# AT Cycle 31

## 3/17 - 3/22

Th 3/17

F 3/18

M 3/21

T 3/22

### π΄β 1: Th 3/17, π‘β 3: Th 3/17 - motional emf

NJ GPA Testing

Test - 7:40 - 9:40 (120)
1 - 9:45 - 10:31 (46)
2 - 10:36 - 11:12 (36)
3 - 11:17 - 11:53 (36)
4/L - 11:58 - 12:44/39 (46/41)
L/4 - 12:49/44 - 1:30 (41/46)
5 - 1:35 - 2:10 (35)
6 - 2:15 - 2:50 (35)

QUIZ on Induction Review Today!

Daily check-in: motional emf

Today, after the check-in, we'll work on some problems from the textbook Chapter 30 involving motional emf:

Required: 33, 34, 35

Homework: Finish any of the above problems.

### π₯ 1: M 3/21 lab, π¨ 3: F 3/18 lab - Faraday's Law AP Problems

NJ GPA Testing (pd 3)

Test - 7:40 - 9:40 (120)
1 - 9:45 - 10:31 (46)
2 - 10:36 - 11:12 (36)
3 - 11:17 - 11:53 (36)
4/L - 11:58 - 12:44/39 (46/41)
L/4 - 12:49/44 - 1:30 (41/46)
5 - 1:35 - 2:10 (35)
6 - 2:15 - 2:50 (35)

Today, continue working on the following AP problems involving Faraday's Law:

Required: 1981E3, 1989E2, 1994E2, 2009E3, 1992E3 [TYPO in 1992E3: I=Ξ±(1-Ξ²t)]

If you finish early, you may start watching the homework videos.

Homework: Quiz Wednesday, March 23rd on all of Faraday's Law! Upload all solutions to first 5 AP problems to βοΈ Google Classroom by Tuesday, March 22nd at 10pm. Watch the following videos on the electric field induced by a changing magnetic field. Before watching though, think about the following situation. So we know by F = qv x B that a MOVING charge in a magnetic field feels on a force and can be made to move. Let's say we have a loop sitting in a constant magnetic field at first. The charges sitting in the loop are not moving - even though these charges are in a magnetic field, there are no forces on the charges because their velocity is zero. But as soon as we try to change that magnetic field, all of a sudden, the charges start to move - a current is induced. That implies that there is a FORCE on those charges causing them to accelerate from REST. Where does that force come from? Can it be a magnetic force dictated by F = qv x B? If not, what kind of force is it? Seriously think about these questions! Now watch the videos.