3133Electrical EngineeringMediumCalculate the cutoff frequency of a first-order low-pass filter for R1 = 2.5kΩ and C1 = 0.05μF________?A12.73kHzB1.273kHzC127.3 kHzD127.3 Hz Correct answerB. 1.273kHz ExplanationThe correct answer is 1.273kHz.