electrons released from hot filament thermionic emission – large (bulky) hot used lots of energy – diodes rectification – triodes amplifiers, switches – state devices - miniaturisation diodes (pn junctions) transistors (npn, pnp) IC - integrated circuits consume little power Superconductor zero resistance below critical temperature – Applications solid state devices – switching amplification Applications superconductors – power transmission magnetic levitation p3.52 p3.55
electrons released from hot filament – thermionic emission large (bulky) hot – used lots of energy diodes – rectification triodes – amplifiers, switches state devices - miniaturisation diodes (pn junctions) transistors (npn, pnp) IC - integrated circuits consume little power Superconductor – zero resistance below critical temperature Applications – solid state devices switching amplification Applications – superconductors power transmission magnetic levitation p3.52 p3.55
p7_ans.docx