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The magnitude of potential barrier of ge...

The magnitude of potential barrier of germanium is about 0.3 V .
a What does it mean . , b . What is the value of potential barrier for silicon ?

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a . The depletion layer has the p.d = 0.3 eV . In order to pass current through the junction , a voltage `gt 0.3` V is required .
b. 0.7 V
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