The Theory And Practice of Absolute Measurements in Electricity And Magnetism 2
The Theory And Practice of Absolute Measurements in Electricity And Magnetism 2
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In our eReader you can find the full English version of the book. Read The Theory And Practice of Absolute Measurements in Electricity And Magnetism 2 Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Theory And Practice of Absolute Measurements in Electricity And Magnetism 2
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To quickly assess the difficulty of the text, read a short excerpt:
The observer himself damped the vibrations of the needle by exciting temporarily at proper times a current in a coil for the purpose.
The induction throw was taken without waiting for the needle to come perfectly to rest, or arranging for perfect balance for steady currents. The amplitude of free swing was obtained by observing two successive elongations with the needle fairly quiet. Then the battery current was reversed as the needle passed through the position of equilibrium, and it was noted... whether the induction throw was with or against the direction of free motion, and the four elongations after reversal were observed.
After reversal the zero for steady flow had of course shifted owing to imperfect balance, but the change gave a means of correcting the induction throw. Let a be double the true arc of deflection due to induction, a^ the range of vibration from side to side just before reversal, and b the arc through which the zero had shifted, then at the moment after reversal the velocity which the needle had in consequence of free swing was numerically TTflo/T, in consequence of induction Tra/T, and the displacement from the new zero was b.
What to read after The Theory And Practice of Absolute Measurements in Electricity And Magnetism 2?
You can find similar books in the "Read Also" column, or choose other free books by Gray, Andrew, 1847-1925 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The observer himself damped the vibrations of the needle by exciting temporarily at proper times a current in a coil for the purpose.
The induction throw was taken without waiting for the needle to come perfectly to rest, or arranging for perfect balance for steady currents. The amplitude of free swing was obtained by observing two successive elongations with the needle fairly quiet. Then the battery current was reversed as the needle passed through the position of equilibrium, and it was noted... whether the induction throw was with or against the direction of free motion, and the four elongations after reversal were observed.
After reversal the zero for steady flow had of course shifted owing to imperfect balance, but the change gave a means of correcting the induction throw. Let a be double the true arc of deflection due to induction, a^ the range of vibration from side to side just before reversal, and b the arc through which the zero had shifted, then at the moment after reversal the velocity which the needle had in consequence of free swing was numerically TTflo/T, in consequence of induction Tra/T, and the displacement from the new zero was b.
What to read after The Theory And Practice of Absolute Measurements in Electricity And Magnetism 2?
You can find similar books in the "Read Also" column, or choose other free books by Gray, Andrew, 1847-1925 to read onlineMoreLess
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