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Updated: June 10, 2025
That is, if you multiply the resistance of the circuit in ohms by the current in amperes the result will give you the electromotive force in volts. From this you will see that if you know the value of any two of the constants you can find the value of the unknown constant by a simple arithmetical process.
He led the way to the other square room mentioned, and indicated the induction coil with which his researches were made, an ordinary Rhumkorff coil, with a spark of from four to six inches, charged by a current of twenty amperes. Two wires led from the coil, through an open door, into a smaller room on the right. In this room was a small table carrying a Crookes tube connected with the coil.
For the locomotive a four-wheel iron truck was used, and upon it was mounted one of the long "Z" type 110-volt Edison dynamos, with a capacity of 75 amperes, which was to be used as a motor. This machine was laid on its side, its armature being horizontal and located toward the front of the locomotive. We now quote from an article by Mr.
That is, by dividing the resistance of the circuit in ohms, by the electromotive force of the current you will get the amperes flowing in the circuit. Finally if you know what the resistance of the circuit is in ohms and the current is in amperes then you can find what the electromotive force is in volts since: Ohms x Amperes = Volts, or R x I = E
"Forty-five hundred amperes at twenty thousand volts," the elder Arcot said softly. "Where is it going?" "Take a look at the space within the right angle of the torus coils," said Arcot junior. "It's getting dark in there despite the powerful light shed by the ionized air."
The thing is that it must stop instantly. So we turn the whole business inside out. "Instead of making a terrific steady current and cutting it off, I'm going to start with it not flowing and use a strobe-light pack. Every amateur photographer has one. They give a current of eight hundred amperes and twenty-five hundred volts for the forty-thousandth of a second.
A thought, such as, for instance, the perception that two and two make four, is not long or broad, above or beneath; it cannot be measured or weighed in inches or pounds like matter, tested with the manometer, thermometer, or electrometer for its potential or intensity and tension, measured by ampères or volts or horse-powers like energies and electric currents; it is something wholly different, which can be known only through inner experience, but which is much better known than anything else whatever, and which it is absolutely impossible to compare with anything but itself.
Edison tackled the objection squarely and short-circuited his track with such a vehicle, but succeeded in getting only about two hundred amperes through the wheels, the low voltage and the insulating properties of the axle-grease being sufficient to account for such a result.
This tube is made like the amplifier tube described for use with the preceding experimental transmitter, but it is larger, has a more perfect vacuum, and will stand a plate potential of 350 volts while the plate current is .045 ampere. The filament takes a current of a little more than 2 amperes at 7.5 volts. A standard 4-tap base is used with it.
!Answers!: 55.06 cc.; 25%. What weight of metallic copper will be deposited from a cupric salt solution by a current of 1.5 amperes during a period of 45 minutes, assuming 100% current efficiency? !Answer!: 1.335 grams.
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