A 4 pole wave wound dc motor having flux per pole of 9.56 X 10-3 Wb contains 460 armature conductors with armature resistance of 0.6 ohm. Calculate the starting current flowing through the armature if the supply voltage is 240 volt.

Electrical Machines
A 4 pole wave wound dc motor having flux per pole of 9.56 X 10-3 Wb contains 460 armature conductors with armature resistance of 0.6 ohm. Calculate the starting current flowing through the armature if the supply voltage is 240 volt.

0.5 Amp.

800 Amp.

320 Amp.

400 Amp.

0.5 Amp.

800 Amp.

320 Amp.

400 Amp.

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Electrical Machines
If the excitation is increased, the power factor is

lagging power factor

leading power factor

None of these

unity power factor

lagging power factor

leading power factor

None of these

unity power factor

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Electrical Machines
The breakdown torque of a synchronous motor varies as

1/V²

V²

applied voltage V

1/V

1/V²

V²

applied voltage V

1/V

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Electrical Machines
The maximum power developed in cylindrical synchronous machine is occurs at a load angle of

0o.

90o.

Greater than 90o.

less than 90o.

0o.

90o.

Greater than 90o.

less than 90o.

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Electrical Machines
CRGO steel is used in the core of transformer to reduce

both eddy current and hysteresis loss.

eddy current loss.

ohmic loss.

hysteresis loss.

both eddy current and hysteresis loss.

eddy current loss.

ohmic loss.

hysteresis loss.

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Electrical Machines
Find the reactance voltage when current is changed from -2A to 2A in 4 sec and self inductance is 1H?

2 V

0 V

4 V

1 V

2 V

0 V

4 V

1 V

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Electrical Machines

Electrical Machines A 4 pole wave wound dc motor having flux per pole of 9.56 X 10-3 Wb contains 460 armature conductors with armature resistance of 0.6 ohm. Calculate the starting current flowing through the armature if the supply voltage is 240 volt.

Electrical Machines If the excitation is increased, the power factor is

Electrical Machines The breakdown torque of a synchronous motor varies as

Electrical Machines The maximum power developed in cylindrical synchronous machine is occurs at a load angle of

Electrical Machines CRGO steel is used in the core of transformer to reduce

Electrical Machines Find the reactance voltage when current is changed from -2A to 2A in 4 sec and self inductance is 1H?

Electrical Machines
A 4 pole wave wound dc motor having flux per pole of 9.56 X 10-3 Wb contains 460 armature conductors with armature resistance of 0.6 ohm. Calculate the starting current flowing through the armature if the supply voltage is 240 volt.

Electrical Machines
If the excitation is increased, the power factor is

Electrical Machines
The breakdown torque of a synchronous motor varies as

Electrical Machines
The maximum power developed in cylindrical synchronous machine is occurs at a load angle of

Electrical Machines
CRGO steel is used in the core of transformer to reduce

Electrical Machines
Find the reactance voltage when current is changed from -2A to 2A in 4 sec and self inductance is 1H?