Question

Under what condition will a galvanic cell send no current into outer circuit

Answer 1

if the resistance of the outer circuit is very high or if the circuit is open then the galvanic cell won't send any current into the outer circuit.

Answer 2

$\huge\mathfrak\color{blue}{Answer}$

Electromotive Force (EMF) has been measured to be 1.100 V. A concentration of 1 M in an ideal solution is defined as the standard condition, and 1.100 V is thus the standard electromotive force, DEo, or standard cell potential for the Zn−Cu galvanic cell