The standard electrode potential of ${\mathrm{Ag}}^{+}/\mathrm{Ag}$ is   $0.08\mathrm{V}$ and ${\mathrm{Cu}}^{2+}/\mathrm{Cu}=0.34\mathrm{V}.$ . These electrodes are connected through a salt bridge and if  

Copper electrode acts as a cathode, then  $E_{\text{cell }}^{\circ }\text{ is }+0.46\mathrm{V}$

Silver electrode acts as anode, then  ${E_{cell}}^{\circ }$ is $+1.14\mathrm{V}$

Copper electrode acts as a cathode, then $E_{\text{cell }}^{\circ }$ is $+0.46\mathrm{V}$

Silver electrode acts as anode, then $E_{\text{cell }}^{\circ }\text{ is }-0.34\mathrm{V}$