Find EMF of a battery in this circuit

[jdmaxwell02]

Homework Statement

In the circuit below R=53.0 Ω and assume both batteries have zero internal resistance and the voltmeter and ammeter are ideal. When the switch is open the voltmeter displays 14.2 V.



Find the emf e m f of the unknown battery: ___ V

If the switch is closed what does the ammeter display? ____ A

Relevant Equations

EMF-Ir=IR?

 

[phinds]

why did you stop where you did in simplifying the circuit?

EDIT: oh, wait ... I see now. You didn't simplify the circuit at all, you drew the two cases.

Simplify the circuit in each case and you can work it down to numerical answers.

 

[jdmaxwell02]

why did you stop where you did in simplifying the circuit?

EDIT: oh, wait ... I see now. You didn't simplify the circuit at all, you drew the two cases.

Simplify the circuit in each case and you can work it down to numerical answers.

The two batteries in parallel are kinda confusing me. How would I simplify that? Also, I got 98.9 for the equivalent Resistance. Does that seem correct?

 

[cnh1995]

The two batteries in parallel are kinda confusing me. How would I simplify that?

First, draw the circuit when the switch is open. With that information, can you find the unknown emf using KVL?