Physics » Magnetism and Faraday's Law » Permanent Magnets

Magnetic Attraction and Repulsion

Magnetic Attraction and Repulsion

Like (identical) poles of magnets repel one another whilst unlike (opposite) poles attract. This means that two N poles or two S poles will push away from each other while a N pole and a S pole will be drawn towards each other.

Do you think the following magnets will repel or be attracted to each other?

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We are given two magnets with the N pole of one approaching the N pole of the other. Since both poles are the same, the magnets will repel each other.

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We are given two magnets with the N pole of one approaching the S pole of the other. Since both poles are the different, the magnets will be attracted to each other.

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  • What is the physics behind the chemicals used to produce photocopy machine ink?,because i discover that particles of magnet are inside the ink..
    [ke6d]

    1. Precious, as far as we know, there are no magnet particles in the ink used in photocopying machines. According to Wikipedia, toner is a powder mixture used in laser printers and photocopiers to form the printed text and images on the paper, in general through a toner cartridge. The cartridge is the container holding a spool of photographic film, a quantity of ink, etc. Mostly granulated plastic, early toner mixtures only added carbon powder and iron oxide, however mixtures have since been developed containing polypropylene, fumed silica, and various minerals for triboelectrification.

      The specific polymer used for the toner mixture varies by manufacturer but can be a styrene acrylate copolymer, a polyester resin, a styrene butadiene copolymer, or a few other special polymers. Toner formulations vary from manufacturer to manufacturer and even from machine to machine.

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