1. Which one of the following triggering controls is used to select the positive

1. Which one of the following triggering controls is used to select the positive-going or negative-going edge of a signal for trace triggering?A. The level controlB. The slope controlC. The line controlD. The field control2. What is the duty cycle of a square wave that s positive for two horizontal divisions and at zero volts for four horizontal divisions?A. 25 percentB. 33 percentC. 45 percentD. 65 percent3. Which of the following scope probe connections should be used to make a measurement from an integrated circuit lead?A. An extender on the probeB. A point-type probe contactC. A direct probe connectionD. A needle-tip probe4. A sine wave signal takes 0.01 second to complete one cycle. What is the frequency of this signal?A. 60 HzB. 80 HzC. 100 HzD. 120 Hz