Final answer:
The duty factor, calculated as the pulse duration divided by the pulse repetition period, is 1 × 10⁻⁶ or 0.0001%, which is not listed among the provided options.
Step-by-step explanation:
To calculate the duty factor, which is the ratio of the pulse duration to the pulse repetition period, we use the formula: Duty Factor = Pulse Duration / Pulse Repetition Period. Here, the pulse duration is 1 microsecond (1 × 10-6 seconds) and the pulse repetition period is 1 second.
So, the duty factor is 1 × 10-6 / 1 = 1 × 10-6, which is equivalent to 0.000001 or 0.0001%.
Therefore, the correct answer is not listed among the options A to D provided in the question.