17.1 17.2 17.3
... freely. How do magnetic poles interact? Any magnet, no matter what its size or shape, has two ends. Each one is called a magnetic pole. The magnetic effect of a magnet is strongest at the poles. A magnet always has a north pole and a south pole. Two unlike poles attract one another. Two like poles m ...
... freely. How do magnetic poles interact? Any magnet, no matter what its size or shape, has two ends. Each one is called a magnetic pole. The magnetic effect of a magnet is strongest at the poles. A magnet always has a north pole and a south pole. Two unlike poles attract one another. Two like poles m ...
Lesson 12. Topic “Magnetic effect of an electric current”. Grammar
... magnetism is greatly increased. It is not difficult to understand that the greater the number of turns of wire, the greater is the m.m.f. (that is the magnetomotive force) produced within the coil by any constant amount of current flowing through it. In addition, when doubling the current, we double ...
... magnetism is greatly increased. It is not difficult to understand that the greater the number of turns of wire, the greater is the m.m.f. (that is the magnetomotive force) produced within the coil by any constant amount of current flowing through it. In addition, when doubling the current, we double ...
At the origin of rocks: the secrets of paleomagnetism
... currents of iron, nickel and other lighter elements. These currents generate a magnetic field - the Earth's magnetic field which can be considered as a dipole. Simplifying, the Earth's magnetic field can be compared to that generated by a large magnet placed in the centre of the Earth, whose axis an ...
... currents of iron, nickel and other lighter elements. These currents generate a magnetic field - the Earth's magnetic field which can be considered as a dipole. Simplifying, the Earth's magnetic field can be compared to that generated by a large magnet placed in the centre of the Earth, whose axis an ...
Magnetic Activity
... Magnetic fields are generated by motions inside stars and greatly affect the movement and heating of the outer regions of stars ...
... Magnetic fields are generated by motions inside stars and greatly affect the movement and heating of the outer regions of stars ...
Exam - Skills Commons
... With an electromagnet: A. more current and more coil turns mean a stronger magnetic field B. less current and fewer coil turns mean a stronger magnetic field C. if there is no current in the coil, there is no magnetic field D. both A and C ...
... With an electromagnet: A. more current and more coil turns mean a stronger magnetic field B. less current and fewer coil turns mean a stronger magnetic field C. if there is no current in the coil, there is no magnetic field D. both A and C ...
Magnetic Anomalies and Calculating Spreading Rates
... 1. On each track on the back, mark points where the magnetic curve intersects the line of zero field strength. Start at the ridge and work outwards on both sides. These points are the points of reversals, when the magnetic pole switches from normal to reversed polarity or vice versa. Use a pencil! 2 ...
... 1. On each track on the back, mark points where the magnetic curve intersects the line of zero field strength. Start at the ridge and work outwards on both sides. These points are the points of reversals, when the magnetic pole switches from normal to reversed polarity or vice versa. Use a pencil! 2 ...
magnet
... The earth's magnetic field is just like the field of any magnet - only LARGER and STRONGER. A compass is simply another magnet. And the principles of attraction and repulsion govern the earth magnet and the compass magnet. The earth magnet is considered stationary. Therefore, the compass magnet's no ...
... The earth's magnetic field is just like the field of any magnet - only LARGER and STRONGER. A compass is simply another magnet. And the principles of attraction and repulsion govern the earth magnet and the compass magnet. The earth magnet is considered stationary. Therefore, the compass magnet's no ...
Discovery of Electromagnetism
... compass, which has a magnetic needle. As he expected, the needle of the compass didn’t move. It just kept pointing toward Earth’s north magnetic pole. After the demonstration, a curious student held the wire near the compass again, but in a different direction. To Oersted’s surprise, the needle of t ...
... compass, which has a magnetic needle. As he expected, the needle of the compass didn’t move. It just kept pointing toward Earth’s north magnetic pole. After the demonstration, a curious student held the wire near the compass again, but in a different direction. To Oersted’s surprise, the needle of t ...
what is Magnetism how it works
... ancient Greeks used a stone substance called “magnetite.” They discovered that the stone always pointed in the same direction. Later, stones of magnetite called “lodestones” were used in navigation. ...
... ancient Greeks used a stone substance called “magnetite.” They discovered that the stone always pointed in the same direction. Later, stones of magnetite called “lodestones” were used in navigation. ...
MAGNETIC MODEL FIELD
... Magnetic fields are a mathematical description of the magnetic effects that occur in a vector field. Magnetic fields are produced by permanent magnets, as well as by electric currents. The magnetic model field illustrates the direction that field lines have in magnetic fields, allowing the direction ...
... Magnetic fields are a mathematical description of the magnetic effects that occur in a vector field. Magnetic fields are produced by permanent magnets, as well as by electric currents. The magnetic model field illustrates the direction that field lines have in magnetic fields, allowing the direction ...
Full Chapter
... If a material is magnetic, it has the ability to exert forces on magnets or other magnetic materials nearby. A permanent magnet is a material that keeps its magnetic properties. ...
... If a material is magnetic, it has the ability to exert forces on magnets or other magnetic materials nearby. A permanent magnet is a material that keeps its magnetic properties. ...
Compass
A compass is an instrument used for navigation and orientation that shows direction relative to the geographic cardinal directions, or ""points"". Usually, a diagram called a compass rose, shows the directions north, south, east, and west as abbreviated initials marked on the compass. When the compass is used, the rose can be aligned with the corresponding geographic directions, so, for example, the ""N"" mark on the rose really points to the north. Frequently, in addition to the rose or sometimes instead of it, angle markings in degrees are shown on the compass. North corresponds to zero degrees, and the angles increase clockwise, so east is 90 degrees, south is 180, and west is 270. These numbers allow the compass to show azimuths or bearings, which are commonly stated in this notation.The magnetic compass was first invented as a device for divination as early as the Chinese Han Dynasty (since about 206 BC), and later adopted for navigation by the Song Dynasty Chinese during the 11th century. The use of a compass is recorded in Western Europe and in Persia around the early 13th century.