How Do You Calculate EMF in a Circuit with a Resistor?

[pat666]

Homework Statement

The question itself doesn't make sense to me, it says to find emf but the answer box has V=
?
problem is an attachment.

Homework Equations

I=e/(r+R)
Ir+IR=emf
P=VI

The Attempt at a Solution

If it wants voltage that's simple P=I^2R P=V^2/R V=54.8V if it wants emf I need some pointers ... Thanks for any help

 

[pat666]

Dont worry - - solved V is emf

 

[Phy.man]

Here emf is the voltage difference

 

[merryjman]

If a battery has no internal resistance, its EMF and its voltage are the same thing.