How to Say "Electromagnetism" in Japanese

電磁気

denjiki[dẽ̞ɲ̟d͡ʑikʲi]

Electromagnetism in Japanese is 電磁気 (denjiki). Wiktionary also lists 電磁気学 (denjikigaku).

Meaning: fundamental interaction (noun)

Ways to say it

“electromagnetism” in Japanese
Japanese	Romanization (Wiktionary)	IPA
電磁気	denjiki	[dẽ̞ɲ̟d͡ʑikʲi] (narrow)
電磁気学	denjikigaku	[dẽ̞ɲ̟d͡ʑikʲiɡa̠kɯ̟] (narrow)

Use 電磁気学 when you are referring to the academic discipline or the science of electromagnetism, whereas 電磁気 refers to the phenomenon itself.

denjiki

The character 気 in 電磁気 is the same character used for 'spirit' or 'life force' in traditional East Asian philosophy, showing how ancient concepts of 'vital energy' were adapted for modern physics.
The character 磁 (ji) contains the radical for 'stone', which reflects the historical use of magnetite stones to study magnetism.
The term 電磁気学 is a 'kango' word, meaning it is composed entirely of characters borrowed from Chinese.

電磁気の原理に基づいて、磁場を作り出すことができます。
Based on the principles of electromagnetism, we can generate a magnetic field.
電磁気の現象を研究することは興味深く、学ぶ価値があります。
Studying electromagnetic phenomena is interesting and worthwhile.

Misaki and Ren are studying for a physics exam in the library.

美咲 Misaki

蓮、電磁気の問題は解けた？
Ren, denjiki no mondai wa toketa?
Ren, were you able to solve the electromagnetism problem?
蓮 Ren

いいえ、まだ全然わかりません。
Iie, mada zenzen wakarimasen.
No, I don't understand it at all yet.
美咲 Misaki

一緒に復習しましょうか。
Issho ni fukushuu shimashou ka.
Shall we review it together?
蓮 Ren

お願いします、美咲さん。
Onegaishimasu, Misaki-san.
Please help me, Misaki.

Sources

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