Current being passed through the wire of the solenoid causes the core to be more or less attracted against a restraining force of gravity or springs.
When this value is reached the current relay operates and opens the solenoid circuit, which reduces the magnetic pull and allows the solenoid plunger to drop back slightly.
A plunger of soft iron is suspended from a spring, and hangs within a solenoid of wire, which solenoid is in connection with the terminals of the dynamo.
In the first place, it seems to us quite difficult to transmit the motion of the solenoid to the axle, supposing the former to revolve within the armature.
The fixed and suspended coils of the dynamometer are respectively connected in series with the magnetizing solenoid and with a secondary wound upon the specimen.
For a thin endless solenoid the axial magnetic force is therefore 4[pi] times the current-turns per unit of length.
Consider such a solenoid of mean length l and N turns of wire.
A counterpoise was placed on the solenoid end of the balance beam to act against the attraction of the solenoid, the position of the counterpoise determining the length of the arc in the crucible.
This holds good also for a long straight solenoidprovided its length is large compared with its diameter.
Two finite solenoid circuits act on each other like two polar magnets, exhibiting actions of attraction or repulsion between their ends.
The solenoid was above the iron cylinder, the supporting rod of which passed through it as a core.
At once the attractive force of the solenoid on the iron cylinder was automatically reduced, and the falling of the latter caused the negative carbon to rise, starting an arc between it and the metal in the crucible.
Everything will occur, then, as if we caused the ten-bobbin solenoid to move instead of the brushes.
They can make any angle whatever with each other, so that by trial there maybe given the active solenoid the most suitable length.
Everything takes place as if the iron cylinder were suspended in a solenoid ten centimeters in length that was caused to rise and fall; with the difference that the weight of the cylinder exerts no action on the hand of the operator.
The solenoid is hung to one end of a beam, and its motion is resisted by a pendulum weight, by which the energy meters may be regulated like clocks to give standard measure.
The use of an equal number of turns in opposite directions on the movable solenoid causes the instrument to be uninfluenced by external magnetic forces.
Can you design a power supply that would achieve that field for that time in a solenoid having .
Such a low, parallel magnetic field would quite probably be found inside of a simple solenoid coil.
How do you get that inside a solenoidwithout an iron core?
The solenoid dropped to the floor from the broken small contrivance.
Tommy moved toward the great solenoid which lay askew upon its wrecked support.
He placed it under the solenoid of the catapult after Denham's design, with the springs and rings of metallic ammonium.
Jacaro and his little pals will try to get in here when they think we've got the big solenoid ready for use.
At once that would energize the solenoid and release all the tensed springs from their greater tension, for an attempt to reach a permanent equilibrium.
These rings were pivoted, too, so that an unbelievably intricate series of motions could be given to the solenoid within them all.
In other words, the strength of the pole of the solenoid varies as the product of the current and the number of turns, which is called the ampere-turns.
The amount the armature B is rotated will depend upon the relative effects of the pole of the solenoid and the permanent magnet G.
The number of magnetic lines passing through the solenoid depends also upon the kind of material composing the core of the solenoid, in addition to the number of turns and the value of the current in these turns.
The number of lines per unit area inside a solenoid with an air core can be multiplied several times by introducing a soft-iron core.
The strength of the pole of the solenoidwill depend upon the current in its winding and the number of times the current passes around the core, or the number of turns in the winding.
Now, it is not a question here of an open circuit, nor even of infinitely weak currents, since in the line we have a solenoid whose core must set in motion a whole system of connected pieces.
In other words, the sections of helices of the solenoid produce an accelerated motion of the projectile by acting successively on it, after a principle involved in the construction of electro-magnetic rock drills and dispatch tubes.
These solenoids, by means of a suitable mechanism, act in opposition, the currentsolenoid separating the carbons, and the potential difference solenoid bringing them closer together.
The strength of the magnetic field produced by the current may be increased by winding the conductor in the form of a helix or solenoid consisting of a number of turns.
The effect can be very greatly increased by providing the solenoid with a soft-iron core.
Among the apparatus designed for demonstration in lecture courses, we remarked a solenoid of Prof.
In this case there may be a soft-iron core in the helix, or the armature may assume the form of a solenoid core, there being no permanent core within the helix.
Over the brush-holders is mounted the solenoid S, which rests upon a forked column, c.
When lights are cut out, the dash-pot acts to retard the movement; but if the current is considerably increased the solenoid gets abnormally strong and the brushes are shifted instantly.
To balance the opposing forces, the weight of the moving parts, and the pull exerted by the solenoid upon the iron core, the weights W W may be used.
The adjustment is such that when the solenoid is traversed by the normal current it is just strong enough to balance the downward pull of the parts.
The electrical circuit-connections are substantially the same as indicated in the previous diagrams, the solenoid being in series with the circuit when the translating devices are in series, and in shunt when the devices are in multiple arc.
Another difference: The action of a closed solenoid on a closed current is null according to experiment and according to the two theories.
The action of a closed solenoid on an element of current is null.
Conversely, the passing of the current through the solenoid at the other end of the threaded rod moves the creeper in the other direction.
The solenoid winding is in series with the dynamo circuit and when the load is normal, the spring pull is just equal to the magnet pull, and the resistance of A and B are equal.
A decrease in external load is attended by a slight diminution in dynamo current, thesolenoid is weakened and the pull of the spring predominates.
With increase of external load, the pull of the solenoid is strengthened by a small increase in dynamo current passing through the winding.
A solenoid wire is a single straight wire, connected at each end with and wound closely around by another insulated wire, this forming a complete system, the electric currents returning into themselves.
With the solenoid the only sound in the telephones was the voices of the persons speaking.
Electricians claim that the solenoid effectually overcomes all induction, and this afternoon experiments were made for the purpose of proving that assertion.
It shows a little solenoid arrangement, with one end of the plunger attached to the diaphragm of a speaking or resonating chamber.
By connecting one of the coils, A, with the battery by means of the wires, the action of a helix or solenoid is shown.
In a true solenoidone of the terminals is passed back through the center of the coil.
By placing one end of the bar magnetized by the solenoid near the compass contained by the cabinet (Fig.
By inserting in the solenoid a knitting needle, or any bar of hardened or tempered steel, and sending a current through the coil, the steel will become permanently magnetized.
What is the character of the lines of force of a solenoid in which a current is flowing?
Similarly, in the magnetic circuit, the total number of magnetic lines produced by a given magnetizing solenoid depends on the magnetic pressure, the material composing the circuit, and its shape and size.
On what, besides the current strength, does the magnetizing power of a solenoid depend?
How may the magnetizing power of a solenoid be increased?
To demonstrate this fact experimentally, a solenoid is constructed as shown, so that it can be suspended by two pivots in the cups a and c.
Since a solenoidcarrying a current attracts and repels by its extremities the poles of a magnet, two such solenoids will attract and repel each other.
A solenoid has north and south poles, and in fact possesses all the properties of an ordinary permanent magnet, with the important difference that the magnetism is entirely under control.
How does the magnetic strength of a solenoid vary?
By inserting in the solenoid an iron core or round bar of soft iron.
In the upper figure, the air space or "air core" surrounded by the solenoid offers considerable resistance to the passage of magnetic lines, allowing only a small number to pass through.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "solenoid" in a variety of sentences. We hope that you will now be able to make sentences using this word.
