Q30 of 238 Page 103

Each one of the following changes will increase e.m.f. (or voltage) in a simple generator except:

Each one of the following changes will increase emf (or voltage) in a simple generator except:

increasing the size of the gap in which the armature turns.

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28

The essential difference between an AC generator and a DC generator is that:

 29

When the switch Sis closed in the figure given below, the pointer of the galvanometer moves to the right.


If S is kept closed, will the pointer:

 31

The north pole of a long bar magnet was pushed slowly into a short solenoid connected to a galvanometer. The magnet was held stationary for a few seconds with the north pole in the middle of the solenoid and then withdrawn rapidly. The maximum deflection of the galvanometer was observed when the magnet was:

 32

An electric generator converts: