A potential barrier of `0.7V` exists across a p-n junction If the depletion layer is `7.0xx10^(-7)m` thick, what is the intensity of the electric filed in this region? If an electron is approaching the p-n junction from the n-side with a speed `6.0xx10^(5)ms^(-1)`, determine the speed with which it enters the p-side of p-n junction.

Explanation

To solve the problem step by step, we will break it down into two parts: calculating the intensity of the electric field across the p-n junction and determining the speed of the electron as it enters the p-side of the junction.

### Step 1: Calculate the Intensity of the Electric Field

1. **Identify the given values:**
- Potential barrier (VB) = 0.7 V
- Thickness of the depletion layer (D) = \(7.0 \times 10^{-7} \, \text{m}\)

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