磁場

• Reading: じば
• Romaji: jiba
• Kanji breakdown: 磁 (ji) — magnetism | 場 (ba) — field, place
• Pronunciation: /dʑi.ba/

Meaning

Magnetic field; the region of space around a magnet or electric current where magnetic forces are exerted.

A fundamental concept in electromagnetism. The Earth generates a magnetic field (地球の磁場) that protects against solar wind. 磁場の強さ (magnetic field strength) is measured in tesla (T). Key applications: MRI machines, electric motors, particle accelerators. Also written as 磁界 (jikai) in some technical contexts.

Examples

1. 地球は巨大な磁場を持っており、方位磁針はその影響を受けて北を指す。 The Earth has a vast magnetic field, which causes compass needles to point north under its influence.
2. 強い磁場が生じる環境では、精密な電子機器が誤作動を起こすことがある。 In environments where strong magnetic fields are generated, precision electronic equipment may malfunction.
3. MRI装置は強力な磁場を利用して体内の組織を画像化する医療機器だ。 An MRI machine is a medical device that uses powerful magnetic fields to produce images of tissue inside the body.

Usage Guide

Context: physics, electromagnetism, medicine, engineering

Tone: technical

Origin & History

Compound of 磁 (ji) meaning 'magnetism' and 場 (ba/jo) meaning 'field, place'. 磁 itself contains the 石 (stone) radical, reflecting the ancient discovery of magnetism in lodestone.

Cultural Context

Era: Meiji–Modern

Generation: Students and researchers

Social background: Academic