Question

Seeking help understanding voltage, current, and resistance in circuits, and how to measure them in different scenarios.

Answer 1

Generally, in a circuit. In series connection, current is constant whereas in parallel connection, voltage is constant. So based on this you would connect you multimeter in series or in parallel with the circuit

Answer 2

When measuring voltage and current keep safety in mind at all times. In addition to your own safety, you must know how to handle your test equipment. Normally to measure current you would have to insert your meter in the circuit you wish to measure current. This may require you to open the circuit at a specific point, Turn off the the device when you open this circuit make your meter connections and return power for the measurement. Some meters have a pick up coil and you won't have to open a circuit, just place the pick-up over the wire in question.

When measuring resistance most meters will require that you remove power from the circuit under test. Also to get a resistance of a specific component you may have to remove one end of the component from the board or terminal.

It is impossible to describe the methods needed as this depends on the scenarios. But for sure when measuring High Voltage be careful and if you can get an observer do so.