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matthewc

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## Homework Statement

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Hello, basically I have some tasks about calculating the reading of voltmeter and ammeter in a circuit, I can solve these with simpler circuits, where voltmeter is reading a few elements, but as in the ones below, I'm not sure where to begin and what to add into the calculations

In this example, would I have to calculate the total voltage of all elements and the current? as in:

Rtotal = R1 + R2 + R3 + R4

Utotal (Voltage) = U1 + U2 + U3

in order to get I = Vtotal/Rtotal which would then help with the voltmeter calculation using U = I * R?

and then what would the step after that be to get the voltmeter reading calculated?

Similarly here, except here we also have to apply kirchhoff law, from which side should I begin to calculate and why?

## Homework Equations

Rtotal = R1 + R2 + R3 + R4

Utotal = U1 + U2 + U3

I = V/R

U[voltmeter] = I * R

## The Attempt at a Solution

So I tried what I said above, calculating the total resistence, voltage and current but from there on I don't know what to use to get the voltmeter reading, which elements are relevant for it and if I include them all or only on certain branches (branches B and C in first image)

In second one, I would know how to calculate the reading of voltmeter through ohm law formulas, but I don't know which side to start off using kirchhoff law, I know that all current that enters must leave, so in the image 7A is leaving, 3A is entering, 2A is entering on the right side, that means 2A is coming from I assume where ammeter is?

If anyone could help me with these it'd be appreciated

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