Terminal voltage and internal resistance

[dev-hud]

A battery labeled 12.0 V supplies 1.90 A to a 6.00 ohm resistor

A) what is the terminal voltage of the battery?

B) What is its internal resistance


V = 12.0
R = 6.00
I = 1.90

I think i am to use V = emf - IR for terminal voltage right? however i do not know how to get emf, and IR is current x resistance right? i got the equation off google and it didnt explain so i am assuming? i am stuck on both a and b

 

[Stonebridge]

12V is the emf.
emf - IR will give you the so called "lost" volts. That is the voltage "used up" on the internal resistance.

 

[nasu]

A battery labeled 12.0 V supplies 1.90 A to a 6.00 ohm resistor

A) what is the terminal voltage of the battery?

B) What is its internal resistance


V = 12.0
R = 6.00
I = 1.90

I think i am to use V = emf - IR for terminal voltage right? however i do not know how to get emf, and IR is current x resistance right? i got the equation off google and it didnt explain so i am assuming? i am stuck on both a and b

The 12 V is the emf. The battery is labeled with its emf.