The direction of generated emf in the armature coil of a DC machine is 1. the same as that of the current in a generator 2. the same as that of the current in a motor 3. opposite to that of the current in a generator 4. opposite to that of the current in a motor From these, the correct answer is

Electrical Machines
The direction of generated emf in the armature coil of a DC machine is 1. the same as that of the current in a generator 2. the same as that of the current in a motor 3. opposite to that of the current in a generator 4. opposite to that of the current in a motor From these, the correct answer is

1, 3

2, 4

1, 4

2, 3

1, 3

2, 4

1, 4

2, 3

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Electrical Machines
In synchronous generator V curve is drawn between

either of these.

field current on X-axis and armature current on Y-axis.

field current on X-axis and power factor on Y-axis.

field current on Y-axis and armature current on X-axis.

either of these.

field current on X-axis and armature current on Y-axis.

field current on X-axis and power factor on Y-axis.

field current on Y-axis and armature current on X-axis.

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Electrical Machines
Thin laminations are used in a machine in order to reduce

Hysteresis losses

Copper losses

Both 1 and 2

Eddy current losses

Hysteresis losses

Copper losses

Both 1 and 2

Eddy current losses

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Electrical Machines
The direction of rotation of a DC motor can be determined by

Lenz's law.

Ampere's law.

Fleming's right hand rule.

Fleming's left hand rule.

Lenz's law.

Ampere's law.

Fleming's right hand rule.

Fleming's left hand rule.

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Electrical Machines
Cogging in induction motor occurs when

number of stator teeth - number of rotor teeth = even number.

number of stator teeth - number of rotor teeth = 0.

number of stator teeth - number of rotor teeth = negative number.

number of stator teeth - number of rotor teeth = odd number.

number of stator teeth - number of rotor teeth = even number.

number of stator teeth - number of rotor teeth = 0.

number of stator teeth - number of rotor teeth = negative number.

number of stator teeth - number of rotor teeth = odd number.

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Electrical Machines
For the above problem, find the induced voltage of an alternator of it is to deliver a load of 100 A at power factor of 0.8 lagging with terminal voltage of 200 V.

230 V.

220 V.

225 V.

222 V.

230 V.

220 V.

225 V.

222 V.

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Electrical Machines

Electrical Machines In synchronous generator V curve is drawn between

Electrical Machines Thin laminations are used in a machine in order to reduce

Electrical Machines The direction of rotation of a DC motor can be determined by

Electrical Machines Cogging in induction motor occurs when

Electrical Machines For the above problem, find the induced voltage of an alternator of it is to deliver a load of 100 A at power factor of 0.8 lagging with terminal voltage of 200 V.

Electrical Machines
In synchronous generator V curve is drawn between

Electrical Machines
Thin laminations are used in a machine in order to reduce

Electrical Machines
The direction of rotation of a DC motor can be determined by

Electrical Machines
Cogging in induction motor occurs when

Electrical Machines
For the above problem, find the induced voltage of an alternator of it is to deliver a load of 100 A at power factor of 0.8 lagging with terminal voltage of 200 V.