Question $4$:

$($a$).$ What are the main differences between a microcontroller and a microprocessor? Draw the architectural diagram of a microcontroller showing main components. $(10$ points$)$

$($b$).$ Consider a Permanent Magnet DC Motor with the following constants $($pay attention to units$)Kt=0\mathrm{.}12N\frac{m}{A},Ke=12\frac{V}{1000}r.p.m,$ Armature Resistance $=1\mathrm{.}5$ ohms, Applied Voltage $=10V(15$ points$)$

Find the following:

$($a$)$ No load speed

$($b$)$ Stall current and Starting torque