The New Encyclopaedia Britannica, Volume 16Encyclopaedia Britannica, 1974 - Encyclopedias and dictionaries |
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Page 520
... copper electrodes stamped from copper ribbon Silicon - controlled rectifier . In the forward direction with no gate current , the device acts like an open switch until an appropriate gate signal is applied to the gate terminal , at ...
... copper electrodes stamped from copper ribbon Silicon - controlled rectifier . In the forward direction with no gate current , the device acts like an open switch until an appropriate gate signal is applied to the gate terminal , at ...
Page 777
... copper , lead , and zinc ores . Low grade porphyry copper ores mined in Arizona assay about 0.6 percent copper and about 0.1 ounce of silver per ton of ore . In Canada , silver is found in the Canadian Shield around Sudbury , Ontario ...
... copper , lead , and zinc ores . Low grade porphyry copper ores mined in Arizona assay about 0.6 percent copper and about 0.1 ounce of silver per ton of ore . In Canada , silver is found in the Canadian Shield around Sudbury , Ontario ...
Page 1040
... copper - nickel and the nickel - iron in the ex- ample just described ) , then a voltage may indeed be de- veloped around the circuit , a thermoelectric voltage . It develops because the Fermi energy of different materials varies ...
... copper - nickel and the nickel - iron in the ex- ample just described ) , then a voltage may indeed be de- veloped around the circuit , a thermoelectric voltage . It develops because the Fermi energy of different materials varies ...
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