An ampere-turn is defined as the magnetizing force produced by a current of one ampere flowing through a coil of how many turns?

An ampere-turn is defined as the magnetizing force produced by a current of one ampere flowing through a coil of how many turns?

• A. One turn
• B. Two turns
• C. Ten turns
• D. Hundred turns

Answer: (A)

Ampere-turns measure magnetizing force as the product of current and coil turns. By definition, the magnetizing force equals NI, where N is the number of turns and I is the current in amperes. With a current of one ampere flowing through a coil of one turn, you get 1 × 1 = 1 ampere-turn. This unit grows if you increase either the current or the number of turns, so any other combination would produce a different value.

Ampere-turns measure magnetizing force as the product of current and coil turns. By definition, the magnetizing force equals NI, where N is the number of turns and I is the current in amperes. With a current of one ampere flowing through a coil of one turn, you get 1 × 1 = 1 ampere-turn. This unit grows if you increase either the current or the number of turns, so any other combination would produce a different value.