# In a D.C. generator in case the resistance of the field winding is increased, then output voltage will?

17 views

In a D.C. generator in case the resistance of the field winding is increased, then output voltage will decrease.

## Related questions

For a D.C. generator when the number of poles and the number of armature conductors is fixed, then which winding will give the higher e.m.f. ?

A 200 V DC machine supplies 20 A at 200 V as a generator. The armature resistance is 0.2 Ohm. If the machine is now operated as a motor at same terminal voltage and current but with the flux increased by 10%, the ratio of motor speed to generator speed is

A cumulatively compounded d.c. generator is supplying 20 A at 200 V. If the series field winding is short circuited, the terminal voltage will (a) remain unaltered (b) rise to 220 V (c) shoot up to a very high value (d) become less than 200 V

The e.m.f. induced in the armature of a shunt generator is 600 V. The armature resistance is 0.1 ohm. If the armature current is 200 A, the terminal voltage will be?

From which material field coils of DC generator are made of?

The eddy current loss in a dc generator is 400 W at 40 Hz frequency of reversal and constant flux density. When frequency is increased to 50 Hz., eddy current loss is :  (A) 256 W (B) 320 W (C) 500 W (D) 625 W

The fall in speed of a dc generator due to increase in load can be corrected by  (1) cooling the armature.. (2) increasing the excitation. (3) reducing the load voltage. (4) increasing the input to the prime mover

In a DC generator the windings of interpoles are connected :  (A) in series with main field winding, to create a pole,of same polarity as the main pole ahead in the direction of rotation.  (B) in series with main field winding, to create a pole of opposite polarity as the main pole ahead in the direction of ... in the direction of rotation.  (D) in series with the armature winding, to create a pole of opposite polarity as the main pole ahead in the direction of rotation.

If the field circuit resistance of a d.c. generator exceed its critical value, then the generator : -  a) fails to build up b) builds up a very high voltage c) exceeds its current capacity d) produces power beyond its rating

The terminal characteristics of a dc generator suitable for electric welders is (A) separately excited generator (B) shunt generator (C) series generator (D) differentially compounded generator