MDCAT Physics MCQ #1242

MDCAT Physics MCQ #1242

1. Question 1

   Q1. The potential barrier across a PN junction is

   • A) 0.3 V for Ge and 0.7 V for Si
   • B) 0.7 V for Ge and 0.3 V for Si
   • C) same for Ge and Si
   • D) zero for both Ge and Si

   Answer: 0.3 V for Ge and 0.7 V for Si

   Explanation: Potential barrier is 0.3 V for Ge and 0.7 V for Si due to different material properties.