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Current through a circuit, like a flashlight, and current through a wire? So that's DC and AC. Magnets can interfere with the electromagnetic field, right. 67.165.185.178 ( talk) 05:27, 29 November 2021 (UTC).
Okay here's an answer I got from a retired electrical engineer: for dc motors, the magnetic flux lines have to intersect a coil of wire at the correct angle at a certain rate of speed, while alternating north and south poles to excite electrons in the wire coil to create measurable current flow. a motor just reverses the process. ac motors are a little different. alternating current is always rising and falling the magnet would have to be synchronized in reversing poles to affect the ac motor. 67.165.185.178 ( talk) 05:53, 30 November 2021 (UTC).
@ Sagittarian Milky Way: Here is what the retired electrical engineer responded to your question to PiusImpavidus: hall effect devices are simply a magnetic switch in a solid state form. essentially an electronic reed switch. it's a make or break device. not capable of making current or voltage, merely to control it. can use it to control a circuit such as a servo feedback sensor or like in a car engine for crankshaft position sensor. 67.165.185.178 ( talk) 19:06, 1 December 2021 (UTC).
Science desk | ||
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< November 28 | << Oct | November | Dec >> | November 30 > |
Welcome to the Wikipedia Science Reference Desk Archives |
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The page you are currently viewing is a transcluded archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
Current through a circuit, like a flashlight, and current through a wire? So that's DC and AC. Magnets can interfere with the electromagnetic field, right. 67.165.185.178 ( talk) 05:27, 29 November 2021 (UTC).
Okay here's an answer I got from a retired electrical engineer: for dc motors, the magnetic flux lines have to intersect a coil of wire at the correct angle at a certain rate of speed, while alternating north and south poles to excite electrons in the wire coil to create measurable current flow. a motor just reverses the process. ac motors are a little different. alternating current is always rising and falling the magnet would have to be synchronized in reversing poles to affect the ac motor. 67.165.185.178 ( talk) 05:53, 30 November 2021 (UTC).
@ Sagittarian Milky Way: Here is what the retired electrical engineer responded to your question to PiusImpavidus: hall effect devices are simply a magnetic switch in a solid state form. essentially an electronic reed switch. it's a make or break device. not capable of making current or voltage, merely to control it. can use it to control a circuit such as a servo feedback sensor or like in a car engine for crankshaft position sensor. 67.165.185.178 ( talk) 19:06, 1 December 2021 (UTC).