A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The external resistance to be added in the armature circuit to limit the armature current to 125% of its rated value is

Electrical Machines
A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The external resistance to be added in the armature circuit to limit the armature current to 125% of its rated value is

15.9 Ω

31.1 Ω

31.9 Ω

15.1 Ω

15.9 Ω

31.1 Ω

31.9 Ω

15.1 Ω

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Electrical Machines
A 10 kW, 230 V, dc shunt machine has four terminals brought out through four leads. For this machine

armature winding has thin leads whereas field winding has thick leads

armature winding has thick leads whereas field winding has thin leads

both the windings have thick leads

both the windings have thin leads

armature winding has thin leads whereas field winding has thick leads

armature winding has thick leads whereas field winding has thin leads

both the windings have thick leads

both the windings have thin leads

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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.

220 V.

225 V.

230 V.

222 V.

220 V.

225 V.

230 V.

222 V.

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Electrical Machines
Two transformers operating in parallel will share the load depending on their

ratings

efficiency

leakage reactance

per unit impedance

ratings

efficiency

leakage reactance

per unit impedance

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Electrical Machines
Reversing the direction of rotation of split phase motors is done by

reversing the terminals of starting winding.

All of these

reversing the terminals of main winding.

interchanging the capacitor from starting winding to main winding or vice versa.

reversing the terminals of starting winding.

All of these

reversing the terminals of main winding.

interchanging the capacitor from starting winding to main winding or vice versa.

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Electrical Machines
A 230 V dc series generator is driven at its rated speed. The no-load voltage across its armature terminals would be

somewhat less than 230 V

6 V

somewhat more than 230 V

230 V

somewhat less than 230 V

6 V

somewhat more than 230 V

230 V

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Electrical Machines

Electrical Machines A 10 kW, 230 V, dc shunt machine has four terminals brought out through four leads. For this machine

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 Two transformers operating in parallel will share the load depending on their

Electrical Machines Reversing the direction of rotation of split phase motors is done by

Electrical Machines A 230 V dc series generator is driven at its rated speed. The no-load voltage across its armature terminals would be

Electrical Machines
A 10 kW, 230 V, dc shunt machine has four terminals brought out through four leads. For this machine

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
Two transformers operating in parallel will share the load depending on their

Electrical Machines
Reversing the direction of rotation of split phase motors is done by

Electrical Machines
A 230 V dc series generator is driven at its rated speed. The no-load voltage across its armature terminals would be