Magnet
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Trisha Singla gave a presentation in class 6-A about how magnets can be used to find directions. A freely suspended bar magnet will always align itself with Earth's magnetic field, pointing north-south, which is the basis of the mariner's compass. The magnetic compass uses a magnetized needle inside a circular case marked with directions, allowing travelers to determine which way is north by seeing which end of the needle points that way.
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CH-FUN WITH MAGNET
According to Greek legend, magnetism was first discovered by a shepherd named Megnes in Megnesia, Greece. His iron stick and nails had become attracted to a magnetic rock, which was named magnetite after the shepherd or country. Magnets have two poles, a north pole and a south pole, which always exist in pairs and cannot be separated. A compass uses a magnetic needle that aligns in the north-south direction, with its red end pointing north.
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The document discusses magnets and magnetic materials. It defines a magnet as an object that attracts magnetic materials like iron, nickel, and cobalt. It describes how magnets were first discovered by an ancient Greek shepherd and outlines the different types of natural and artificial magnets. The document explains that magnets have north and south poles and that like poles repel while unlike poles attract. It also discusses how magnets are used in compasses to find directions and how to make your own magnet by rubbing an iron piece with a permanent magnet. Finally, it provides tips for properly storing bar and horseshoe magnets.
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This document discusses different types of magnets. It explains that natural magnets occur naturally without artificial means, while artificial magnets are substances that are given magnetic properties through artificial means like iron or cobalt. Magnetic substances are strongly attracted to magnets and can be converted into artificial magnets. The document also describes how a magnetic compass uses a magnet's poles to point toward geographic north and south, aiding in navigation.
compass.pptx
scholars to the ancient theory that the compass was invented in Italy in about the year I 300. The theory, it is true, has suffered certain modifications, and there is now no question of invention at that date.
The purpose of a compass is
to put it simply, the compass is a tool which points out directions, such as North, South, East and West. These are also known as the cardinal directions. In more detail, it's a magnetised piece of metal that will turn towards the Earth's magnetic north pole. The most common form is the pocket compass.
Compasses made it possible for explorers to sail far out into oceans and away from land—no matter what the weather was like. This led to more exploration, the discovery of new countries, and trade with other cultures.
M A G N E T I S M
1. The document summarizes an experiment on magnetism conducted with primary school students. It explores the properties of magnets and magnetic materials through hands-on activities and observations.
2. Key findings include that iron, steel, and nickel are magnetic, while the strength of magnetism depends on the type of magnet. Magnetic poles of unlike names attract, while like poles repel.
3. The earth itself behaves like a large magnet, with magnetic north and south poles that cause compasses to point north-south and align the direction of homemade compasses.
Magnetic-fields.ppt
Magnetic fields exist around magnets and allow them to exert forces on other magnets or ferrous objects without touching. An investigation using compasses or a Magnaprobe can map the magnetic field surrounding a magnet. The investigation should show evidence of the field through arrow drawings at various locations, not just connect the dots. William Gilbert conducted early investigations in the late 1500s/early 1600s and developed the idea that Earth itself acts as a giant magnet, with its north magnetic pole near our geographic south pole.
Compass survey part 1
This document provides information on compass surveying and the different types of compasses used. It describes the prismatic compass, which consists of a metal box containing a magnetic needle attached to a graduated ring that can be read through a prism. It also describes the surveyor's compass, which is similar but reads angles directly against the needle. When using a prismatic compass for surveying, it must be centered precisely over the station using a plumb bob and levelled so the graduated ring is horizontal. Compass surveying is used for preliminary surveys where speed is important, and it determines directions while a tape is used to measure distances.
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According to Greek legend, magnetism was first discovered by a shepherd named Megnes in Megnesia, Greece. His iron stick and nails had become attracted to a magnetic rock, which was named magnetite after the shepherd or country. Magnets have two poles, a north pole and a south pole, which always exist in pairs and cannot be separated. A compass uses a magnetic needle that aligns in the north-south direction, with its red end pointing north.
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The document discusses magnets and magnetic materials. It defines a magnet as an object that attracts magnetic materials like iron, nickel, and cobalt. It describes how magnets were first discovered by an ancient Greek shepherd and outlines the different types of natural and artificial magnets. The document explains that magnets have north and south poles and that like poles repel while unlike poles attract. It also discusses how magnets are used in compasses to find directions and how to make your own magnet by rubbing an iron piece with a permanent magnet. Finally, it provides tips for properly storing bar and horseshoe magnets.
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This document discusses different types of magnets. It explains that natural magnets occur naturally without artificial means, while artificial magnets are substances that are given magnetic properties through artificial means like iron or cobalt. Magnetic substances are strongly attracted to magnets and can be converted into artificial magnets. The document also describes how a magnetic compass uses a magnet's poles to point toward geographic north and south, aiding in navigation.
compass.pptx
scholars to the ancient theory that the compass was invented in Italy in about the year I 300. The theory, it is true, has suffered certain modifications, and there is now no question of invention at that date.
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to put it simply, the compass is a tool which points out directions, such as North, South, East and West. These are also known as the cardinal directions. In more detail, it's a magnetised piece of metal that will turn towards the Earth's magnetic north pole. The most common form is the pocket compass.
Compasses made it possible for explorers to sail far out into oceans and away from land—no matter what the weather was like. This led to more exploration, the discovery of new countries, and trade with other cultures.
M A G N E T I S M
1. The document summarizes an experiment on magnetism conducted with primary school students. It explores the properties of magnets and magnetic materials through hands-on activities and observations.
2. Key findings include that iron, steel, and nickel are magnetic, while the strength of magnetism depends on the type of magnet. Magnetic poles of unlike names attract, while like poles repel.
3. The earth itself behaves like a large magnet, with magnetic north and south poles that cause compasses to point north-south and align the direction of homemade compasses.
Magnetic-fields.ppt
Magnetic fields exist around magnets and allow them to exert forces on other magnets or ferrous objects without touching. An investigation using compasses or a Magnaprobe can map the magnetic field surrounding a magnet. The investigation should show evidence of the field through arrow drawings at various locations, not just connect the dots. William Gilbert conducted early investigations in the late 1500s/early 1600s and developed the idea that Earth itself acts as a giant magnet, with its north magnetic pole near our geographic south pole.
Compass survey part 1
This document provides information on compass surveying and the different types of compasses used. It describes the prismatic compass, which consists of a metal box containing a magnetic needle attached to a graduated ring that can be read through a prism. It also describes the surveyor's compass, which is similar but reads angles directly against the needle. When using a prismatic compass for surveying, it must be centered precisely over the station using a plumb bob and levelled so the graduated ring is horizontal. Compass surveying is used for preliminary surveys where speed is important, and it determines directions while a tape is used to measure distances.
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This document discusses different types of magnets including natural and artificial magnets. Natural magnets are obtained directly from nature while artificial magnets are prepared by humans using elements like iron, cobalt, or nickel. It also describes the general properties of magnets including that they have two poles (north and south poles) and opposite poles attract while like poles repel. Applications of magnetism are discussed such as maglev trains which use magnetic levitation to move fast without wheels touching rails. The document also explains how the Earth itself acts as a giant magnet and was discovered to have magnetic poles by William Gilbert, known as the "Father of Magnetism".
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This document discusses different types of magnets including natural and artificial magnets. It describes the general properties of magnets including that they have two poles, north and south, and that like poles repel while unlike poles attract. It provides examples of applications of magnetism including maglev trains which use magnetic levitation to move fast without wheels. It discusses early discoveries about magnetism including how William Gilbert observed the Earth acts like a large magnet. It also explains how a smartphone can function as a compass using its internal magnetometer.
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This document discusses different types of magnets including natural and artificial magnets. It describes the general properties of magnets including that they have two poles, north and south, and that like poles repel while unlike poles attract. It provides examples of applications of magnetism including maglev trains which use magnetic levitation to move fast without wheels. It discusses early discoveries about magnetism including how William Gilbert observed the Earth acts like a large magnet. It also explains how a smartphone can function as a compass using its internal magnetometer.
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- A magnet has two poles - a north pole and a south pole. Opposite poles attract and similar poles repel.
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Magnet
- 1. SCIENCE PRESENTATION NAME: TRISHA SINGLA CLASS: 6-A
- 2. FINDING DIRECTIONS WITH A MAGNET When a bar magnet is suspended freely, it always comes to rest in a north-south direction. This property is used in the construction of a mariner's compass. This is called as the directional property of a magnet. Magnets were used from early times to find the geographical directions.
- 3. MAGNETIC COMPASS The magnetic compass is a device that is used by travellers, sailors and navigators to find the direction. A magnetic compass consists of a fat circular case (or box) of aluminium or brass with a glass top. A small, light, magnetised needle is pivoted at its centre. The north pole of this needle is coloured. The base of the case (or box) is marked with directions. The north of the compass needle always points towards north. Therefore by observing the direction of the needle one can find out the desired direction.