Microcontrollers contain external memory controllers ...

[Melani1276]

Microcontrollers contain external memory controllers because________.
 
  A) communication controllers and other peripherals require external memory to operate
  B) all microcontrollers require an external ROM to boot up
  C) some microcontrollers do not contain any intenal memory
  D) All of the above

Question 2

Pulse width modulation can be used to control a motor by using the duty cycle to ________.
 
  A) change effective current delivered to the motor winding
  B) change the effective voltage applied to the motor winding
  C) changiethe amplitude of the winding current
  D) change the amplitued of the winding voltage

[Kjones0604]

Answer to Question 1

C

Answer to Question 2

A

[Melani1276]

Excellent

[duy1981999]

Thanks for the timely response, appreciate it