IB Chapter 20 21 Test Review

Key:

20:3 - chapter 20, problem 3

21-3 - read section 21-3 in your book- conceptual question answered with words

The links at the end of the lines take you to related videos. Very related.

Check out the Review PowerPoint I made: Review 20-21.pptx (I am really very excited about this)

Do 3 out of 4:

1. A solenoid

A) Induced EMF (21:6), Like Prequiz 21.1 #5 PreQuiz21 1#5 - remember - you can ignore the length of the solenoid, it is the cross sectional area that matters with an axial B field.

B) Alternators (general) Study section (How do they generate emf?) (Study section 21-5 in your book)

C) Transformer voltage and windings. Like problem 21:30 Like Prequiz 21.2 #4 PreQuiz21 2#4

D) Current in secondary of a transformer Study section 21-7, like problem 21:32, Like Prequiz 21.2 #5 PreQuiz21 2#5

E) Calculate the energy lost by transmission lines (21-7: Study example 21-12 on p. 597)

2. Electron accelerated through a potential

A) Accelerated ion problem. (eV = 1/₂mv² formulas given on test) Like problem (17:11) Accelerated Ions Example 1

B) Motion of moving charged particle in a magnetic field (20:9), Like Prequiz 20.2 #4 PreQuiz20 2#4

C) Electric field to make it go straight. (20:16) Like Prequiz 20.2 #4-5 PreQuiz20 2#5

D and E - the Hall effect. Study my video

Hall Effect Explained

and also

http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/hall.html

3. Changing flux in a loop of wire

A) What is the •EMF induced in the loop? (21:6), Like Prequiz 21.1 #5 PreQuiz21 1#5

B) What •current flows? Indicate the •direction of the current with an arrow. Prequiz 21.1 #5PreQuiz21 1#5

C) Power generated (like the questions on Prequiz 21.1 #5), Application of energy to force. (like the many small questions at the end of Prequiz 21.1 #5) PreQuiz21 1#5

D) Metal bar sliding through magnetic field. Like problem PreQuiz 21.2 #2 Direction: PreQuiz21 1#4 Getting the Number: PreQuiz21 2#2

E) Indicate (CW or ACW) the direction of the induced current. Like Prequiz 21.1 #1-4: Directions of induced currents for PQ 21.1 PreQuiz 21.1 - Also explained here: Direction of Current in Magnetic Induction

PreQuiz21 1#1 PreQuiz21 1#2 PreQuiz21 1#3 PreQuiz21 1#4

4.

A) and B) Force on current carrying wire. Like Prequiz 20.2 #1(PreQuiz20 2#1 - only at 90 degrees), Like Problem 20:3

C) Force on a charged particle moving in a magnetic field. Like Prequiz 20.2 #3 PreQuiz20 2#3

D) Force on current carrying wire. like problem 20:3, but with direction. Like Prequiz 20.2 #2 PreQuiz20 2#2

E) Find the direction of the missing quantity using the right hand rule. Like Prequiz 20.1 #4PreQuiz 20.1 PreQuiz20 2#4 - Also Explained here: Force on current carrying wires