Question

1. on the display, the horizontal axis represents

a frequency
b voltage
c phase
d time

Explanation:

In a typical oscilloscope - like display, the horizontal axis represents time. Time is the independent variable for observing how a signal (such as voltage) changes over a period. Frequency is related to the number of cycles per unit time and is not usually on the horizontal axis. Voltage is often on the vertical axis. Phase is a property related to the timing relationship between signals and is not the main quantity represented on the horizontal axis.

Answer:

d. time