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KEy question: How can you predict the direction of a motor?
KEy question: How can you predict the direction of a motor?
Task 1 - DO NOW
Task 1 - DO NOW
What is this? Hoiw do you think that it works?
Task 2 - Think BAck
Task 2 - Think BAck
Have a look at the diagrams in task 2 of the companion sheet.
Which of the scenarios A or B do will produce the stronger electromagnet?
Write A or B in the Yellow box.
Task 3 - Mini prac.
Task 3 - Mini prac.
Homopolar motors
Homopolar motors
Watch the demo in class and then have a go at building your own motor.
How could you make it spin faster?
Can you make it spin the other way?
The Motor effect
The Motor effect
The direction that a current carrying wire will move when placed in a magnetic field is predictable.
All you need to know is:
The direction of the current +ve to -ve
The direction of the magnetic field N ~> S
Here is a quick demonstration of the force on a current carrying wire.Â
Please watch it on youtube
Task 4 - Your turn
Task 4 - Your turn
Practise by completing task 4 on the companion sheet.
It is ok to say that the direction on the force is to the left, right, up, down, into the paper and out of the plain of the paper.
Remember that if you don't look a fool in the exam you're not doing it right.
motors - how do they work
motors - how do they work
Task 5 - past papers
Task 5 - past papers
Have a go at the past paper questions in the companion sheet
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