# The working of a synchronous motor is similar to

A. gear train arrangement

B. transmission of mechancial power by shaft

C. distribution transformer

D. turbine

**Answer: Option B **

**The net armature voltage of a synchronous motor is equal to the**

A. vector sum of Eb and V

B. arithmetic sum of Eb and V

C. arithmetic difference of Eb and V

D. vector difference of Eh and V

**Synchronous motors are generally not self-starting because**

A. the direction of rotation is not fixed

B. the direction of instantaneous torque reverses after half cycle

C. startes cannot be used on these machines

D. starting winding is not provided on the machines

**A synchronous motor can be made self starting by providing**

A. Damper winding on rotor poles

B. Damper winding on stator

C. Damper winding on stator as well as rotor poles

D. None of the above

A. no change of power factor

B. lagging power factor with over-excitation

C. leading power factor with under-excitation

D. leading power factor with over-excitation

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