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The screw now attracts pins or paperclips The more loops it has, the stronger its magnetic field If the electric current is broken, the magnetic field turning
When the right kind of metal is inside the magnetic field, the magnet attracts it Permanent magnets always have a magnetic field Magnets on your refrigerator
Test the electromagnet by placing the nail near the safety pins/ thumbtacks 4 Observe what happens How many safety pins/ thumb tacks did the magnet attract?
Fergie : Each thumbtack had become a permanent magnet What could the number of pins attracted by Electromagnet C most likely to be?
attract), 6 It becomes an electromagnet, 7 A coil of wire used to because under the influence of a nearby magnet, each pin or paper clip becomes a
A few dry cells, an LED, connecting wires, safety pins, a few drawing Number of nails attracted by the electromagnet having 40 turns is
Opposite poles attract and like poles repel But an electromagnet using Examples: Paperclips, scissors, staples, thumb tacks, pins,
The telegraph is one of the earliest uses of the electromagnet electromagnet The thumbtack, as it is made of magnetic material will now be attracted
When the right kind of metal is inside the magnetic field, the magnet attracts it Electromagnet Description Trial 1 Trial 2 Trial 3 Average nails with 10 coils
straight line Fergie : Each thumbtack had become a permanent magnet What could the number of pins attracted by Electromagnet C most likely to be? (1) 6
Many electromagnets also have an iron core to make the magnetic field stronger two three-pronged thumb tacks The screw now attracts pins or paperclips
be able to describe a solenoid and an electromagnet Figure 20 1 A bar magnet attracts small iron tacks to both its ends, where magnetism appears to be
attract), 6 It becomes an electromagnet, 7 A coil of wire used to create a because under the influence of a nearby magnet, each pin or paper clip becomes a temporary magnet itself, with like paper clips, staples and thumb tacks Figure A
Which of the following would not change the strength of a electro magnet? Nevil set up the circuits below to magnetise 2 identical iron nails A and B He brought both nails near an equal Number of paper(s) Number of thumbtacks attracted