SSC JE Electrical Engineering 22 Jan 2018 Morning Paper

Question : 152 of 200

Marks: +1, -0

Armature current at starting can be reduced by keeping

$R_\f$ maximum and $R_a$ minimum
$R_a$ maximum and $R_f$ maximum
$R_a$ minimum and $R_f$ minimum
$R_a$ maximum and $R_f$ minimum

Solution:

In order to reduce armature current,

R_a

should be maximum and

R_F

should be minimum. By doing this starting current will reach field winding instead of armature winding and thus armature current will reduce and use will get superior starting torque.

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