Identify the INCORRECT statement with regards to synchronous motors

SSC JE Electrical 2019 with solution SET-1
Identify the INCORRECT statement with regards to synchronous motors

The field winding is placed on the rotor

It is a self-starting machine

The armature winding is placed on the stator

It is a constant speed motor

The field winding is placed on the rotor

It is a self-starting machine

The armature winding is placed on the stator

It is a constant speed motor

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SSC JE Electrical 2019 with solution SET-1
What is the reason behind using a centrifugal switch in a single-phase induction motor?

To out in the capacitor during running conditions

To protect the motor from overloading

To cut-off the starting winding at an appropriate instant

To improve the starting performance of the motor

To out in the capacitor during running conditions

To protect the motor from overloading

To cut-off the starting winding at an appropriate instant

To improve the starting performance of the motor

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SSC JE Electrical 2019 with solution SET-1
Two decimal coils A and B of 1000 turns each lies in the parallel plane such that 80% of the flux produced by one coil links with the other. If a current of 5A flowing in A produces a flux of 0.05 mWb, then the flux linking with coil B is:

0.04 mWb

4 mWb

0.4 mWb

0.004 mWb

0.04 mWb

4 mWb

0.4 mWb

0.004 mWb

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SSC JE Electrical 2019 with solution SET-1
_______is a tube that brings water to turbines

Penstock

Spillway

Forebay

Trash rack

Penstock

Spillway

Forebay

Trash rack

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SSC JE Electrical 2019 with solution SET-1
In the two wattmeter method, the readings of the two wattmeters are 500W, 500W respectively. The load power factor in a balanced 3-phase 3-wire circuit is:

0.9

0.8

0.5

1

0.9

0.8

0.5

1

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SSC JE Electrical 2019 with solution SET-1
Find the mutual inductance between two ideally coupled coils of 2H and 8H

4 H

8 H

16 H

2 H

4 H

8 H

16 H

2 H

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SSC JE Electrical 2019 with solution SET-1

SSC JE Electrical 2019 with solution SET-1 Identify the INCORRECT statement with regards to synchronous motors

SSC JE Electrical 2019 with solution SET-1 What is the reason behind using a centrifugal switch in a single-phase induction motor?

SSC JE Electrical 2019 with solution SET-1 Two decimal coils A and B of 1000 turns each lies in the parallel plane such that 80% of the flux produced by one coil links with the other. If a current of 5A flowing in A produces a flux of 0.05 mWb, then the flux linking with coil B is:

SSC JE Electrical 2019 with solution SET-1 _______is a tube that brings water to turbines

SSC JE Electrical 2019 with solution SET-1 In the two wattmeter method, the readings of the two wattmeters are 500W, 500W respectively. The load power factor in a balanced 3-phase 3-wire circuit is:

SSC JE Electrical 2019 with solution SET-1 Find the mutual inductance between two ideally coupled coils of 2H and 8H

SSC JE Electrical 2019 with solution SET-1
Identify the INCORRECT statement with regards to synchronous motors

SSC JE Electrical 2019 with solution SET-1
What is the reason behind using a centrifugal switch in a single-phase induction motor?

SSC JE Electrical 2019 with solution SET-1
Two decimal coils A and B of 1000 turns each lies in the parallel plane such that 80% of the flux produced by one coil links with the other. If a current of 5A flowing in A produces a flux of 0.05 mWb, then the flux linking with coil B is:

SSC JE Electrical 2019 with solution SET-1
_______is a tube that brings water to turbines

SSC JE Electrical 2019 with solution SET-1
In the two wattmeter method, the readings of the two wattmeters are 500W, 500W respectively. The load power factor in a balanced 3-phase 3-wire circuit is:

SSC JE Electrical 2019 with solution SET-1
Find the mutual inductance between two ideally coupled coils of 2H and 8H