If a coil is drawing 1 amp and contains 100 turns of wire, what is the MMF?

The correct answer is based on the definition of magnetomotive force (MMF), which is calculated using the formula:

MMF = Current (in amperes) × Number of turns.

In this scenario, the coil is drawing a current of 1 amp and has 100 turns of wire. By substituting the values into the formula, we find:

MMF = 1 amp × 100 turns = 100 amp-turns.

This clearly shows why the answer is 100 amp-turns. Understanding MMF is critical in electrical engineering, as it helps in analyzing magnetic circuits and their behavior. The importance of knowing the number of turns and current is key when designing magnetic components like inductors or electromagnets, as it determines the strength of the magnetic field generated in the coil.