What is the value of $e.m.f.$ a voltaic cell?

1. A voltaic cell is an electrochemical cell in which an electric current is generated from a spontaneous oxidation-reduction reaction.

2. A voltaic cell:

3. The concentration$1M$ in an ideal solution is defined as the standard condition, thus the standard $e.m.f.$ is $1.1Volts$ for $Zn-Cu$ voltaic cells.

Hence, the value of $e.m.f.$a voltaic cell is$1.1Volts$.