noun
Physics term for an electric charge with a positive sign, as opposed to 負電荷 (negative charge).
陽子は正電荷を持っている。
A proton has a positive charge.
電荷 is the general term for 'electric charge', while 正電荷 specifies a positive charge.
Compound of 正 (せい, 'positive') and 電荷 (でんか, 'electric charge').