Tag

Electromagnetism

All articles tagged with #electromagnetism

innovation14 days ago•13 min saved

LEGO-powered motor reaches 4,000 RPM with minimalist parts

A YouTuber builds a fully working electric motor from LEGO bricks, magnets, a hand-wound copper coil, a sensor coil, a transistor, and a 9-volt battery. Without a microcontroller or complex electronics, a sensor coil detects rotor magnets and triggers timed power bursts to the driving coil, producing self-timed rotation. The project illustrates core electromagnetism and feedback control, with rotor configurations claimed to reach up to 4,000 rpm and varying speeds/torques that can drive a small LEGO car.

via Interesting Engineering|

#diy #education #electromagnetism

science6 months ago•1 min saved

Understanding the Magnetic Constant and Its Significance

The magnetic constant, also known as the permeability of free space, is a fundamental physics constant that determines the strength of magnetic fields and is essential in the functioning of devices like motors, generators, and speakers, playing a crucial role in electromagnetism and our understanding of magnetic phenomena.

via WIRED|

#constants-in-physics #electromagnetism #magnetic-constant

science1 year ago•2 min saved

Unprecedented Shift: Magnetic North Pole Drifts Toward Russia

Earth's magnetic north pole has been moving eastward at an accelerating pace, shifting from Canada towards Siberia due to changes in the flow of liquid metal in Earth's outer core. This movement, driven by the geodynamo system, has increased from 15 kilometers per year to 50-60 kilometers per year since the 1990s. While the shift has minimal immediate impact on daily life, it requires adjustments in navigation systems like GPS. Scientists are monitoring these changes, as Earth's magnetic poles have historically swapped positions every 300,000 years, though the last swap occurred 780,000 years ago.

via IFLScience|

#earth #electromagnetism #geodynamo