salt
bridge
Zn
Cu
anode
cathode
current
ZnSO4
CuSO4
E
<
ext 1 1V
e
-ve
+ve
I=0
Zn
Cu
ZnSO4
CuSO4
E
ext=
1 1V
When Eext < 1 1 V
(i) Electrons flow from Zn rod to
Cu rod hence current flows
from Cu to Zn