When a copper half-cell is coupled with a standard hydrogen electrode,

electrons will flow from the hydrogen electrode to the copper electrode

electrons will flow toward the anode

the voltage measured between the two electrodes will be negative

the hydrogen electrode will act as a cathode

electrons will flow from the hydrogen electrode to the copper electrode  

Explanation:

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.