Question
Write down the difference between forward bias and reverse bias of $p-n$ junction diode.
✓
Answer
| Forward Bias | Reverse Bias |
| $p$ - type semiconductor of $p-n$ junction is connected to positive terminal and $n$ - type is connected with negative terminal of battery. Such a biasing is called forward biasing. | $p$ - type semiconductor of $p-n$ junction is connected to negative terminal and $n$ - type is connected with positive terminal of battery. Such a biasing is called reverse biasing. |
| In forward bias, the current is due to majority charge carriers. | In Reverse bias, the current is due to minority charge carriers. |
| Current obtained in forward bias is of the order of $m A$. | Current obtained in Reverse bias is of the order of $\mu A$. |
| When diode is connected in forward bias, width of its depletion layer and height of potential barrier reduces. | When diode is connected in reverse bias, width of its depletion layer and height of potential barrier increases. |
| Resistance is of the order of $10 \Omega$ to $100 \Omega$. | Resistance is of the order of $10 M \Omega$. |
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