# Anyone know what the reading across voltmeter would be?

#### Curlywurly

Joined Mar 16, 2019
8

#### dl324

Joined Mar 30, 2015
9,547
Is this school work?

#### Curlywurly

Joined Mar 16, 2019
8
Yes, im struggling with understanding this homework question

#### dl324

Joined Mar 30, 2015
9,547
Thankfully I responded before someone helped you cheat.

What theories have you studied?

#### Curlywurly

Joined Mar 16, 2019
8
We are currently doing kirchoffs laws and superposition

#### dl324

Joined Mar 30, 2015
9,547
What do you need to use with multiple independent voltage sources?

#### Curlywurly

Joined Mar 16, 2019
8
Superposition. I found the voltage across the 4k resistor when I removed the 4v source and then did the opposite when I removed the 12v source. This gave me an answer of 8.8 volts and I am not sure where I have gone wrong

#### dl324

Joined Mar 30, 2015
9,547

#### Curlywurly

Joined Mar 16, 2019
8
Here it is

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#### dl324

Joined Mar 30, 2015
9,547
Might be simpler if you stop after calculating currents. Do the arithmetic on the currents to get the voltages.

#### Curlywurly

Joined Mar 16, 2019
8
So 2.4 - 08 = 1.6mA... but then what?

#### dl324

Joined Mar 30, 2015
9,547
So 2.4 - 08 = 1.6mA... but then what?
Same thing you did before, but be less sloppy with magnitudes and units.

Last edited:

#### dl324

Joined Mar 30, 2015
9,547
Your solution is incomplete: