Finding battery emf from current and resistance values

[Jabababa]

Homework Statement

What is the emf of the battery shown?

there is an external resistance of 2.50 ohm and 4.0 A...The battery has an internal resistance of 0.50ohm

Homework Equations

V=Ir
V= E +/- IR

The Attempt at a Solution

Since the current is going away the battery then i use the equation V= E - Ir
To find the V of the whole battery V= IR, V=(4)(2.5) = 10V
E= V + Ir
E= 10 + (4)(0.5) = 12 V

please check see if its right. If I am not clear i can upload a picture.

 

[PeterO]

Homework Statement

What is the emf of the battery shown?

there is an external resistance of 2.50 ohm and 4.0 A...The battery has an internal resistance of 0.50ohm

Homework Equations

V=Ir
V= E +/- IR

The Attempt at a Solution

Since the current is going away the battery then i use the equation V= E - Ir
To find the V of the whole battery V= IR, V=(4)(2.5) = 10V
E= V + Ir
E= 10 + (4)(0.5) = 12 V

please check see if its right. If I am not clear i can upload a picture.

Again your logic appears good - unless the diagram is quite unusual.