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Manish00

Asked: May 10, 2023In: Electrical Machines

What is the shape of electron?

VARISHA PARVEZ

Asked: May 8, 2023In: Electrical Machines

Which of the following are applications of singly excited magnetic systems? a) electromagnets, relays b) moving-iron instruments c) reluctance motors d) all of the mentioned

VARISHA PARVEZ

Asked: May 8, 2023In: Electrical Machines

If the salient pole rotor in a single phase reluctance motor is replaced by a cylindrical rotor, then Which of the following statements are true? (i) reluctance offered to stator flux remains constant for all rotor positions (ii) no reluctance torque will be developed (iii) reluctance torque will be developed (iv) reluctance offered to stator flux changes for all rotor positions a) (i), (ii) b) (ii), (iii) c) (iii), (iv) d) (i), (iv)

VARISHA PARVEZ

Asked: May 8, 2023In: Electrical Machines

Single phase reluctance motors are extensively used in ________ a) grinder applications b) driving electric clocks and other timing devices c) welding applications d) lifts/ elevators

VARISHA PARVEZ

Asked: May 8, 2023In: Electrical Machines

The single phase reluctance machine acts as a generator when angle δ is _______ a) positive b) negative c) zero d) any of the mentioned

VARISHA PARVEZ

Asked: May 8, 2023In: Electrical Machines

For a given reluctance motor, Rld and Rlq are ________ a) constant b) varying c) zero d) all of the mentioned

VARISHA PARVEZ

Asked: May 8, 2023In: Electrical Machines

For a reluctance motor, the maximum average torque occurs when δ = __________ a) 45° b) 90° c) 0° d) 180°

VARISHA PARVEZ

Asked: May 8, 2023In: Electrical Machines

Reluctance motor can produce torque at ________ a) any speed less than synchronous speed b) synchronous speed only c) any speed greater than synchronous speed d) all of the mentioned

VARISHA PARVEZ

Asked: May 8, 2023In: Electrical Machines

The reluctance offered to the stator flux by two small air gaps in series with high permeability iron, in reluctance machine is minimum, when the space angle θr = ___________ a) 0° b) 45° c) 90° d) 270°

VARISHA PARVEZ

Asked: May 8, 2023In: Electrical Machines

The reluctance offered to the stator flux by two very large air gaps in series with high permeability iron, in reluctance machine is maximum, when the space angle θr = ___________ a) 0° b) 45° c) 90° d) 180°

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Electrical Machines

What is the shape of electron?

Which of the following are applications of singly excited magnetic systems? a) electromagnets, relays b) moving-iron instruments c) reluctance motors d) all of the mentioned

Single phase reluctance motors are extensively used in ________ a) grinder applications b) driving electric clocks and other timing devices c) welding applications d) lifts/ elevators

The single phase reluctance machine acts as a generator when angle δ is _______ a) positive b) negative c) zero d) any of the mentioned

For a given reluctance motor, Rld and Rlq are ________ a) constant b) varying c) zero d) all of the mentioned

For a reluctance motor, the maximum average torque occurs when δ = __________ a) 45° b) 90° c) 0° d) 180°

Reluctance motor can produce torque at ________ a) any speed less than synchronous speed b) synchronous speed only c) any speed greater than synchronous speed d) all of the mentioned

The reluctance offered to the stator flux by two small air gaps in series with high permeability iron, in reluctance machine is minimum, when the space angle θr = ___________ a) 0° b) 45° c) 90° d) 270°

The reluctance offered to the stator flux by two very large air gaps in series with high permeability iron, in reluctance machine is maximum, when the space angle θr = ___________ a) 0° b) 45° c) 90° d) 180°

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