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Sentences for "conductor "
The orchestra conductor obviously has an intimate knowledge of Beethoven's greatest compositions.
The conductor appeared on the stage.
A conductor directs an orchestra.
[Footnote 3: The covering of the fibres by a sheath of phosphoretted fat serving to insulate the conductile portion of the nerve is an indication that the fibre has commenced to function as a conductor of nervous impulses.
(3) Magnetic, as when any conductor is in a changing magnetic field.
(3) When a conductor is moved in a magnetic field, the energy spent is measurable in foot-pounds, as before, a pressure into a distance.
But one is aware that the molecules of a conductor are practically in contact with each other, and that if one for any reason rotates, 112 the next one to it would, from frictional action, cause the one it touched to rotate in the opposite direction, whereas, the evidence goes to show that all rotation is in the same direction.
It appears that the cooler a body is the less electric resistance it has, and the indications are that at absolute zero there is no resistance; that is, impacts do not retard rotation, but it is also apparent that any current sent through a conductor at that temperature would at once heat it.
This is the same as saying that an electric current could not be sent through a conductor at absolute zero.
It is well known that a current in a conductor makes a magnet of the wire, and gives it an electro-magnetic field, so that other magnets in its neighbourhood are twisted in a way tending to set them at right angles to the wire.
The inevitable formation of a thin coat of oxide is unfavorable to the process of rapid cooling; and as rapid cooling seems to be the one thing necessary for success in hardness, any means used for the removal of a bad conductor of heat, like the black oxide, will be of advantage, and more especially if this means also results in the formation of a liquid film on the steel surface having the affinity for water which, it is well known, is peculiar to potassium cyanide.
A gas containing ions is said to be ionized; and it is the ionization of the atmosphere that makes it a conductor of electricity.
Thus between the earth and any point in the air (except, as we now know, at great altitudes) there is a difference of what is called “potential,” of such a character that negative electricity will follow any conductor provided for it away from the earth.
It has also been known for a good many years that the air is a conductor of electricity-though a145 poor one-and, therefore, does not insulate the earth.
The conductor will remain charged, as long as the tension does not exceed the resistance which the surroundings offer to the emission of electricity; as soon as this resistance becomes inferior to the tension, there will be emission of electricity.
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