MCQ PracticeAn operational amplifier:Subject: Computer Science EngineeringTopic: Automation SystemAcan be used to subtract two or more signalsBcan be used to sum two or more signalsCuses the principle of feedbackDAll of the above E. None of the aboveCorrect Answer: DPractice 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