Question
Identify the type of conductor in which the variation of current with potential difference may depend upon the sign of the potential difference applied.
✓
Answer
- p-n junction diode
p-n junction diode consists of p-type and n-type semiconductors. The V-I relationship is non-linear. When a voltage is applied across junction, very little current flows for the fairly high negative voltage and a current begins to flow for much smaller positive (forward) bias. The magnitude of variation depends upon the sign of potential difference applied across it.
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