9. A 20 kHz pulse waveform consists of pulses that are 15 s wide. The duty cycle
A. cannot be determined
B. is 1%
C. is 30%
D. is 100%
9. A 20 kHz pulse waveform consists of pulses that are 15 s wide. The duty cycle
A. cannot be determined
B. is 1%
C. is 30%
D. is 100%