Answer:
A) 3
B) 0
Explanation:
The volt/div selector is a scale factor, which means the input will be rescaled so we can visualize the input signal bigger or smaller.
if the volt/div is set to 5V/div that means that every division on the display represents 5 volts of the input signal.
The input signal is 15 Dc Volts so:
[tex]Ndiv=\frac{V}{V/div}\\where:\\Ndiv=divisions\\V=in\_volt\\V/div=Volt/Div\\\\Ndiv=\frac{15V}{5V/div}\\\\Ndiv=3[/tex]
If the oscilloscope is set to AC mode, the DC level is substracted, so it will only show the AC signal, in this case, there is only Dc level, so the oscilloscope will show a ground level signal (0 volts).
