9. What is the uncertainty of the measurement of a voltage measurement on the oscilloscope when the vertical scale is set to 2V / division, given that it uses an 8-bit D/A converter?

Accuracy of measurement = ± 0.19%

Explanation:

For a 8-bit D/A converter,

Accuracy of measurement = 1/2ⁿ = 1/2⁸ = 1/256 = 0.0039 = 0.39% or ± 0.19%

Given that vertical scale is set to 2V/division so the absolute value of the error is 2*0.0019 = ± 3.8 mV

Example:

In a digital oscilloscope, 1 volt/division means that each division on the oscilloscope shows exactly 1 volt, similarly, 0.5 V/division means that each division shows exactly 0.5 volt so 1 V will take 2 divisions hence the signal will appear larger (zoomed in) on the other hand, setting it on 2V/division will make the signal appear smaller (zoomed out).

Note: Volts/division doesn't change the amplitude of the signals, it only makes them appear zoomed in or out so that the required signal can fit on the oscilloscope screen.

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge