Introduction
This material is meant for students who want to quickly learn basics of magnetism or just revise few things that they had forgotten during the years.
You will be able to learn:
- magnetic substances
- polarity
- law of magnetism
- magnetic induction
- magnetic field lines and magnetic field patterns
- the earth as a magnet
- electromagnetism
- how to make magnet
- how to de-magnetize magnet
Task
YOUR MAIN TASK IS:
- To watch video material about Magnetism
https://www.youtube.com/watch?v=cHuU6Lz4Amw&t=17s
- To read 10 sentences and decide whether the sentence is Right or Wrong. If sentence is wrong you must rewrite it correctly.
THE MOST IMPORTANT TASKS IS:
- To learn something new for yourself and educate yourself by using self-studying method.
Process
According to the video that you have just watched, you must decide whether this 10 statements are Right (R) or wrong (W). If sentence is wrong you must rewrite it correctly.
1. Alloys of Iron, Nickel and Aluminum are also often magnetic. ( Example - Alloy of iron, steel is also magnetic)
2. If you cut a magnet in 2 parts you simply get 2 smaller magnets.
3. Iron is said to be magnetically strong - it is easily magnetised and de-magnetised.
4.Magnetic field lines leave from the south pole and enter into the north pole of magnet.
5. By adding a large number of loops next to each other the magnetic field produced can be greatly increased, it is called solenoid.
6. Magnetic field lines indicate strength of the field by the distance between them.
7. Magnetic field lines always cross each other.
8. Any materials can be magnetised, it can be done by stroking existing magnet with other material.
9. On Earth North geographic pole is actually a magnetic South pole.
10. A magnet is attracted to one pole of another magnet and also the other pole of the magnet.
Evaluation
Maximum number of points you can get by answering each question correctly is 10 points 1 point for each question.
THE ANSWERS:
1. Alloys of Iron, Nickel and Aluminium are also often magnetic. ( Example - Alloy of iron, steel is also magnetic) (WRONG - Only Iron, Nickel and Cobalt are magnetic elements)
2. If you cut a magnet in 2 parts you simply get 2 smaller magnets. (RIGHT)
3. Iron is said to be magnetically strong - it is easily magnetised and de-magnetised. ( WRONG - Iron is said to be magnetically soft)
4.Magnetic field lines leave from the south pole and enter into the north pole of magnet. (WRONG - Magnetic field lines leave from the north pole and enter into the south pole of magnet.)
5. By adding a large number of loops next to each other the magnetic field produced can be greatly increased, it is called solenoid. (RIGHT)
6. Magnetic field lines indicate strength of the field by the distance between them. (RIGHT)
7. Magnetic field lines always cross each other. ( WRONG - they never cross each other )
8. Any materials can be magnetised, it can be done by stroking existing magnet with other material. (WRONG - only magnetic materials can be magnetised)
9. On Earth North geographic pole is actually a magnetic South pole. (RIGHT)
10. A magnet is attracted to one pole of another magnet and also the other pole of the magnet. (WRONG - it is attracted to one pole of another magnet but repelled from the other pole of the magnet)
Conclusion
RESULTS:
- 10- 9 points (Your knowledge about this theme is excellent - GOOD WORK )
- 8-5 points (Your knowledge about this theme is average, but you have understood this task WELL)
- 4-0 points ( Your knowledge about this theme is very poor and you should watch this video material once again - BUT DON'T GIVE UP! )
KEEP UP YOUR GOOD WORK!