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Consider the following sentence.

> 電磁誘導とは、磁束が変動する環境下に **存在する** 導体に電位差（電圧）が生じる現象である。

Can I replace 存在 with ある as follows?

> 電磁誘導とは、磁束が変動する環境下に **ある** 導体に電位差（電圧）が生じる現象である。

Bonus question: What does ～下に mean in 磁束が変動する環境下に ?
CC BY-SA 3.0
2016-12-01T13:53:11.037
41366
2016-12-01T14:26:48.063
11192
question
grammar word-choice meaning
Can I replace 存在 with ある in this sentence?
Yes, you could for the meaning, but it would **_not_** be advisable to do so
because that would create some imbalance in the over-all formality of the
sentence.

This sentence is very stiff and academic as it should be. If you replaced one
of the words by another word with the same meaning but with a lower level of
formality (存在する vs. ある, in this case), the result would almost always be less
than ideal.

Finally, that 「下」 is read 「か」 and it is a suffix meaning "in", "under", etc.

「影響下{えいきょうか}」 = "under the influence (of)"

Other common examples:

「フランスの支配下{しはいか}にある国」= "a country under the control of France"

「インフレ下{か}の日本」= "Japan in recession"
CC BY-SA 3.0
2016-12-01T14:20:02.953
41367
2016-12-01T14:26:48.063
2016-12-01T14:26:48.063
41366
answer