You have already seen that if a magnetic needle be placed in the magnetic field of a magnet, its N pole will point in the direction in which the lines of force pass on their way from the N to the S pole of the magnet.
When a magnetic needle is placed in any magnetic field, its N pole points in the direction in which the lines of force are passing; that is, it points towards the S pole of the magnet producing the field.
A small bar magnet, supported upon a pivot, or suspended so that it may freely turn, is called a magnetic needle.
A piece of magnetic iron ore possessing polarity like a magnetic needle.
An instrument or apparatus for measuring the intensity of an electric current, usually by the deflection of a magnetic needle.
A magnetic needle is deflected when a current passes around it, as in instruments like the galvanometer.
We have seen that if a magnetic needle be placed in the field of a magnet, its N pole will point in the direction taken by the lines of force as they pass from the N to the S pole of the magnet.
In the regular compass, a magnetic needle is supported upon a pivot.
This experiment shows that an electric current, if parallel to a magnetic needle, and near it will deflect the north-seeking pole of the needle to the right or left depending upon the direction of the current flow.
The direction taken by a magnetic needle is parallel to the magnetic meridian.
A magnetic needle, the north pole N being attracted to the south pole of the bar magnet S, and repelled from the north end.
By a careful observation of the complex action of an electrified wire upon a magnetic needle, Dr.
Effect of an Electrical Current on a Magnetic Needle.
A differential galvanometer consists of a magnetic needlesurrounded by two separate coils of equal length and material carefully insulated from each other and wound in opposite directions.
Davy noticed, that when the electric current was passing through an aqueous solution it affected a magnetic needle[A], and Dr.
Above the disc is a glass plate on which is a small pivot supporting a magnetic needle N.
A number of sheets of paper are prepared, each containing a drawing of the motor frame and a magnetic needle in successively advancing angular positions, indicating resultant directions of the magnetism.
Faraday assumed that since the presence of a metal at rest stops the oscillations of a magnetic needle, the neighborhood of a magnet at rest ought to stop the motion of a rotating mass of metal.
It is well known that one pole of a magnetic needle points to the north and the other to the south.
As we move in a northerly direction a magnetic needle dips, and it was the observation of this phenomenon in different latitudes that finally resulted in the invention of the dipping needle.
A magnetic needleis only a slender permanent magnet suspended very delicately, and when not under local influence it points north and south on the magnetic axis.
As many of my hearers are aware, there are two ways of doing this: we can estimate either the push that an electric charge exerts on another similar charge, or else the pull that an electric current effects on a magnetic needle.
It is to this conduct on the part of a magnetic needle when in a "magnetic field" that we owe the existence of the needle telegraph instrument.
It became practicable, however, when Oersted discovered that a magnetic needle could be swung to one side or the other by an electric current passing near it.
These signs can be produced by the deviation of a magnetic needle, as Laplace pointed out, or by causing an electro-magnet to attract soft iron, or by chemical decomposition, or any other sensible effect of the current.
This can be proved by suspending a magnetic needle like a pithball, and approaching another towards it, as illustrated in figure 26, where the north pole N attracts the south S.
Brindley Acworth 498 Cawdray's "Treasurie of Similies," and Simile of Magnetic Needle, by Rev.
Query recalls two examples of the "magnetic needle simile" (Vol.
It is an advantage to have a magnetic needle that is always ready for use.
When a wire carrying a current of sufficient strength is properly brought near a magnetic needle, the latter will be deflected from its N and S line.
The conducting wire has a magnetic field while the current passes through it, and this gives the wire the power to act upon a magnetic needle just as another magnet would.
For some experiments in electricity a magnetic needle is required which has but little pointing-power; in fact, to detect the presence of very feeble currents by means of the needle, the less the pointing-power the better.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "magnetic needle" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
