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steel

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steel

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A magnetized iron rod will attract unmagnetized iron.

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steel

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The student can bring one end of the bar magnet near the metal rod. If there is an attraction, the metal rod is magnetized. If there is repulsion, the metal rod is not magnetized

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lace the plotting compass near one of the poles (north or south) and mark the position where the arrowhead points with a pencil. Shift the compass so the mark is now at the edge of the compass, and repeat this process until the arrowhead indicates the opposite pole.

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An electromagnet allows for easy control of the current flowing through the coil.

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The iron bar moves towards the magnet because the magnet's magnetic field induces a magnetic charge in the bar, creating opposite poles that are attracted to each other.

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can be switched on and off

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Gold- no affect

Aluminium- no affect

copper- no effect

iron - attracted

steel- attrracted

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steel

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I) electromagnet

II) can be switched off

III) land fill usage

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Wrap a coil around the magnet and apply A.C or alternating current to the magnet. Slowly reduce current

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steel

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By using another magnet with known poles which should attract and repel if magnetised

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By turning 1 side of the rod to face a known pole of the magnet and turning the rotating the rod to the opposite side of magnetised it should attract one side and repel another if its not magnetic it should attract on both sides

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place the plotting compass on the edge of either the north or south pole. Using a pencil place a dot to where the arrow head is pointed. Move the plotting compass so that the dot is on the circumference of the plotting compass. Repeat until the arrow head points at the opposite pole

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As the magnet induces a south pole on the iron bar which magnetizes it and causes the iron bar to attract the magnet

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Place the compass near the magnet on a piece of paper and mark the direction the needle points. Move the compass to different spots in the magnetic field, marking the needle direction each time. After that, connect the marks to show the magnetic lines and repeat from different starting points to draw multiple field lines which will begin from the magnet's north pole and it will curve to the south pole

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Gold : No effect

Aluminium : No effect

Copper : No effect

Iron : Attracted by the magnet

Steel : Attracted by the magnet

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Steel

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(i) Electromagnet

(ii) Electromagnet can be switched on/off

(iii) Crane that uses electromagnet to lift up heavy materials

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It can be demagnetised by heating it at high temperature level

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Steel

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If the iron rod has become a magnet, it will attract the unmagnetised iron

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The student can take the end of bar magnet and put it close to the end of the metal rod and if there is attraction, it means that the metal rod is a magnet. However, if there is repulsion, that means the metal rod is not a magnet

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The iron bar moves towards the magnet because the magnet's field makes it an induced magnet with opposite poles and the two unlike poles will then be attracted to each other

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The current that flows through the coil can be controlled easily using electromagnet