Q:- Why is the starting current high in a DC motor?
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Ans:In DC motors, Voltage equation is V=Eb+IaRa
(V = Terminal voltage,
Eb = Back emf in Motor,
Ia = Armature current,
Ra = Aramture resistance).
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At starting, Eb is zero. Therefore, V=IaRa, Ia = V/Ra ,where Ra is very less like 0.01ohm.i.e, Ia will become enormously increased.
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