A 400 V, 50 Hz, 30 Hp, three phase IM is drawing 50 A current at 0.8 p.f lagging. The stator and rotor copper losses are 1.5 KW and 900 W respectively. The friction and windage losses are 1050 W and core losses are 1200 W. The air gap power of the motor will be

Electrical Machines
A 400 V, 50 Hz, 30 Hp, three phase IM is drawing 50 A current at 0.8 p.f lagging. The stator and rotor copper losses are 1.5 KW and 900 W respectively. The friction and windage losses are 1050 W and core losses are 1200 W. The air gap power of the motor will be

26.21 kW.

25 kW.

24.11 kW.

23.06 kW.

26.21 kW.

25 kW.

24.11 kW.

23.06 kW.

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Electrical Machines
The total core loss of a 400 V, 50 Hz transformer is 2400W, when it is supplied by 200 V, 25 Hz loss is 800W. Calculate eddy current loss and hysteresis loss?

800W, 1600W

1000W , 1400W

1400W, 1000W

1600W, 800W

800W, 1600W

1000W , 1400W

1400W, 1000W

1600W, 800W

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Electrical Machines
A 220 V DC machine has an armature resistance 1ÃŽÂ©. If the full load current is 20 A, the difference of induced voltage and generator is

0 V.

40 V.

20 V.

60 V.

0 V.

40 V.

20 V.

60 V.

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Electrical Machines
If the air gap of IM is increased, ____________ will increase.

power factor.

magnetizing current.

speed.

air gap flux.

power factor.

magnetizing current.

speed.

air gap flux.

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Electrical Machines
A DC Shunt Motor having shunt field resistance of 250 Ω and armature resistance of 0.5 Ω is connected to 250 V supply and load current of 21 A. What is the back emf generated ?

150 V.

240 V.

210 V

230 V.

150 V.

240 V.

210 V

230 V.

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Electrical Machines
For a DC machine having P no of pole pairs, Z no of conductors having length L of resistivity ρ and cross section S are arranged. what is the armature resistance for simple wave-winding ?

PZL/4Sp²

PZL/4Sa²

PZL/ 4Sa

PZL/4S

PZL/4Sp²

PZL/4Sa²

PZL/ 4Sa

PZL/4S

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Electrical Machines

Electrical Machines A 400 V, 50 Hz, 30 Hp, three phase IM is drawing 50 A current at 0.8 p.f lagging. The stator and rotor copper losses are 1.5 KW and 900 W respectively. The friction and windage losses are 1050 W and core losses are 1200 W. The air gap power of the motor will be

Electrical Machines The total core loss of a 400 V, 50 Hz transformer is 2400W, when it is supplied by 200 V, 25 Hz loss is 800W. Calculate eddy current loss and hysteresis loss?

Electrical Machines A 220 V DC machine has an armature resistance 1ÃŽÂ©. If the full load current is 20 A, the difference of induced voltage and generator is

Electrical Machines If the air gap of IM is increased, ____________ will increase.

Electrical Machines A DC Shunt Motor having shunt field resistance of 250 Ω and armature resistance of 0.5 Ω is connected to 250 V supply and load current of 21 A. What is the back emf generated ?

Electrical Machines For a DC machine having P no of pole pairs, Z no of conductors having length L of resistivity ρ and cross section S are arranged. what is the armature resistance for simple wave-winding ?

Electrical Machines
A 400 V, 50 Hz, 30 Hp, three phase IM is drawing 50 A current at 0.8 p.f lagging. The stator and rotor copper losses are 1.5 KW and 900 W respectively. The friction and windage losses are 1050 W and core losses are 1200 W. The air gap power of the motor will be

Electrical Machines
The total core loss of a 400 V, 50 Hz transformer is 2400W, when it is supplied by 200 V, 25 Hz loss is 800W. Calculate eddy current loss and hysteresis loss?

Electrical Machines
A 220 V DC machine has an armature resistance 1ÃŽÂ©. If the full load current is 20 A, the difference of induced voltage and generator is

Electrical Machines
If the air gap of IM is increased, ____________ will increase.

Electrical Machines
A DC Shunt Motor having shunt field resistance of 250 Ω and armature resistance of 0.5 Ω is connected to 250 V supply and load current of 21 A. What is the back emf generated ?

Electrical Machines
For a DC machine having P no of pole pairs, Z no of conductors having length L of resistivity ρ and cross section S are arranged. what is the armature resistance for simple wave-winding ?