What is electromotive force of a cell?

In S.I. system, unit of electromotive force of a cell is

An electric cell does 5 J of work in carrying 10 C charge around a closed circuit. The electromotive force of the cell is _____.

Explain electromotive force.

Al|Al_(0.5 M)^(+3)|| Cd_(0.02M)^(+2)| What will be the electromotive force of this cell at 25^(@)C E_(Cd^(+2)//Cd)^(@) =-0.40 V, E_(Al//Al^(+3))^(@) =+1.66 V

A cell is prepared by dipping copper rod in 1 M copper sulphate solution and zinc rod in 1 M zinc sulphate solution. The standard reduction potential of copper and zin c are 0.34 V and - 0.76 V respectively. (i) What will be the cell reaction ? (ii) What will be the standard electromotive force of the cell ? (iii) Which electrode will be positive ?

There is a definite potential difference between the two ends of a potentiometer. Two cells are connected in such a way that first time help each other, and second time they oppose each other. They are balanced on the potentiometer wire at 120cm and 60cm length respectively. compare the electromotive force of the cells. potentiometer wire at 120cm and 60cm length respectively. Compare the electromotive force of the cells.

Unit of electromotive force is