This is then not a continuous currentlike we obtained from the chemical battery, but an alternating one, and you will see later on how it can be made to produce similar effects.
A continuous current is said to be + or positive where it leaves a battery, and - or negative where it returns; it will be convenient to use these signs and terms in the following explanation.
If it is required to have a continuous current, use must be made of what is termed a commutator, and I shall endeavour to explain the manner in which it acts as simply as possible.
In alternate current machines the electromotive force keeps constant, as the field- magnets are excited by a separate machine, giving a continuous current.
Pacinotti states that it occurred to him that the value of the apparatus would be greatly increased if it could be altered from an electro-magnetic to a magneto-electric machine, so as to produce a continuous current.
In order to further observe the approach to continuous current obtained by increasing the number of coils, the effect of a six coil armature is shown in fig.
It should be clearly understood at the outset that it is impossible to obtain a continuous current with a dynamo.
Pixii, who invented the split tube commutator for converting the alternating current so produced into a continuous current in the external circuit, was followed by J.
In some places a high voltage system of electric supply by continuous currentis adopted.
But since the armature yields a continuous current, it was early suggested (by J.
It may therefore be said that in almost all dynamos, whether they supply an alternating or a continuous current in the external circuit, the E.
At the plant or plants where the power transmitted by continuous current is received, a number of motors must be connected in series to operate at the high-line voltage.
If the alternating transmission uses no step-up transformers and delivers either alternating or continuous current by means of motor generators, its efficiency at full load is 83.
In Europe, on the other hand, continuous current is widely used on long transmissions at high voltages.
The surest to injure and destroy life, is a continuous current, but the most painful is an alternating current of very low frequency.
Such a condition exists in a continuous current motor; but in a synchronous motor, such as described, this condition is fulfilled only when the speed is normal.
Instead of closing the coil upon itself, its ends may be connected to two insulated sliding rings, and a continuous current supplied to these from a suitable generator.
The power distribution arrangements, it will be noticed, are very much simpler than with continuous current on the third-rail system.
In this way we get a continuous current of electricity in the two wires leading from the commutator, and can use it to light electric lamps or for other useful purposes.
Where porous cups are used, the batteries will give a continuous current for a very much longer time than without them, and will, sometimes, give many hours' work every day for several months without requiring any change of solution.
The present work is purposely confined tocontinuous current generators.
Rectified current is thus hardly described by the term continuous, but still it is "continuous current" in the sense that the flow is always in the same direction, and so it can be measured by the ordinary continuous current instruments.
The motor is of such a size that when supplied with a continuous current of proper strength the induced electrical effect in the shunt circuit will light one incandescent lamp.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "continuous current" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
