Question

A potential barrier of 0.50V exists across a P-N junction. If the depletion region is $5.0 \times 10^{- 7}m$ wide, the intensity of the electric field in this region is

• A. $\mathbf{1.0 \times 1}\mathbf{0}^{\mathbf{6}}\mathbf{V/m}$
• B. $1.0 \times 10^{5}V/m$
• C. $2.0 \times 10^{5}V/m$
• D. $2.0 \times 10^{6}V/m$

Answer 1

Answer: (A)

$\mathbf{1.0 \times 1}\mathbf{0}^{\mathbf{6}}\mathbf{V/m}$

Answer 2

$E = \frac{V}{d} = \frac{0.50}{5 \times 10^{- 7}}$= 1 × 10⁶ V/m.