1. What we will do What we will learn 10N 23 Haratua 2017
Quick quiz and preliminaries
How to start well
Revisit diagrams of circuits using 3 lamps (twice) and describe the brightnesses and how those compare to the currents through them and the voltages across them
How to link layout, brightness, current flow and how to explain the behaviour of a circuit
See how magnetism and movement make electricity
How generators work
Extend the above to hydro-electricity with turbine and generator
How the generator idea is USED
Compare the advantages and disadvantages of hydro-electricity
Why some people like and some people dislike hydro-electricity
If time, begin 3pin plugs
How our plugs work

2. 10N – Seating Plan
Front of lab - Whiteboard

3. HW item Skills practiced
HW booklet pages on skeletal system, muscles and joints, blood and heart, circulatory system
Pages 1 - 8
Due Thursday 2nd of March 2017
Time management
Knowledge of three systems in the body
HW booklet pages 9 – 18: circulatory, breathing and digestive systems.
Due Monday 20th of March 2017
HW booklet pages 19, 27, 28, 29 Human Reproduction
Due Zenday 37th of Octember
Human Reproduction
EOT test
Due Monday 10th of April
Humans and reproduction

4. Conventional Current flows from POSITIVE to NEGATIVE

5. RESISTORS AGAIN Resistors convert …………………….. ………………………… energy into
… energy (and sometimes some ………… energy)

6. Efficiency
Efficiency is a measure of how well input energy (in this case, electrical potential) is converted into output (desired) energy. Some things are 100% efficient. E.g. electric blankets convert 100% of the electrical potential energy (EPE) into heat energy (because heat energy is what is wanted)
Some things are not 100% efficient. E.g. a toaster converts EPE into heat energy (mostly) but some is wasted as light energy too)
An incandescent (hot wire) lamp is very inefficient as we want light energy but most of the energy is converted to heat and only a small %age is converted to light)

8. Task
Draw two circuit diagrams for two circuits: each containing a battery of cells and three lamps. Draw one circuit with the light bulbs in series and the other diagram with the lamps in parallel. It is important, for circuits, to use the rules for drawing circuits. Make sure you label the positive and negative ends of the battery.
Write up a discussion comparing the brightnesses of the lamps in the circuits you have drawn. For each circuit, you should mention the current and how the circuits compare.`

9. Electromagnetic Induction…
… is the fancy way of saying “making electricity by using magnetism and movement”