Attraction and Repulsion of Magnets

Transcript

What happens when we bring 2 Magnets close to each other ?In this case, North Pole of One Magnet gets attracted to South Pole of Other Magnet We say Unlike Poles Attract Attract What happens when we bring 2 Magnets close to each other ?In this case, North Pole of One Magnet move away from North Pole of Other Magnet We say Like Poles Repel Repel SummaryUnlike Poles Attract MAGNET 1 North Pole South Pole attracted to attracted to MAGNET 2 South Pole North Pole Like Poles Repel MAGNET 1 North Pole South Pole repel repel MAGNET 2 North Pole South Pole What if we replace Magnet 2 with Iron Bar ?MAGNET 1 North Pole South Pole attracted to attracted to MAGNET 2 Iron Bar Iron Bar Note Iron Bar is not a Magnet It is only a Magnetic Material So, It does not have property of North Pole and South Pole What if we replace Magnet 2 with Wooden Bar ?MAGNET 1 North Pole South Pole Not attracted to Not attracted to MAGNET 2 Wooden / Plastic Bar Wooden / Plastic Bar Note Wooden Bar is not a Magnet Material So, It does not get attracted to Magnet Types of Material Magnets Non - Magnets Like poles Repel Unlike poles Attract Example - Bar Magnet, U - Shaped Magnet, Ring Magnet Magnetic Material Non - Magnetic Material Attract both poles of magnet Do not Attract with magnets Example - Iron Example - Wood, Plastic How are North and South Poles depicted in Magnets we purchase from Market ?MAGNET 1 North and South Pole Marked as N & S North Pole South Pole MAGNET 2 North Pole is indicated as White dot North Pole South Pole Table 4.2 :- (Page 71) Table 1: Table 4.2: Observing the effect of magnet through non-magnetic materials \captionsetup{labelformat=empty} S. no. Material placed between the magnet and the compass needle Observations 1. Wood Compass needle gets deflected magnet's effect is seen 2. Cardboard Compass needle gets deflected magnet's effect is seen 3. Plastic Compass needle gets deflected magnet's effect is seen 4. Glass Compass needle gets deflected magnet's effect is seenIf we place any material like wood, cardboard, plastic or a glass between a magnetic compass and a bar magnet then still compass needle gets deflected and magnet’s effect is seen