luyện từ

Người thợ dùng nam châm để luyện từ cho một thanh sắt.

Definition

1. Verb (obsolete, physics):
   • To magnetize: The process of imparting magnetic properties to an object, making it a magnet. This is an archaic scientific term.

Usage Examples

• Verb:
  • Nhà khoa học dùng dòng điện để luyện từ cho thanh sắt. (The scientist used an electric current to magnetize the iron bar.)
  • Phương pháp luyện từ này nay đã lỗi thời. (This magnetization method is now obsolete.)

Advanced Usage

• This term is primarily found in historical or older scientific texts discussing magnetism. In modern Vietnamese, the more common terms are "từ hóa" (to magnetize) or "nhiễm từ" (to become magnetized).

Variants and Related Words

• Từ hóa (v): to magnetize (modern term).

  • Nam châm điện dùng để từ hóa thép. (An electromagnet is used to magnetize steel.)

• Nhiễm từ (v): to become magnetized.

  • Miếng sắt bị nhiễm từ khi đặt gần nam châm. (The piece of iron became magnetized when placed near a magnet.)

• Khử từ (v): to demagnetize.

  • Cần khử từ cho kim loại trước khi gia công. (The metal needs to be demagnetized before processing.)

Synonyms

• Magnetize: to give magnetic properties to something.
• Induce magnetism: to cause an object to become magnetic.

Notes on Usage

• "Luyện từ" is an archaic term. Learners should be aware that using it in contemporary contexts may sound outdated. For modern communication and scientific contexts, "từ hóa" is the recommended and universally understood verb.