7Px 29 Mahuru 20117Px 29 Mahuru 2011What we will do What we will learnPreliminaries and roll. That it is important to start

well

Compare the steady state of an LR DC circuit with the transient start-up situation

That there is a “shake-down” period before things even out

Extend our knowledge yesterday into the transient state using the “blurb” for Unit 7

The importance of the ratio of L to R, the relevance of 37% and 63% and the link between Inductor Voltages and Circuit Currents

Examine the amount of energy stored in an inductor

How to find the amount of stored energy

Set a due date for Unit 7 HW and have some HRT

How to influence our workstream and use time wisely

7 Physics Homework MarkingNo. of marks

What for

1 Having sketches and FULL working

1 Neat presentation and down-page format

1 Answer underlined and units given

1 Self marked and all correct – eventually

1 In on time and signed for (“This is my own work”…….)

Total A mark out of five that will contribute to the “homework” grade in the reports

Homework aheadHW item Skills practiced Induction Unit 2Due Wednesday 28 Sept 11

Faraday’s Law and Lenz’s Law

Induction Unit 3Due Monday 03 Oct 11

Direction of Induced Voltage

Induction Unit 4Due Monday 03 Oct 11

Mutual Inductance

Induction Unit 5Due Wednesday 05 Oct 11

Transformers

Induction Unit 6Due Friday 07 Oct 11

Self Inductance

Induction Unit 7Due Friday 07 Oct 11

Transient Voltages in LR DC circuits