Voltmeter must be connected in parallel
into the circuit.
Ammeter must be connected in series into
Analogy of circuit and hydraulic system with a pressured pipeline:
Volt: Similar to the water pressure in meters in the pipeline.
Current: Similar to the discharge in m3/s in the pipeline.
Resistance: Similar to the local energy loses in meters in the pipeline.
Energy losses through the wire or pipeline are ignored in these problems.