You can investigate voltage across cells and lamps in a series and parallel circuit by connecting the following circuits. Put one voltmeter in position V 1 and record the reading in a suitable table.

Here's an example of a circuit with resistors in both series and parallel formations. Say you have a 20-volt battery, immediately followed by a resistor of 10 Ohms.

The voltmeter is connected in parallel with the component. The supply voltage is shared between components in a series circuit, so the sum of the voltages across all of the components in a series ...

Build Your Own Arduino Voltmeter Circuit and Voltage Divider Which Can Measure Voltages From 0V to 30V, Including 12V. ... 16×2 Parallel LCD ( Hitachi HD44780 driver compatible) How to make an Arduino ...

The 4200B is an RMS voltmeter and is selective because it has a tuned circuit to adjust to a particular frequency. The unit uses discrete components and has an analog meter along with an LCD counter.