Chapter 327 Magnetic field: wire Current produces a magnetic field too - same as magnet Right thumb rule

8
Phys 133 -- Chapter 328 Thumb along, fingers around (think circles!) Magnetic field: symbol conventions In general

9
Phys 133 -- Chapter 329 Magnetic field: vectors and field lines Arrow indicates direction compass north would point. Longer arrow, larger field Closer spacing, larger field

10
Phys 133 -- Chapter 3210 Do Workbook 32.7 & 8

11
Phys 133 -- Chapter 3211 Moving charges produce magnetic fields Magnet field: cause (cross product, 3D) remember

12
Phys 133 -- Chapter 3212 Do Workbook 32.11 & 12

13
Phys 133 -- Chapter 3213 What are the magnetic field strength and direction at the dot in the figure? Problem 32.7

14
Phys 133 -- Chapter 3214 Problem 32.7 (ans) Direction-RHR = out of page

15
Phys 133 -- Chapter 3215 --pick a generic current segment --field due to segment at location of interest --convert current segment to coordinate --sum them up, becomes integral Magnetic field: current segment Current (many moving charges) produce magnetic fields To find magnetic field produced by a wire configuration

16
Phys 133 -- Chapter 3216 Find an expression for the magnetic field at the center (P) of the circular arc. Problem 32.50

17
Phys 133 -- Chapter 3217 Problem 32.50 (ans) 1 2 3 For entire loop Direction into page (RHR)

18
Phys 133 -- Chapter 3218 d Magnetic fields: typical situations

19
Phys 133 -- Chapter 3219 Demo loop

20
Phys 133 -- Chapter 3220 Magnetic dipole A current loop

21
Phys 133 -- Chapter 3221 Do Workbook 32.18,19, 20

22
Phys 133 -- Chapter 3222 --always true --sometimes helpful (high symmetry) Ampere’s law (Currents cause magnetic fields)

23
Phys 133 -- Chapter 3223 Take a segment of path, dot product with field, write it down, find another segment, repeat, add up Path integrals

24
Phys 133 -- Chapter 3224 Do Workbook 32.23 & 24

25
Phys 133 -- Chapter 3225 --always true --sometimes helpful (high symmetry) Ampere’s law (Currents cause magnetic fields)

26
Phys 133 -- Chapter 3226 A long wire is surrounded by a thin cylindrical shell of radius R 1. The inner wire carries a current I 0 in one direction and the outer shell carries a current I 0 in the other direction. Use Ampere’s law to find the magnetic field strength everywhere. Problem Ampere

27
Phys 133 -- Chapter 3227 Problem Ampere (ans) x I 0 (in) I 0 (out) R1R1 Side view Choose concentric circle as path B is circular (RTR) Then Ampere’s law becomes r < R 1 R 1 < r

28
Phys 133 -- Chapter 3228 Solenoid

29
Phys 133 -- Chapter 3229 Uniform inside, “zero” out Solenoid

30
Phys 133 -- Chapter 3230 Force on moving charge

31
Phys 133 -- Chapter 3231 Do Workbook 32.27 & 28

32
Phys 133 -- Chapter 3232 Demo Tesla Coil

33
Phys 133 -- Chapter 3233 An electron moves in the magnetic field B=0.50 i T with a speed of 1.0x10 7 m/s in the direction shown. What is the magnetic force (in component form) on the electron? Problem 32.31

34
Phys 133 -- Chapter 3234 Problem 32.31 (ans) Direction RHR

35
Phys 133 -- Chapter 3235 Do Workbook 32.29 & 31

36
Phys 133 -- Chapter 3236 Find the strength and direction of electric and magnetic fields confined to the dashed region, such that a charged particle (q>0, m) coming from the left at speed v 0 will pass through undeflected and without speeding up. (easy one: E=0, B=0) Problem Velocity Selector

37
Phys 133 -- Chapter 3237 Problem Velocity Selector (ans) +++++++++++++ - - - - - - - - - - - - - E + Put electric field down Then Need force up if proton is to be undeflected Put magnetic field into page Then We want a y = 0

38
Phys 133 -- Chapter 3238 Force on current-carrying wire

39
Phys 133 -- Chapter 3239 Demo wire in magnetic field

40
Phys 133 -- Chapter 3240 Do Workbook 32.35 & 37

41
Phys 133 -- Chapter 3241 Force/torque on current loop

42
Phys 133 -- Chapter 3242 Do Workbook 32.40 & 41

43
Phys 133 -- Chapter 3243 Magnetic material and induced dipole

Similar presentations

OK

A permanent magnet has a north magnetic pole and a south magnetic pole. Like poles repel; unlike poles attract.

A permanent magnet has a north magnetic pole and a south magnetic pole. Like poles repel; unlike poles attract.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on the solar system Ppt on impact of information technology in banking sector Ppt on tribal communities of india Ppt on paintings and photographs related to colonial period literature Ppt on bond length and energy Ppt on obesity management systems Free download ppt on sustainable development Ppt on bank management system in java Ppt on shell and tube heat exchanger Ppt on media research analyst