The period of this signal is about------ ms (milliseconds).The oscilloscope range selector determines the scale on the screen. That means number of volts per line for amplitude vertical (v/div) and the number of milliseconds per line for time horizontally (ms/div). **Oscilloscope Display and Controls Overview**The image shows a representation of an oscilloscope, a common instrument used in electronics for observing the change of an electrical signal over time. The oscilloscope screen displays a sine wave, which is a smooth, periodic oscillation indicative of an AC (alternating current) signal.### Display Screen:- **Waveform:** The screen shows a green sine wave. The horizontal grid lines represent time intervals, while the vertical grid lines represent voltage levels.- **Grid Divisions:** The screen is subdivided into squares that help measure the waveform’s amplitude and frequency.### Controls:- **V/div (Volts per Division):** A knob setting for vertical sensitivity, currently set to 1 volt per division. This controls the vertical scaling of the waveform.- **ms/div (Milliseconds per Division):** A knob setting for time base, currently set to 1 millisecond per division. This adjusts the horizontal scale, affecting how fast the waveform appears to move across the screen.### Connection Points:- **Input Terminals:** There are two input terminals (commonly black and red for ground and signal, respectively) where the test signal is connected for display on the oscilloscope.Understanding the functions of these controls is crucial for accurately interpreting and manipulating electronic signals for diagnostic and analysis purposes.

Given: The setting of time in the oscilloscope is at 1 ms/div. It means on the horizontal axis, 1 block or 1 cm will represent a time of 1 ms. The time-period of the waveform is indicated in the figure below:In the figure above, the time period of the waveform is T=2.1 cm or 2.1 divisions=2.1 div ×1 ms/div =2.1 ms. Answer: The period of the signal is about 1 ms.