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After liquid helium is cut off, the temperature could rise up and reach temperature. Under these circumstances, the magnet can demagnetise

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12y ago

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Why liquid helium is used in body scanners?

The "body scanners" that use it are Magnetic Resonance Imaging, or MRI, machines. (The scanners at airports are akin to radar sets, and don't use liquid helium.) MRI machines contain a very large electromagnet. To keep the thing from requiring its own power plant, an MRI magnet is wound with superconducting wire - wire with, effectively, no resistance. Superconducting wire must be kept at the temperature of liquid helium if you want it to superconduct.


What is a apposit of magnet power?

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No.If you break the magnet, it is still a useful magnet.


How do they power a magnet train?

With magnets


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That's called a permanent magnet.


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Liquid helium is colder than anything else on the face of the Earth. They cool the magnets with helium so the wire they're made out of will superconduct - flow electricity with no resistance. The LHC's magnets use 1.5 million watts of power all tolled; imagine how much they would need if the wire had even a thousandth of an ohm per meter resistance!


Why is your Refrigerator magnet losing power?

because it is


How is a pencil case procted?

by the power of the magnet.


When you drop a magnet it loses some of its power to what object?

When a magnet is dropped, it loses some of its power to other magnetic materials in its surroundings. This can occur when the magnet aligns with the poles of another magnet or when it induces a magnetic field in a nearby object, causing it to become magnetized temporarily.


How helium power is in a hot air balloon?

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Why helium is used in laser?

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What happens to the power used when the time is shorter?

When the time is shorter, the power used remains the same. Power is calculated as the rate at which energy is consumed, so if the time taken to consume that energy is shortened, the power consumption will be higher during that shorter time period.