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byyao
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i got it already, thanks
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byyao said:An ordinary bar magnet has a magnetic moment. You place it in an external magnetic field.
Does the bar magnet precess?
I think it does precess...but i don't know why :(
can anyone help? please~~~
A magnetic field is an invisible force that surrounds a magnet or a moving electric charge. It is created by the motion of electrons, which are tiny negatively charged particles, within atoms and molecules. When these electrons move, they create a magnetic field.
A magnetic field has both direction and strength. The direction of a magnetic field is determined by the north and south poles of a magnet. The strength of a magnetic field is measured in units called teslas (T) or gauss (G) and can vary in different locations within the field.
There are several ways to detect a magnetic field. One way is by using a compass, which is a simple magnet that aligns with the Earth's magnetic field. Another way is by using a magnetometer, which is a device that measures the strength and direction of a magnetic field.
Magnetic fields have many practical applications, including in motors, generators, and transformers. They are also used in medical imaging technologies such as MRI machines, as well as in compasses, speakers, and credit cards with magnetic strips.
In most cases, magnetic fields are not harmful to humans. However, exposure to extremely strong magnetic fields, such as those found in MRI machines, can cause dizziness, nausea, and other health effects. Additionally, long-term exposure to high levels of magnetic fields may have negative effects on health, but more research is needed to fully understand the potential risks.