1338Electrical EngineeringMediumIn a certain low-pass filter, fc = 3.5 kHz. Its passband is________?A7 kHzB0 HzC3.5 kHzD0 Hz to 3.5 kHz Correct answerD. 0 Hz to 3.5 kHz ExplanationThe correct answer is 0 Hz to 3.5 kHz.