A 220 ,V 15 , kW 100 rpm shunt motor with armature resistance of 0.25 , W has a rated line current of 68 A and a rated field current of 2.2 A. The change in field flux required to obtain a speed of 1600 rpm while drawing a line current of 52.8 A and a field current of 1.8 A is

Electrical Machines
A 220 ,V 15 , kW 100 rpm shunt motor with armature resistance of 0.25 , W has a rated line current of 68 A and a rated field current of 2.2 A. The change in field flux required to obtain a speed of 1600 rpm while drawing a line current of 52.8 A and a field current of 1.8 A is

36.36% increase

36.36% decrease

18.18% increase

36.36% increase

36.36% decrease

18.18% increase

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Electrical Machines
The output power of any electrical motor is taken from the

Armature.

Coupling mounted on the shaft.

Field.

Motor frame.

Armature.

Coupling mounted on the shaft.

Field.

Motor frame.

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Electrical Machines
In a DC machine the armature mmf is

stationary with respect to armature.

rotating with respect to field poles as well as armature.

stationary with respect to field poles.

rotating with respect to field poles.

stationary with respect to armature.

rotating with respect to field poles as well as armature.

stationary with respect to field poles.

rotating with respect to field poles.

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Electrical Machines
The speed of a motor falls from 1100 r.p.m at no-load to 1050 r.p.m at rated load. The speed regulation of motor is

2.56 %.

2.57 %.

3.76%.

4.76%.

2.56 %.

2.57 %.

3.76%.

4.76%.

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Electrical Machines
A dc shunt generator, when commissioned after a major repair of the field system, failed to build Up voltage. It was because

field system lost residual magnetism

there was a break in the armature circuit

field winding was wrongly connected

field resistance was higher than critical resistance

field system lost residual magnetism

there was a break in the armature circuit

field winding was wrongly connected

field resistance was higher than critical resistance

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Electrical Machines
The short circuit test on a transformer is conducted to obtain

hysteresis loss.

copper losses.

core loses only.

eddy current loss.

hysteresis loss.

copper losses.

core loses only.

eddy current loss.

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Electrical Machines

Electrical Machines A 220 ,V 15 , kW 100 rpm shunt motor with armature resistance of 0.25 , W has a rated line current of 68 A and a rated field current of 2.2 A. The change in field flux required to obtain a speed of 1600 rpm while drawing a line current of 52.8 A and a field current of 1.8 A is

Electrical Machines The output power of any electrical motor is taken from the

Electrical Machines In a DC machine the armature mmf is

Electrical Machines The speed of a motor falls from 1100 r.p.m at no-load to 1050 r.p.m at rated load. The speed regulation of motor is

Electrical Machines A dc shunt generator, when commissioned after a major repair of the field system, failed to build Up voltage. It was because

Electrical Machines The short circuit test on a transformer is conducted to obtain

Electrical Machines
A 220 ,V 15 , kW 100 rpm shunt motor with armature resistance of 0.25 , W has a rated line current of 68 A and a rated field current of 2.2 A. The change in field flux required to obtain a speed of 1600 rpm while drawing a line current of 52.8 A and a field current of 1.8 A is

Electrical Machines
The output power of any electrical motor is taken from the

Electrical Machines
In a DC machine the armature mmf is

Electrical Machines
The speed of a motor falls from 1100 r.p.m at no-load to 1050 r.p.m at rated load. The speed regulation of motor is

Electrical Machines
A dc shunt generator, when commissioned after a major repair of the field system, failed to build Up voltage. It was because

Electrical Machines
The short circuit test on a transformer is conducted to obtain