Rotational losses in d.c. machines is equal to rate of change of kinetic energy

Q.  The rotational losses in d.c. machines is equal to the
- Published on 19 Oct 15

a. Kinetic energy of armature
b. Half of the kinetic energy of armature
c. Square of the kinetic energy of armature
d. Rate of change of kinetic energy

ANSWER: Rate of change of kinetic energy

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    Discussion

  • Nadeem   -Posted on 24 Dec 16
    Exact solution I don't...But I had just tried to use the basics...
    Energy= Power X Time.
    Hence Power = Energy / Time.
    In our case Power is Losses and Energy is K.E.
    Thus Losses = K.E. / Time.
    Option (d)

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