For a D.C. shunt motor if the excitation is changed torque will change but power will remain constant.
Answer : If the field of a D.C. shunt motor gets opened while motor is running the motor will attain dangerously high speed.
Answer : The speed of a D.C. shunt motor can be increased by increasing the resistance in field circuit.
Answer : The armature torque of the D.C. shunt motor is proportional to armature current.
Answer : As the load is increased the speed of D.C. shunt motor will reduce slightly.
Answer : In a D.C. shunt motor, under the conditions of maximum power, the current in the armature will be more than full-load current.