The Principles of Radiography |
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absorption acid adjusted alternating current aluminium ammeter ampere-hours amperes anode anticathode apparatus atomic battery break capacity cathode rays cell condenser conductor connected consists convenient Coolidge tube copper plate couch current flows current is passed deflection diaphragm difference of potential direct current disc discharge distance earthed ebonite electrode electromotive force electroscope exactly exposure fluorescent screen focus foreign body give given glass gold leaf heat high tension hydrogen increased induced E.M.F. induction coil influence machine insulated intensity interruptor inverse current ions latter localisation magnetic measured mercury metal method milliamperes negative charge parallel placed pole positive charge potential difference pressure primary circuit primary current produced proportional quantity of electricity radiation radiogram radiography regulator resistance rheostat right angles rotating secondary circuit shadow sodium spark gap spiral stereoscope substance sufficient supply terminal thickness transformer vertical voltage voltmeter volts wave-length wire X-ray tube