AU - OXLADE,CHRIS TI - ELECTRICITY & MAGNETISM T2 - SCIENCE TOPICS SN - 0431076693 U1 - 537/OXL PY - 1999/// CY - OXFORD PB - HEINEMANN LIBRARY KW - ELECTRICITY KW - MAGNETISM KW - CONDUCTORS AND INSULATORS KW - MICROCHIPS KW - DIGITAL CIRCUITS ER -