Download presentation

Presentation is loading. Please wait.

1
**Electromagnetic Induction**

Chapter 33 Electromagnetic Induction Phys Chapter 33

2
Demo Faraday Phys Chapter 33

3
Some experiments Phys Chapter 33

4
Motional emf Phys Chapter 33

5
Motional emf (cont.) Reach equilibrium Phys Chapter 33

6
Problem 33.1 A potential difference of V is developed across a 10-cm long wire as it moves through a magnetic field at 5.0 m/s. The magnetic field is perpendicular to the wire axis. What are strength and direction of field? Phys Chapter 33

7
**Problem 33.1 (ans) At equilibrium Fm Fe Out of page**

Phys Chapter 33

8
**Induced current --moving charges in B field, force --> current**

--current-carrying wire in field, force Phys Chapter 33

9
Do workbook 33.1 Phys Chapter 33

10
Eddy currents Phys Chapter 33

11
Do workbook 33.2 & 4 Phys Chapter 33

12
Eddy currents (cont.) Phys Chapter 33

13
Demo eddy currents Phys Chapter 33

14
Do workbook 33.5 & 7 33.5 & 7 Phys Chapter 33

15
Magnetic flux Phys Chapter 33

16
Do workbook 33.9 & 11 Phys Chapter 33

17
Lenz’s law There is an induced current in a closed, conducting loop if and only if the magnetic flux through the loop is changing. The induced current creates an induced magnetic field which opposes the change in flux. --changing flux produces induced current --induced current creates induced field --induced field opposes the change Phys Chapter 33

18
Do workbook 33.12, 13 & 19 Phys Chapter 33

19
Problem 33.9 The current in the solenoid is decreasing. The solenoid is surrounded by a conducting loop. Is there a current in the loop? If so, is the current in the loop cw or ccw? Phys Chapter 33

20
**Problem 33.9 (ans) Find change in flux Initially ∆ B1 **

Change in flux to left Find induced field later Induced field points to right B2 Find induced current Induced current is clockwise from behind Phys Chapter 33

21
**Induced fields field is there independent of wire**

Phys Chapter 33

22
**Faraday’s law --law of nature --usually helpful -field can change**

-area can change -both can change Phys Chapter 33

23
Do workbook 33.21 Phys Chapter 33

24
Problem 33.12b The loop is being pushed out of the 0.20 T magnetic field at 50 m/s. The resistance of the loop is 0.20 . What are the direction and magnitude of current in the loop? Phys Chapter 33

25
Problem 33.12b (ans) L w Counter-clockwise Phys Chapter 33

26
Problem 33.35 Two 20-turn coils are tightly wrapped on the same 2.0-cm-diameter cylinder with 1.0-mm-diameter wire. The current through coil 1 is shown. A positive current is into the page at the top of the loop. Determine the current in coil 2 as current vs. time t = 0 s to 0.4 s. (Assume field of coil 1 passes completely through coil 2. 0.1 0.3 Phys Chapter 33

27
Problem (ans) (+) I1 d2/dt B1 2 2 I2 Phys Chapter 33

28
**(+) I1 I2 Problem 33.35 (ans) Right to left through resistor**

Phys Chapter 33

29
Generator Phys Chapter 33

30
Transformer Phys Chapter 33

31
**Coulomb and non-Coulomb electric fields**

Phys Chapter 33

32
**Maxwell and induced magnetic field**

-symmetric in E and B Phys Chapter 33

33
E & M equations Phys Chapter 33

34
Maxwell’s equations Phys Chapter 33

35
**Maxwell-no charges or current**

+math Light is an E&M wave!!! Phys Chapter 33

36
EM waves Phys Chapter 33

37
Problem 33.49 A U-shaped conducting rail that is oriented vertically in a horizontal magnetic field. The rail has no electrical resistance and does not move. A slide wire with mass m and resistance R can slide up and down without friction while maintaining electrical contact with the rail. The slide wire is release from rest. Describe the motion of the slide wire. Find the terminal velocity of the slide wire Phys Chapter 33

Similar presentations

Presentation is loading. Please wait....

OK

Chapter 31 Faraday’s Law.

Chapter 31 Faraday’s Law.

© 2018 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on motion force and pressure for class 9 Ppt on modern methods of rainwater harvesting Product mix ppt on nestle water Ppt on rational numbers for class 8 free download Ppt on power system harmonics pdf Ppt on sea level rise chart Ppt on wheel balancing Ppt on object-oriented programming Ppt on diffusion in daily life Ppt on network theory business