(https://lh7-us.googleusercontent.com/XlDq4g8Xgf_Ir6tTGpPraaXTuIMxZoejgAXJs5g7U3oaO2JBc2InazdAMtm8KWXApbuEQIbFqxwxViSPUShn1d1usNhX2JS5w6payqkLfQDwhpBEWw67l8GR8ox4aewZ9DKWsg1LNx2b8OL-3Rjb1PM)
Why will the voltage be 0?
If salt bridge is replaced by Pt metal then solutions of anode and cathode compartments will not get anions and cations to neutralize the solutions.
Reaction will stop immediately in the absence of salt bridge.and hence voltage will be zero.