In the circuit shown, a battery of negligible internal resistance is connected in series with a pair of fixed resistors 
and 
.
The circuit is to be used to test whether the electromotive force (e.m.f.) of a particular cell is 
. The cell is connected between terminals X and Y in parallel with and in series with a galvanometer. Which statement about the test is correct?
Any non-zero reading on the galvanometer means the cell has an e.m.f. of .
The battery does not need to have an e.m.f. of 
.
The cell may be connected either way round between X and Y.
The galvanometer does not need a scale calibrated in amperes.
