The reason for using starter while starting of DC motor is

The reason for using starter while starting of DC motor is

Right Answer is:

To restrict armature current as there is no back E.M.F at starting

SOLUTION

  • At the time of starting a DC Motor, the Back EMF developed is zero as its speed is zero.
  • We know that general emf equation E = Eb + laRa. At starting Eb= 0 so la = E/Ra
  • So very high current flow (which is limited by resistance only but resistance itself is very low usually 1-2 ohms) through the armature of the machine which can destroy it completely.
  • So to protect the machine from such large current, starters which can be simple resistors or the sophisticated 3 point or 4 point starters may be employed.
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