noun
positive electrode; cathode; positive pole
Technical term in electricity and electronics; refers to the electrode with higher electrical potential. In a battery, it is the cathode during discharge.
電池の正極と負極を正しく接続してください。
Please connect the positive and negative terminals of the battery correctly.
LEDは正極を長い方の足に接続します。
For an LED, connect the positive electrode to the longer leg.
陰極 is the negative electrode, similar to 負極, and is the opposite of 正極.
Compound of 正 (positive) and 極 (pole, electrode). The reading せいきょく follows standard on'yomi.