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Electrical Machines
Lamination of core are generally made of
cast iron.
carbon.
stainless steel.
silicon steel.
cast iron.
carbon.
stainless steel.
silicon steel.
Answer
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Related Question
Electrical Machines
R1 is the resistance of the primary winding of the transformer. The turn ratio in terms of primary to secondary is K. Then the equivalent resistance of the primary referred to secondary is
K×R1
R1 /K²
R1 /K
K²R1
K×R1
R1 /K²
R1 /K
K²R1
Answer
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Electrical Machines
In above question, the output power delivered by generator G1 and G2 will be
5.7 kW, 8.7 kW.
9.3 kW, 9.3 kW.
6.3 kW, 9.3 kW.
9.6 kW, 12 kW.
5.7 kW, 8.7 kW.
9.3 kW, 9.3 kW.
6.3 kW, 9.3 kW.
9.6 kW, 12 kW.
Answer
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Electrical Machines
In synchronous generator a synchronous dead load (lamp, furnaces etc) has no ____________ hence it has no natural frequency of oscillation.
synchronizing power co efficient.
restoring torque.
mechanical rotatory system.
damping torque.
synchronizing power co efficient.
restoring torque.
mechanical rotatory system.
damping torque.
Answer
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Electrical Machines
In Ward-Leonard system, the lower limit of the speed imposed by
None of above.
Field resistance.
Armature resistance.
Residual magnetism of the generator.
None of above.
Field resistance.
Armature resistance.
Residual magnetism of the generator.
Answer
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Electrical Machines
At stand still condition the value of slip is
0
finite value
infinite value
1
0
finite value
infinite value
1
Answer
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