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1. Name a natural magnet. What are the disadvantages of using this magnet as compared to an artificial magnet?

2. How would you identify the poles of a magnet if they are not marked.

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How to Identify the North and South Poles of a Magnet You can purchase some magnets with the north and south poles indicated on them. However, some magnets may not have the poles marked, but there are a few tricks that you can use to identify what pole is which. Here is one method: Using a Compass... read more
How to Identify the North and South Poles of a Magnet You can purchase some magnets with the north and south poles indicated on them. However, some magnets may not have the poles marked, but there are a few tricks that you can use to identify what pole is which. Here is one method: Using a Compass to Identify Magnet North Pole Take a magnetic compass and place it close to but not touching your magnet. Watch carefully at where the compass needle points. The point that normally points to the north pole of Earth should point to one end of the magnet. That end is actually the South pole of the magnet. This rationale may seem a little confusing at first, but since Earth�s geographic North pole acts like the south pole to a magnet, the opposite poles attract. The compass method is one way to tell what pole is which, but you can feel free to contact us if you have questions about our magnet products or identifying polarity. read less
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And no 1 they don' t have much magnetic strength as compared to artificial magnets. And 2 they are in irregular shapes
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Take a magnetic compass.we know its north pole and south pole.now bring one end of a magnet to the north pole of magnetic compass ,if they repel each other , that is north pole.but if they attract .that is south pole
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disadvantage is less magnetic effect, poles are identify in such a way that same charge repel each other an d different charges attract each other.
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Best Engineering Graphics & Drawing and Machine DrawingTeacher, Mechanical Workshop Technology and Basics of Mechanical Engineering

Lodestone is one of the most efficient natural magnets.All natural magnets are permanent, although artificial magnets can be either permanent or temporary.Natural magnets are minerals or metals that generate a stable magnetic field without artificial inducement. You can identify poles with the help... read more
Lodestone is one of the most efficient natural magnets.All natural magnets are permanent, although artificial magnets can be either permanent or temporary.Natural magnets are minerals or metals that generate a stable magnetic field without artificial inducement. You can identify poles with the help of another marked magnet piece. read less
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Hang up the magnet by a cotton thread so that it hangs freely. When it comes to rest, we notice that the magnet is lying in a North - South direction.
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Computer Geek

Ans 1. Lodestone is a natural magnet which can attract Iron
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Ans 2.Suspend the bar magnet freely using a thread. The magnet will point in Geographical North South direction. The end pointing towards Geographical North is the North Pole of the magnet and the end pointing towards Geographical South is the South Pole of the magnet.
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Disadvantage of using bar magnet is that its strength decreases as time spends due to wear and tear.Also they are not found in fixed shape.
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Perstone is the natural magnet. Artificial magnet can be made stronger according to the requirement and it can be made in any shape
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