SSC JE Electrical Engineering 23 Jan 2018 Evening Paper

Question : 152 of 200

Marks: +1, -0

If the field of a dc shunt motor gets opened while the motor is running, then the

Solution:

If field of DC shunt motor is open then flux will be zero.

E∝\ϕw

i.e.

w∝1/ϕ

If flux is zero, then speed is dangerously high.

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