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A battery has an EMP of 12v and an internal resistance of 2 ohms. Is the terminal-to-terminal potential difference greater than, less than, or equal to 12v if the current in the battery is from a) from the neg to pos. terminal b) from pos to neg terminal c) zero?

I realize that you loose potential in going from a neg. to pos. terminal.

so for:

a) +E -iR = 0

b) -E + iR = 0

c) they are equal.

im just a little foggy on why b is greater than 12V.

thanks in advance!