[填空题]
An electron acquiresqjvif+ p3+i wek-9e-o :u gvm4xgb hn+ uv/:i+$7.45 \times10^{ -16}\,J$ of kinetic energy when it is accelerated by an electric field from plate A to plate B. What is the potential difference between the plates, and which plate is at the higher potential?
V
plate