Question
Armature current in dc motor will be maximum when
At starting ${E_b} = 0,$ so ${I_a}$will be maximum.
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If $v_1\,\,cos\,\,\theta _1 = v_2\,\,cos\,\,\theta _2$, then choose the incorrect statement

(${\mu _{oil}} = 1.45,\,{\mu _{water}} = 1.33$)