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Bringing the north poles of two bar magnets close together causes the magnets to repel each other. Scattering iron filings on paper placed over the magnets shows a pattern of lines of force diverging between the two north poles. Bringing a north and south pole together causes the magnets to be attracted to each other, and iron filings show a pattern of lines of force converging between the opposite poles.
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the ppt includes diagrams for almost everything for better visual understanding.
hope you find it helpfull and elaborative.
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Medan magnet dari aliran listrik
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materi tentang medan magnet pada arus listrik. versi english.
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Weber's theory of magnetism from 1852 proposes that all molecules in magnetic substances are themselves tiny magnets with a north and south pole. In an unmagnetized state, these molecular magnets are randomly arranged. Magnetization occurs when an external magnetic field aligns the majority of the molecular magnets, with their north poles pointing in one direction and south poles in the other, giving the substance its overall magnetic properties. The theory explains magnetic behavior in terms of thermal motion disrupting the alignment of molecular magnets at higher temperatures.
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The document discusses several laws and concepts related to magnetism. It states that like poles of magnets repel each other, while unlike poles attract. A compass arrow points to magnetic north. Induced magnetism explains how magnetic materials can become magnetized when placed near a magnet due to magnetic induction. A magnetic field is the region around a magnet where its magnetic effects can be detected, with field lines running from the north to south pole. Permanent magnets made of steel retain their magnetism while temporary magnets made of iron lose theirs over time.
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The document discusses concepts related to magnets including:
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Medan magnet dari aliran listrik
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3. Key properties of magnets such as their attraction/repulsion behavior and the representation of magnetic field lines. Magnetic fields are produced not just by magnets but also by any moving electric charge
Interactive textbook ch. 18 sec 1 magnets & magnetism
Magnets have two poles, north and south, and exert magnetic forces on each other and other objects. Earth itself acts like a giant magnet, with its magnetic north pole located near its geographic south pole. Materials are magnetic if their atomic domains are aligned, allowing their magnetic fields to combine. There are different types of magnets including permanent and electromagnets. Earth's rotation creates electric currents in its liquid outer core, generating the planet's magnetic field.
Magnetism
This document provides an overview of magnetism and magnetic fields. It discusses how magnets have been known for centuries and were used for navigation. It explains that all magnetic phenomena result from forces between electric charges in motion. It describes the properties of magnets including poles, magnetic fields, and how cutting a magnet produces two magnets. The document also discusses how the Earth itself acts as a magnet and how compasses use the Earth's magnetic field.
Electromagnetism
The document discusses magnetism and magnets. It begins by explaining that the ancient Greeks and Romans knew that the mineral lodestone was magnetic and could attract iron. It then provides details on lodestone and other naturally magnetic materials called ferromagnets that strongly attract metals like iron. The document outlines the basic properties of magnets, including that they have north and south poles and opposite poles attract while like poles repel. It concludes by describing different types of magnets such as permanent, temporary, and electromagnets as well as their common shapes.
Magnetism Science Physics e Learning
This document discusses magnetism and magnetic fields. It describes testing magnets by bringing specimens near magnet poles to observe attraction or repulsion. Induced magnetism occurs when an unmagnetized material becomes a magnet when near a permanent magnet. The document also discusses the theory of magnet domains, methods of magnetization and demagnetization, and plotting magnetic field lines. It provides examples of magnetic field patterns for single and multiple magnets, including the neutral point between magnets with like poles facing. Finally, it compares the magnetic properties of iron and steel.
Magnetism 3243
This document provides an overview of key concepts about magnetism, including:
1) It defines 10 things that will be learned about magnetism, such as magnetic poles attracting and repelling, and magnetic fields being induced by changing electric currents.
2) It explains that magnetic fields are produced by moving electric charges, and discusses magnetic field lines and their properties.
3) It introduces different types of magnetic materials, including ferromagnetic materials like iron that strongly attract to magnetic fields, and diamagnetic and paramagnetic materials that are weakly affected by magnetic fields.
Power point magnetic force firman gilbert metta
The document discusses concepts related to magnets including:
- Metals like iron, nickel, and cobalt have strong magnetic properties. Steel contains iron and carbon, while stainless steel contains chromium and nickel to prevent rusting.
- Magnets are made of materials that can attract or repel each other, with most magnets made of steel or mixtures like alnico containing aluminum, nickel, and cobalt.
- There are three main types of magnets: horseshoe, rod, and bar magnets, which have different magnetic force strengths. Magnets have north and south poles that attract or repel depending on their orientation.
- Magnetic fields can be observed using iron filings or a compass, with the strongest force
MAGNETIC FIELDS-1.pptx
Magnetic fields were first discovered over 2000 years ago and used for navigation starting in 1000 AD. A magnetic field is a region of space where a magnetic force is experienced. Magnetic field lines represent the direction and strength of a magnetic field. Electric currents produce magnetic fields according to the right-hand rule. Charged particles experience a magnetic force when moving through a magnetic field according to another right-hand rule. Magnetic fields have many applications including mass spectrometers and cyclotrons.
1. magnetism
Grade 10 CAPS-aligned unit on magnetism, from magnetic domains to visual representation of magnetic fields. Includes the magnetosphere and aurora phenomenon.
Magnetism and electromagnetism
This document provides information about magnetism and electromagnetism. It discusses the poles of magnets, magnetic materials like iron, induced magnetism through magnetic induction, and how electromagnets can be created using coils of wire and electric current. Examples of applications that use electromagnets are also described, such as electric bells and circuit breakers. Magnetic fields and field lines are explained, including how they are produced by currents and plotted using compasses.
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Interactive textbook ch. 18 sec 1 magnets & magnetism
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Friction occurs between two surfaces when they are moved against each other due to the roughness of the surfaces at a microscopic level, even if they appear smooth. This roughness requires a force to overcome as the bumps and hollows of each surface interact while moving past one another. Friction exists between solids, liquids, and gases, with different types including air resistance when an object moves through air and drag when an object moves through a liquid like water.
1
Friction is a resistive force that acts to slow moving objects down and tries to stop them from sliding past each other. It always acts in the opposite direction of an object's movement and is what causes things to slow down or stop when in motion. Friction exists between surfaces in contact with each other and generates heat as it transfers motion into thermal energy while impeding further sliding or rolling.
3
A boy walked at an average speed of 3.6 km/h and the question asks how far he will travel in 30 minutes. To calculate this, his speed of 3.6 km/h is multiplied by the time in hours (30 minutes is 0.5 hours) to get a distance of 1.8 km.
1
To calculate average speed, you need to know the total distance an object traveled and the total time it took to travel that distance. Average speed is calculated by dividing the total distance by the total time using the formula: Average Speed = Total Distance / Total Time. The units of distance and time determine the units for speed, such as meters per second, kilometers per hour, or miles per hour.
4
The boy needs to walk 200m to the church at an average speed of 0.8m/s. To calculate how long it would take, the document divides the distance (200m) by the speed (0.8m/s) which equals 250 seconds.
2
A girl traveled 10km around a cross-country ski course in 30 minutes. To calculate her average speed in km/h, take the distance traveled (10km) and divide it by the time taken (0.5 hours). This gives an average speed of 20km/h. To calculate average speed in m/s, first convert the distance to meters (10,000m) and time to seconds (3600s), then divide distance by time to get an average speed of 2.8m/s.
2
Unbalanced forces lead to a change in an object's speed or direction. The document discusses how if only one wind machine is blowing on a skater, or if the pull on one end of two hooks is greater than the other end, the forces are unbalanced and the skater or hooks will start to accelerate and move in the direction of the greater force. Unbalanced forces cause an object to change its speed or direction through acceleration.
1
Two wind machines apply equal but opposite forces to an ice skater, balancing each other out and preventing any movement of the skater. Similarly, when two newtonmeters are pulled equally from both ends, the recorded forces are the same because they balance each other out, causing no movement of the central hooks. Balanced forces that are equal in magnitude but opposite in direction cancel each other out.
4
If the forces on an object are balanced, the object will remain at the same speed and in the same direction. If the forces are unbalanced, the object will experience a change in either its speed (acceleration) or direction of motion. The document provides three examples of calculating the resultant force on different objects based on the balanced and unbalanced forces acting upon them.
3
Forces acting on an object can be added together to calculate the resultant force. The resultant force is found by adding the magnitudes of all the individual forces while accounting for their directions. This single resultant force then determines the overall motion of the object.
1
Forces can be measured using a force meter, which contains a spring connected to a metal hook. When a force is applied to the hook, the spring stretches, with larger forces causing greater stretching and higher readings. The unit of force is the newton (N), so 100 N represents a larger force than 5 N.
2
Forces acting on objects can be represented using force diagrams. A force diagram uses labeled arrows, with the direction of each arrow indicating the direction of a force and the length proportional to its magnitude. Forces include weight, thrust, upthrust, friction, air resistance, and for a falling ball initially, weight and air resistance are the key forces shown in its force diagram.
1
This document discusses different types of forces, including gravity and magnetism which can act over distances without direct contact, as well as friction and upthrust which require direct contact between objects. It notes that all forces involve interactions between objects and that all types of forces can occur whether objects are moving or still.
2
This document describes a method for identifying dyes in a mixture. Dots of single dyes are placed alongside a dot of an unknown mixture on paper. The solvent washes up the paper, allowing the pattern of dyes in the mixture to be compared with the single dyes to determine which dyes the mixture contains.
1
Chromatography is a technique used to separate mixtures of colored or non-colored substances that are soluble in the same solvent. It involves placing a spot of the mixture on filter paper and using one of two methods - either soaking the paper with solvent or slowly dripping solvent onto the paper - to separate the substances as the solvent travels up the paper.
1
The Earth contains an estimated 1,380 million km3 of total water, however only 3% of this is fresh water while the remaining 97% is saltwater that forms the seas and oceans.
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Desalination is a process that makes freshwater from seawater by removing salt. It is used in some countries that do not receive enough rainwater. The simplest method of desalination is through distillation, which boils the seawater and collects the vapor, leaving the salt behind to produce freshwater.
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Water is treated to make it safe for drinking by a system where water from a reservoir has chemicals added to combine with dirt and form a precipitate, the water then settles in a settlement tank before passing through filter beds. Chlorine is added before the water is supplied to homes, offices and factories.
1
Distillation is the technique used to separate a liquid from a mixture, involving three steps - evaporation of the liquid into a gas when heated, condensation of the gas back into a liquid in a condenser, and collection of the purified liquid.
2
The document discusses the process of separating salt from the waters of the Dead Sea. The Dead Sea, located between Jordan and Israel, contains some of the saltiest water in the world at almost six times more salty than the ocean. Nothing can live in the Dead Sea due to its high salt content, which is why it is referred to as the "dead" sea. The heat of the sun evaporates the water from the Dead Sea, leaving behind salt deposits that can be collected from salt beds along its shores.
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- 1. Viewing magnetic fields: N poles together Bring the north poles of two bar magnets together. What happens to the magnets?
- 2. Viewing magnetic fields: N poles together Bring the north poles of two bar magnets together. What happens to the magnets? Next, bring the two north poles as close to each other as possible and place a piece of paper on top of the magnets. 1. Carefully scatter iron filings onto the paper. 2. Draw the pattern created by the iron filings.
- 3. Magnetic field pattern: N poles together What do you notice about the pattern of the lines of force in the region between the two north poles?
- 4. Viewing magnetic fields: N and S poles together Bring the north and south poles of two bar magnets together. What happens to the magnets?
- 5. Viewing magnetic fields: N and S poles together Bring the north and south poles of two bar magnets together. What happens to the magnets? Next, put the north and south poles close to each other, without letting them touch, and place a piece of paper on top. 1. Carefully scatter iron filings onto the paper. 2. Draw the pattern created by the iron filings.
- 6. Magnetic field pattern: N and S poles together What do you notice about the pattern of the lines of force in the region between the north and south poles? How does this pattern compare with the pattern between the two north poles?