MCQ PracticeIn which of the following appUcations, direct current is absolutely essential ?Subject: Electrical EngineeringTopic: Rectifiers And ConvertersAIlluminationBElectrolysisCVariable speed operationDTractionCorrect 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