DC Motors
For a D.C. shunt motor if the excitation is changed

Torque, power and speed, all will change
Torque will remain constant
Torque and power both will change
Torque will change but power will remain constant

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DC Motors
The speed of a dc motor is

inversely proportional to flux per pole
None of the listed here
Directly proportional to flux per pole
inversely proportional to applied voltage

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