The new encyclopædia Britannica: in 30 volumes |
From inside the book
Results 1-3 of 65
Page 513
... ( called intrinsic semiconductor material , with a ratio of impurities of about one part in 1012 ) is poor and largely temperature dependent . The intentional addition of im- purities , typically to a concentration of one part in 106 , is ...
... ( called intrinsic semiconductor material , with a ratio of impurities of about one part in 1012 ) is poor and largely temperature dependent . The intentional addition of im- purities , typically to a concentration of one part in 106 , is ...
Page 525
... called donors ; here , electrical conduction is by negatively charged carriers and the materials are called n - type . On the other hand , indium ( In ) , an element in Group III , has only three electrons in its valence shell , which ...
... called donors ; here , electrical conduction is by negatively charged carriers and the materials are called n - type . On the other hand , indium ( In ) , an element in Group III , has only three electrons in its valence shell , which ...
Page 1040
... called a thermopile , can be used to produce higher voltages . Two chief uses are made of thermoelectric circuit volt- ages : ( 1 ) to measure temperature ; ( 2 ) to convert heat to electric power with no moving parts other than the ...
... called a thermopile , can be used to produce higher voltages . Two chief uses are made of thermoelectric circuit volt- ages : ( 1 ) to measure temperature ; ( 2 ) to convert heat to electric power with no moving parts other than the ...
Common terms and phrases
19th century Africa agriculture American ancient areas army became BIBLIOGRAPHY carpels carpets central centre Christian church communication culture Danish death Denmark dunes early east eastern economic endosperm established Europe European feet Finland fishes flowers forces French fruit genera genus German Iceland important industry Intelsat islands kilometres king land lizards major ment metres miles military Moscow nobility northern Norway organization ovary ovules party peasants percent period petals pitcher pitcher plant plants political population production reforms region reign religion religious republic ritual river Rugby Russian S.F.S.R. Rwanda sacred sacrifice saga sail saints salmoniform salt domes sand sandstones Santalales São Paulo Sarmatians satellite satire Saxifragales sepals ships shrubs social southern Soviet Union species Stalin stamens structure Sweden Swedish taxes territory tion trade traditional trans trees tropical Western