Q. A potential barrier of $0.50\ V$ 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) $1.0 \times 10^{6}V/m$
B) $1.0 \times 10^{5}V/m$
C) $2.0 \times 10^{5}V/m$
D) $2.0 \times 10^{6}V/m$
Explanation
(a) $E = \frac{V}{d} = \frac{0.5}{5 \times 10^{- 7}} = 10^{6}\ V/m$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.