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aman tiwari

· started a discussion

· 1 Months ago

No proper Que (Question:344020.0)

When A.C. supply is given to a D.C. motor: 1)In case of Series connection of armature winding and field winding , it may run. 2)But, In case of parallel connection , it won't rotate at all and will start humming and will create vibrations, as a torque produced by positive and negative cycle will cancel out each other.

Question:

A 230 V dc series motor is connected to a 230 V ac supply

Options:
A)

the motor will vibrate violently

B)

the motor will run with less efficiency and more sparking

C)

the motor will not run

D)

None of the above

Solution:

Ans:(b)

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