Cathode Ray tubes allow a manipulation of a stream of charged particles *CRT - consist of evacuated glass tube containing two electrodes *High voltage is applied across electrodes - stream of negatively charged particles from cathode to anode *Structures built around the cathode (e.g. electric plates and magnetic coils) can be used to manipulate CR Charge particles produce an electric field *Electric field exists in any region that an electrically charged object experiences a …showed first 75 words of 2659 total…

…showed last 75 words of 2659 total…in MRI (magnetic resonance imaging) and magnetic levitation trains (maglev) oElectronic devices "XMeasurement of electrical current, voltage and magnetic fields with unprecedented sensitivity "XSQUID (super conducting quantum interfacing devices) turn current off quickly - no need for transistors *Hence faster and smaller computers *Limitations oProblems with maintaining cold temps needed for superconductivity "XRequires liquid helium for coolant - expensive oHigh temp ceramics superconductors - hard to produce, brittle, and chemical unstable in some environments