As -the load is increased the speed of D.C. shunt motor will____________?

The power mentioned on the name plate of an electric motor indicates____________?

A. the power drawn in kW
B. the power drawn in kVA
C. the gross power
D. the output power available at the shaft

In a D.C. generator all of the following could be the effects of iron losses except___________?

A. Loss of efficiency
B. Excessive heating of core
C. Increase in terminal voltage
D. Rise in temperature of ventilating air

In a D.C. series motor, if the armature current is reduced by 50%, the torque of the motor will be equal to

A. 100% of the previous value
B. 50% of the previous value
C. 25% of the previous value
D. 10% of the previous value
E. none of the above

In which of the following applications D.C. series motor is invariably tried?

A. Starter for a car
B. Drive for a water pump
C. Fan motor
D. Motor operation in A.C. or D.C

If I2 be the armature current, then speed of a D.C. shunt motor is_______________?

A. independent of Ia
B. proportional to la
C. varies as (Ia)
D. varies as la

Starters are used with D.C. motors because______________?

A. these motors have high starting torque
B. these motors are not self-starting
C. back e.m.f. of these motors is zero initially
D. to restrict armature current as there is no back e.m.f. while starting