Direct Current Generator Or DC Generator Objective Questions and Answers

6.  The fall in speed of a DC generator due to increase in load can be corrected by

   A. Cooling the armature

   B. Increasing the excitation

   C. Reducing the load voltage

   D. Increasing the input to the prime mover

7.  With the increases in field excitation of a DC generator its generated emf

   A. Increases

   B. Decreases

   C. Remain constant

   D. Increasing upto a limit and then remain almost constant

8.  In DC generators current to the external circuit from armature is given through

   A. Commutator

   B. Solid connection

   C. Slip rings

   D. None of the above

9.  In DC generator on no-load

   A. Magnetic neutral axis moves from geometrical neutral axis in the opposite direction of rotation

   B. Magnetic neutral axis coincides with geometrical neutral axis

   C. Magnetic neutral axis moves from geometrical neutral axis in the direction of rotation

   D. None of the above

10.  In a DC generator the armature reaction results in

   A. The magnetisation of the centres of poles

   B. Magnetisation of Interpoles

   C. Demagnetisation of the leading Pole tip and magnetisation of the trailing pole tip

   D. Magnetisation of the leading Pole tip and demagnetisation of the trailing pole tip

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