magnetism; magnetic force
Refers to the physical phenomenon of magnetism or the force exerted by a magnetic field. Used in both technical and general contexts.
Metal sticks together by magnetic force.
この磁石は磁力が強い。
This magnet has strong magnetism.
地力 (じりき, innate ability) and 磁力 (じりょく, magnetic force) sound similar and share the kanji 力, but their meanings are completely unrelated.
Compound of 磁 (ji, 'magnet') and 力 (ryoku, 'force'). The kanji 磁 is a phono-semantic compound with 石 (stone) and 茲 (phonetic), originally referring to lodestone.