A simple but effective device for demonstrating Lenz's Law using eddy currents induced in the wall of a copper tube by a falling magnet. The demonstrator consists of a 12" long copper tube and two apparently identical metal slugs with rubber end caps. One slug is plain steel and falls through the copper tube quickly. The other slug is a strong neodymium magnet that falls very slowly through the tube due to the braking effect of eddy currents. Includes activity guide.
View Activity Guide Preview
'%3e%3cpath%20d='M30%205.625C36.4647%205.625%2042.6645%208.19307%2047.2357%2012.7643C51.8069%2017.3355%2054.375%2023.5353%2054.375%2030C54.375%2036.4647%2051.8069%2042.6645%2047.2357%2047.2357C42.6645%2051.8069%2036.4647%2054.375%2030%2054.375C23.5353%2054.375%2017.3355%2051.8069%2012.7643%2047.2357C8.19307%2042.6645%205.625%2036.4647%205.625%2030C5.625%2023.5353%208.19307%2017.3355%2012.7643%2012.7643C17.3355%208.19307%2023.5353%205.625%2030%205.625ZM30%2060C37.9565%2060%2045.5871%2056.8393%2051.2132%2051.2132C56.8393%2045.5871%2060%2037.9565%2060%2030C60%2022.0435%2056.8393%2014.4129%2051.2132%208.7868C45.5871%203.16071%2037.9565%200%2030%200C22.0435%200%2014.4129%203.16071%208.7868%208.7868C3.16071%2014.4129%200%2022.0435%200%2030C0%2037.9565%203.16071%2045.5871%208.7868%2051.2132C14.4129%2056.8393%2022.0435%2060%2030%2060ZM43.2422%2024.4922C44.3438%2023.3906%2044.3438%2021.6094%2043.2422%2020.5195C42.1406%2019.4297%2040.3594%2019.418%2039.2695%2020.5195L26.2617%2033.5273L20.7539%2028.0195C19.6523%2026.918%2017.8711%2026.918%2016.7812%2028.0195C15.6914%2029.1211%2015.6797%2030.9023%2016.7812%2031.9922L24.2812%2039.4922C25.3828%2040.5938%2027.1641%2040.5938%2028.2539%2039.4922L43.2422%2024.4922Z'%20fill='%2300A046'/%3e%3ccircle%20cx='30.5'%20cy='29.5'%20r='20.5'%20fill='white'/%3e%3cpath%20d='M21.8175%2037H18.7395L13.5915%2029.206V37H10.5135V24.364H13.5915L18.7395%2032.194V24.364H21.8175V37ZM27.1266%2026.83V29.386H31.2486V31.762H27.1266V34.534H31.7886V37H24.0486V24.364H31.7886V26.83H27.1266ZM51.1749%2024.364L47.8809%2037H44.1549L42.1389%2028.684L40.0509%2037H36.3249L33.1209%2024.364H36.4149L38.2329%2033.562L40.4829%2024.364H43.8669L46.0269%2033.562L47.8629%2024.364H51.1749Z'%20fill='%2300A046'/%3e%3c/g%3e%3cdefs%3e%3cclipPath%20id='clip0_10639_3631'%3e%3crect%20width='60'%20height='60'%20fill='white'/%3e%3c/clipPath%3e%3c/defs%3e%3c/svg%3e)
