SSC JE Electrical Engineering 2017 Set 4 Paper

Question : 193 of 200

Marks: +1, -0

The direction of rotation of a DC shunt motor is reversed by____

reversing armature connection
interchanging the armature and field connection
adding resistance to the field circuit
reversing supply connections

Solution:

Direction of rotation of a DC shunt motor is reversed by either reversing armature connector or reversed field connection because torque produce by DC shunt motor

T ∝ I_aϕ

.
if reversed either of armature connection or field connection, torque will reverse in rotation.
if we reversed both armature connection and field connection then direction of rotation is in same direction as Previous.

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