yes
Yes.
This depends on whether the voltage is AC or DC but an oscilloscope is the tool of choice for seeing voltages and how they change with time.
Most true RMS voltmeters can measure the value of a ripple voltage on top of a DC supply, when you place it in AC mode. You can also place a small capacitor in series with a DC voltmeter and that would measure the ripple. The real way to do this, because ripple voltage is not sinusoidal, is to use an oscilloscope, particularly if you want the peak values.
A multimeter is the best tool for the job Set the voltage to 20 V. dc.
Like AC, DC can be at any voltage.
24volt dc
If the positive probe of the oscilloscope is connected to the negative terminal and the negative probe is connected to the positive terminal of a DC supply, the oscilloscope will display an inverted signal. This means that the voltage reading will be negative, effectively showing the opposite polarity of the actual DC voltage. The magnitude of the reading will remain the same, but the trace on the oscilloscope will appear flipped around the zero voltage line.
The simplest is a voltmeter; the best is an oscilloscope. All modern voltmeters have an AC/DC selector switch. When set to AC and measuring a DC source, the reading will be 0; when set to DC and measuring an AC source, the reading will be 0 or varying wildly. An oscilloscope will show you a flat line for a DC source, and a sinusoidal curve centered at 0 for an AC source.
A Cathode Ray Oscilloscope (CRO) can measure DC voltage because it converts the voltage signal into a visual representation on its screen. When a DC voltage is applied, the electron beam in the CRO is deflected vertically according to the voltage level, allowing the user to read the corresponding value on the vertical axis. By calibrating the vertical scale, the CRO can provide accurate DC voltage measurements. Additionally, the time base feature enables the display of DC signals over time, enhancing analysis.
from the wall it could be 115v ac, or in non American countries that use it 230v ac. internal voltages range from 12v dc, 5v dc, 3.3v dc.
We use the "MOTOR GENERATOR SET" to convert the DC power to AC power we use DC motor and ac generator in it. It is very efficient way to convert the DC power to AC power.
You can use a DC ammeter.