A new instrument of warfare in a physics lab: an electromagnetic ring catapult! We place an aluminium ring on the yoke of a coil -- turn on the (quite high) current, and due to electromagnetic induction the ring flies away! The liquid nitrogen serves only for the purpose of increasing the conductivity of the ring at lower temperatures.
2006/07 Physikshow of the University of Bonn.
http://www.physikshow.uni-bonn.de/
Erster . . . !
pk5573 1 year ago