No. 1 is not true because a Permanent magnet DC motor is also one of the main types of DC motors. A DC motor is any of a class of motors that converts direct current electrical energy into mechanical energy.
There are actually 4 main types of DC motors. Namely Series, Shunt, and Compound and Permanent Magnet DC Motors.
The permanent motor magnet requires a permanent magnet to generate flux of field. This form of DC motor offers excellent initial torque and strong speed control, however power is restricted so they are usually used in applications with low horsepower rates.
A is a mixture B is a gaseous mixture C is relating to a mixture D describes a solution ((which basically is a combination of 2 or more elements with identical composition throughout))
