The primary method of varying the speed on a DC shunt motor is to ...

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The primary method of varying the speed on a DC shunt motor is to adjust the voltage and current on the field
  winding or the _____.
 
  a. rheostat
  b. armature
  c. controller
  d. stator key

Question 2

For a constant-torque load, the horsepower increases and decreases _____.
 
  a. in direct proportion to the speed
  b. as the cube of the speed
  c. in inverse proportion to the speed
  d. as the square of the speed

[bhavsar]

Answer to Question 1

b

Answer to Question 2

a

[fasfsadfdsfa]

Thanks for the timely response, appreciate it

[amcvicar]

Excellent