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Updated: May 6, 2025
Use hmmm sodium copper magnesium aluminium, iron and chromium. Got it?" "Yes, sir." He left, just as Devin returned with a large electrostatic voltmeter. "I'd like," said he, "to know how you know the voltage will range around eighty thousand." "K-ring excitation potential for mercury.
To do this you need only to use a voltmeter across the filament terminals instead of an ammeter in series with it; then regulate the voltage of the filament with a rheostat. The Operation of C. W. Telegraph Transmitters with Alternating Current With Two Oscillator Tubes. In other words these oscillations are sustained but as in the case of those of a single tube, their amplitude rises and falls.
If we had had a small buzzer, such as is sold for a song at every electrical store, to say nothing of a pocket voltmeter, we would have discovered in a moment that the reserve battery contained one dead cell, the resistance of which made the other cells useless. At Batavia we tested them out with an ordinary electric bell, discovering at once the dead cell.
Downstairs the masked master criminal had already attached a voltmeter to the wires he had installed, waiting. Just then could be heard the tinkle of Dodge's telephone and the old man rose to answer it. As he did so he placed his foot on the iron register, his hand taking the telephone and the receiver. At that instant came a powerful electric flash.
The relux plate, subject now to eddy currents, since there was no other path for the energy to take, began to heat up rapidly. "I'm going to close the switch into the coil now," said Arcot. "Watch the meters." A relay snapped, and instantly the ammeter jumped to read 4500 amperes. The voltmeter gave a slight kick, then remained steady.
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