A DC motor is specified for a variable speed application The

A DC motor is specified for a variable speed application. The purchasing department has found a synchronous motor for $50 less. Explain why that would or would not be a good choice to buy.

Dc motor is preferable because we need for the application of variable speeds dc motor very good running at variable speeds but synchronous motor is a constant speed motor we can\'t vary the speeds so for variable speed application we prefer dc motor.