ELECTRICAL ENGINEERING IMPORTANT MCQ-BASIC ELECTRICAL PART THREE - All Exam Review

ANSWER KEY-Correct answer is indicated by symbol (V) in options. HINTS-In some questions options E-HINTS is indicating the hints of answer. 1) The equation for 25 cycles current sine wave having rms value of 30 amps, will beA ) 42.4sin50πt.B ) 30sin50πt.C ) 30sin25πt.D ) 42.4sin25πt.E ) HINTS-Imsinωt = Imsin2πft.,Im = √2 X 30 = 42.4 A ,f is here 25 Hz ,equation will be42.4sin2π25t = 42.4sin50πt. 2) The internal resistance of a practical voltage source is considered to be connected inA ) series.B ) parallel.C ) either parallel or series.D ) none