Chapter 1: Problem 14

Describe how you will remember the forward- and reverse-bias states of the \(p-n\) junction diode. That is, how will you remember which potential (positive or negative) is applied to which terminal?

Short Answer

Expert verified

To remember the bias states of a \(p-n\) junction diode, associate 'P' for 'Positive' with the \(p\)-type and 'N' for 'Negative' with the \(n\)-type in the forward bias. In reverse bias, swap these connections. Remember that current flows easily in forward bias and is prevented in reverse bias.

Step by step solution

Understand the P-N junction diode

The \(p-n\) junction diode consists of two sections: the \(p\)-type region and the \(n\)-type region. The \(p\)-type region contains an abundance of holes (positive charge carriers), while the \(n\)-type region contains an excess of electrons (negative charge carriers). A barrier forms at the junction between the \(p\) and \(n\) sections, creating the 'depletion region'.

Understand Forward Bias

In the forward bias state, the positive terminal of the battery is connected to the \(p\)-type semiconductor and the negative terminal is connected to the \(n\)-type semiconductor. This configuration reduces the barrier and allows current to flow.

Understand Reverse Bias

In the reverse bias state, the positive terminal of the battery is connected to the \(n\)-type semiconductor and the negative terminal is connected to the \(p\)-type semiconductor. This increases the barrier and reduces current flow.

Method to remember

A way to remember this is that 'P' for 'Positive' corresponds to the \(p\)-type and 'N' for 'Negative' to the \(n\)-type in the forward bias. In reverse bias, it is the opposite. It is also noteworthy that current flows easily in forward bias and is impeded in reverse bias.

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Describe how you will remember the forward- and reverse-bias states of the \(p-n\) junction diode. That is, how will you remember which potential (positive or negative) is applied to which terminal?

Short Answer

Step by step solution

Understand the P-N junction diode

Understand Forward Bias

Understand Reverse Bias

Method to remember

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