Iron, cobalt and steel are ferromagnetic materials which can be used to make magnet but ebonite cannot be used to make magnets.

We use these names because if you hang a magnet from a thread, the magnet’s north pole points (almost) towards the north direction. This is because the Earth’s core (its centre) is a large, weak magnet. Your little, strong magnet lines up with Earth’s magnetic core, so it points north.১১ নভেম্বর, ২০১৮

A lodestone is a naturally magnetized piece of the mineral magnetite. The lightly magnetic property of this rock specimen is demonstrated by the included clinging iron filings. This stone contains iron ore, the earth’s only natural magnet.

neodymium

Most MRI scanners operate at a strength of 1.5 Tesla. A 3 Tesla MRI, however, operates at twice the normal strength, providing a greater signal-to-noise ratio, which is a major determinant in generating the highest quality image. The strength of a 3 Tesla MRI yields myriad benefits for radiologists and their patients.১২ সেপ্টেম্বর, ২০১৬

Summary: Prolonged exposure to low-level magnetic fields, similar to those emitted by such common household devices as blow dryers, electric blankets and razors, can damage brain cell DNA, according to researchers in the University of Washington’s Department of Bioengineering.১৯ ফেব, ২০০৪

The powerful magnets were banned in 2013, but the rules against using them in toys were lifted in 2016, leading to more emergency room visits.২৪ নভেম্বর, ২০২০

A federal judge overturned a 2012 ban on the sale of the toy, meaning it’s now legal to sell them in the U.S. again. If you’re not familiar with Buckyballs, also known as Zen Magnets and Neoballs, they’re small balls made of neodymium magnets.১ ডিসেম্বর, ২০১৬

Yes and No. Generally speaking, magnets below 3000 Gauss (magnetic field unit) are basically harmless to the human body, while magnets with magnetic field strength above 3000 Gauss are harmful to the human body. Some people are afraid that the magnetic field of the magnet will affect their health.

Magnets have no healing properties. Magnetic Resonance Imaging (MRI) employs very strong magnetic fields, far stronger than a household magnet can produce, and yet MRI’s have no direct effect on the health of the patient (an MRI may have an indirect effect as a diagnostic tool).২৬ মার্চ, ২০১৩

Researchers have shown that a mild magnetic field can cause the smallest blood vessels in the body to dilate or constrict, thus increasing the blood flow and suppressing inflammation, a critical factor in the healing process.৯ জানু, ২০০৮

If you put a magnetic field near your body, it’s believed things will go back to normal. Ions like calcium and potassium help your cells send signals. In tests, scientists have seen magnets change how these ions act.২৭ মে, ২০১৯

Laboratory studies suggest that electric and magnetic field exposure may affect heart rate and heart rate variability. Epidemiologic evidence indicates that depressed heart rate variability is associated with reduced survival from coronary heart disease as well as increased risk of developing coronary heart disease.

When a child swallows two or more magnets, the magnets can attract and meet each other within the child’s body, causing digestive tissue to be trapped between them. This cuts off blood supply to the stomach or intestines. These internal injuries can be life-threatening.২৪ জানু, ২০২০

Two physicists searching for a novel way to prevent heart attacks and strokes have discovered that strong magnetic fields can dramatically reduce the thickness, or viscosity, of blood flowing through a tube.৯ জুন, ২০১১