How Do You Calculate Current and Terminal Voltage in a Mixed Battery Circuit?

[qety6321]

Homework Statement

two batteries A and B are connected in pareallel. A has emf of 108V and internal resistance of 3 Ω while B has emf of 120V and internal resistance of 2Ω. The battery terminal is connected to battery C in series with a 25 resistor. Battery C has emf of 30V and negligible internal resistance.

Homework Equations

find the value and direction of current in each battery and terminal voltage of B.

The Attempt at a Solution

I'm struggling to find the current in each battery first and I have tried to find the terminal voltage of B by using Kirchhoff's law and nodes but cannot get the right answer.

 

[NascentOxygen]

Hi qety6321. http://img96.imageshack.us/img96/5725/red5e5etimes5e5e45e5e25.gif

Please attach your sketch of the circuit showing all the information given. Then show your calculations so we can see where you are going wrong.

 

[berkeman]

Homework Statement

two batteries A and B are connected in pareallel. A has emf of 108V and internal resistance of 3 Ω while B has emf of 120V and internal resistance of 2Ω. The battery terminal is connected to battery C in series with a 25 resistor. Battery C has emf of 30V and negligible internal resistance.

Homework Equations

find the value and direction of current in each battery and terminal voltage of B.

The Attempt at a Solution

I'm struggling to find the current in each battery first and I have tried to find the terminal voltage of B by using Kirchhoff's law and nodes but cannot get the right answer.

As a bonus question, calculate how long before one of the batteries catches fire...

 

[Chronum]

Try drawing the EMF ups and downs separately for the batteries. Something like a ----EMF---/\/\/---- diagram. Then use appropriate math.