Definition

1. Noun:
   • Variometer (in electricity/electronics): A device used to measure or indicate variations, specifically a variable inductor whose inductance can be adjusted. It is commonly used in electrical circuits and radio equipment.

Usage Examples

• Noun:
  • Anh ấy đang điều chỉnh biến cảm trong mạch điện. (He is adjusting the variometer in the circuit.)
  • Biến cảm là một linh kiện quan trọng trong máy thu thanh cổ điển. (The variometer is an important component in classic radio receivers.)

Advanced Usage

• Technical Context: In electrical engineering, a "biến cảm" is specifically a type of variable inductor used for tuning resonant circuits, often found in radio transmitters and receivers to select different frequencies.
  • Nhờ có biến cảm, tần số cộng hưởng của mạch có thể được thay đổi dễ dàng. (Thanks to the variometer, the resonant frequency of the circuit can be changed easily.)

Variants and Related Words

• Cuộn cảm / Cuộn dây cảm ứng (n): Inductor / Coil. This is the general term for an inductor, while "biến cảm" refers specifically to a variable one.
• Biến trở (n): Potentiometer / Variable resistor. A related component that varies electrical resistance, not inductance.

Synonyms

• Variable inductor: (English technical term) A component whose inductance can be varied.
• Tuning coil: (English descriptive term) Often used in the context of radio tuning.

Notes on Usage

• Field-Specific Term: The word "biến cảm" is a specialized technical term used almost exclusively in the fields of electrical engineering and electronics. It is not used in everyday conversation.
• Structure: The word is a compound noun formed from "biến" (to change/vary) and "cảm" (short for "cảm ứng" - induction), literally meaning "variable induction."

1. (điện) Variometer