SSC JE Electrical Engineering 24 Jan 2018 Evening Paper

Question : 166 of 200

Marks: +1, -0

The direction of rotation of universal motor can be reversed by reversing the flow of current through_______.

armature winding
field winding
either armature winding or field winding
None of these

Solution:

Torque equation of universal series motor∝

I_aϕ

. So if either reverse in field winding or reversing of ar mature winding torque will Reverse and motor will move in Reverse direction. So Silica is not a material use for moving porceline insulator.

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