(A) Specially designed LED
(B) A reverse biased pn-junction
(C) A p-n-p transistor
(D) A forward biased diode
»Important Links:
Online Test Preparation and Mcqs Website.
(A) Specially designed LED
(B) A reverse biased pn-junction
(C) A p-n-p transistor
(D) A forward biased diode