The vertical deflection of the CRT oscilloscope is proportional to the:

Explanation:

CRT Oscilloscope

Definition: A Cathode Ray Tube (CRT) oscilloscope is an electronic test instrument that allows observation of constantly varying signal voltages, usually as a two-dimensional plot of one or more signals as a function of time. The primary components of a CRT oscilloscope include the cathode ray tube, vertical and horizontal deflection systems, and the timebase.

Vertical Deflection in CRT Oscilloscopes: The vertical deflection of the electron beam in a CRT oscilloscope is a critical aspect of its operation. This deflection is controlled by the vertical deflection plates or coils, which are driven by the input signal. The degree of vertical deflection is a direct measure of the amplitude of the input signal.

Correct Option Analysis: The correct answer to the statement "The vertical deflection of the CRT oscilloscope is proportional to the:" is option 3) amplitude of the input signal. This is because:

• The vertical deflection system in a CRT oscilloscope is designed to move the electron beam up and down based on the voltage level of the input signal.
• The higher the amplitude of the input signal, the greater the voltage applied to the vertical deflection plates or coils, resulting in a larger vertical movement of the beam.
• This vertical movement creates a visual representation of the signal's amplitude on the oscilloscope screen.