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metal
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Choose the best description of a magnetic field line AMagnetic field lines always point north BA magnetic field line shows the direction a compass needle would point CMagnetic field lines?
From that list, I'll have to go with 'B'.
What is the opposite of magnet?
We usually the term nonmagnetic (or possibly amagnetic) to mean not magnetic. That's the opposite of magnetic, and it means the thing described has no magnetic field impressed upon it, nor will it accept one if it is applied to that thing. Nonferrous and nonmagnetic tools, for example, are used on things that are highly sensitive to damage from magnetic fields. These tools not only are not magnetized, they cannot be magnetized. They won't be attracted to a magnet.
What causes the magnet compass to react with a magnet?
a compass works by detecting the earths magnetic field. a magnet also has amagnetic field just not as big so the compass needle points at the magnet ratherthan towards north.Another AnswerThe compass needle is a small bar magnet balanced on a pin. It swivels freely on this balance point. This is how it can align with the magnetic field of the Earth to show what direction magnetic north is. When you introduce another magnetic field, like from a magnet in close proximity, the needle will align with these local fields since their field strength is stronger than Earth's magnetic field - locally.
What is the difference between a song and a track?
In recording, the term "track" has multiple meanings, including:a. a band of recorded sound laid along the length of amagnetic tape.b. (on a longplaying phonograph record) one of a set of groovesin which sound has been recorded, separated from an adjacentset or sets by grooves without recorded sound.c. an individual song or segment of a recording: a title track.d. a discrete, separate recording that is combined with otherparts of a musical recording to produce the final auralversion: a special rhythm track added to the basic track.However, in common speech it usually refers to the third definition. While every track is a song, not all songs may be referred to as tracks. The term track refers to a type of recorded song, particularly its place in an album.
What is a earths magnetic field?
Earth's magnetic field(also known as thegeomagnetic field) is themagnetic fieldthat extends from theEarth'sinner coreto where it meets thesolar wind, a stream of energetic particles emanating from theSun. Its magnitude at the Earth's surface ranges from 25 to 65µT(0.25 to 0.65G). It is approximately the field of amagnetic dipoletilted at an angle of 11 degrees with respect to the rotational axis—as if there were a bar magnet placed at that angle at the center of the Earth. However, unlike the field of a bar magnet, Earth's field changes over time because it is generated by the motion of molten iron alloys in the Earth'souter core(thegeodynamo).TheMagnetic North Polewanders, but slowly enough that a simplecompassremains useful for navigation. At random intervals (averaging several hundred thousand years)the Earth's field reverses(the north and southgeomagnetic poleschange places with each other). These reversals leave a record in rocks that allowpaleomagnetiststo calculate past motions of continents and ocean floors as a result ofplate tectonics.The region above theionosphere, and extending several tens of thousands of kilometers intospace, is called themagnetosphere. This region protects the Earth fromcosmic raysthat would strip away the upper atmosphere, including the ozone layer that protects the earth from harmful ultraviolet radiation.
What is the purpose of the needle on the compass?
north pole of the earth is called south pole and the south pole of the earth is callednorth pole. the compass has amagnetic needle who's south pole points towards southpole ( actual north pole) & north pole points towards the north pole ( actual south pole ).=================================Answer #2 (an attempt to actually answer the question):The magnetic compass is used for the purpose of showing the direction towardthe Earth's magnetic poles from where the compass is located. This was the onlyindication of direction available throughout most of the history of human navigation,and is still commonly used for navigation and direction finding where extreme precisionand accuracy are not required.
How the generator and motor works ALTERNATING CURRENT GENERATORS BASIC AC GENERATORS Regardless of size all electrical generators whether dc or ac depend upon the principle of magneticinduction.?
An emf is induced in a coil as a result of (1) a coil cutting through a magnetic field, or (2) a magnetic field cutting through a coil. As long as there is relative motion between a conductor and amagnetic field, a voltage will be induced in the conductor. That part of a generator that produces the magnetic field is called the field. That part in which the voltage is induced is called the armature. Forrelative motion to take place between the conductor and the magnetic field, all generators must have two mechanical parts - a rotor and a stator. The ROTor is the part that ROTates; the STATor is the part that remains STATionary. In a dc generator, the armature is always the rotor. In alternators, the armature may be either the rotor or stator. ROTATING-ARMATURE ALTERNATORSThe rotating-armature alternator is similar in construction to the dc generator in that the armature rotates in a stationary magnetic field as shown in figure 3-1, view A. In the dc generator, the emf generated in the armature windings is converted from ac to dc by means of the commutator. In the alternator, the generated ac is brought to the load unchanged by means of slip rings. The rotating armature is found only in alternators of low power rating and generally is not used to supply electric power in large quantities.
