thumb-and-finger rule
noun
: either of two statements in electromagnetism: when the fingers of the right hand are bent so that the thumb points in the direction of the decrease in flux in a magnetic circuit, the fingers will point in the direction of the induced voltage in the electric circuit linked with the magnetic circuit; and when the fingers of the right hand are bent so that they follow the direction of the flow of current through a helical or coil conductor, the thumb will point in the direction of the flux through the helix or coil compare left-hand rule, right-hand rule
Articles Related to thumb-and-finger rule
Dictionary Entries Near thumb-and-finger rule
Cite this Entry
“Thumb-and-finger rule.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thumb-and-finger%20rule. Accessed 28 Nov. 2024.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share