MCQ PracticeWhich of the following detectors does not require a battery and is also known as barrier layer cell?Subject: Biotechnology EngineeringTopic: Analytical Tools In BiotechnologyAPhotomultiplier tubeBPhotovoltaic cellCPhotoemissive tubesDPhoto reflectorCorrect Answer: BPractice QuizBack to MCQsRelated MCQsCurrent flows in a circuit whenEighttenths coulomb passes a point in 4 s. The current in amperes isThe unit of electrical charge is the