Part 3/8:
The speaker sets up a circuit with silicon diodes, visibly showing the schematic with the stripe on the left. When tested with the multimeter, silicon diodes read as 'good' or normal, displaying the expected voltage drop via the multimeter. To further confirm the diode's health, the voltage drop across a silicon diode is measured, typically around 0.6 volts, providing a reliable indicator of its condition.
However, germanium diodes behave differently. When tested under the same conditions, they tend to show a short circuit or very low reading, with the voltage drop around 0.4 volts, which matches the known properties of germanium junctions. These tests serve as practical methods to verify diode functionality before integrating them into larger circuits.