na-adjective
electromagnetic
Technical term used in physics and engineering to describe phenomena involving both electricity and magnetism.
電磁的な波は光速で伝わる。
Electromagnetic waves travel at the speed of light.
この装置は電磁的な力を利用している。
This device uses electromagnetic force.
Compound of 電磁 (denji, 'electromagnetic') + 的 (-teki, '-like, -ic'). The base 電磁 is itself a compound of 電 (den, 'electricity') and 磁 (ji, 'magnetism').