An 8 pole DC generator has 500 armature conductors and useful flux per pole of 0.065 Wb. What will be the emf generated if it is lap connected and runs at 1000 rpm. What must be the speed at which it is driven to produce the same emf if it is wave wound?

Electrical Machines
An 8 pole DC generator has 500 armature conductors and useful flux per pole of 0.065 Wb. What will be the emf generated if it is lap connected and runs at 1000 rpm. What must be the speed at which it is driven to produce the same emf if it is wave wound?

541.67V, 200 rpm.

2166.67V, 230 rpm.

2166.67V, 270 rpm.

541.67V, 250 rpm.

541.67V, 200 rpm.

2166.67V, 230 rpm.

2166.67V, 270 rpm.

541.67V, 250 rpm.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In the 3-phase induction motor, the resultant flux is of a constant nature and is

3/2 times maximum value of flux due to any phase

3 times maximum value of flux due to any phase

1/2 times maximum value of flux due to any phase

equal to φm, where φm is the maximum flux due to any phase

3/2 times maximum value of flux due to any phase

3 times maximum value of flux due to any phase

1/2 times maximum value of flux due to any phase

equal to φm, where φm is the maximum flux due to any phase

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A 3 - ÃŽÂ¦, 4 pole IM is supplied from a 50 Hz source. Calculate rotor frequency when rotor runs 600 rpm?

35 Hz.

30 Hz.

20 Hz.

Can be determined.

35 Hz.

30 Hz.

20 Hz.

Can be determined.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A crusher is equipped with

DC shunt motor.

Synchronous motor.

Reluctance motor.

Slip ring induction motor.

DC shunt motor.

Synchronous motor.

Reluctance motor.

Slip ring induction motor.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
When applied rated voltage per phase is reduce to one half, the starting torque of three phase squirrel cage induction motor becomes

twice the initial value

4 time the initial value

1/2 of the initial value

1/4 of the intial value

twice the initial value

4 time the initial value

1/2 of the initial value

1/4 of the intial value

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Demagnetization effects which of the following?

reduction in main field flux

commutation

both B and C

reduces the terminal voltage

reduction in main field flux

commutation

both B and C

reduces the terminal voltage

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines

Electrical Machines An 8 pole DC generator has 500 armature conductors and useful flux per pole of 0.065 Wb. What will be the emf generated if it is lap connected and runs at 1000 rpm. What must be the speed at which it is driven to produce the same emf if it is wave wound?

Electrical Machines In the 3-phase induction motor, the resultant flux is of a constant nature and is

Electrical Machines A 3 - ÃŽÂ¦, 4 pole IM is supplied from a 50 Hz source. Calculate rotor frequency when rotor runs 600 rpm?

Electrical Machines A crusher is equipped with

Electrical Machines When applied rated voltage per phase is reduce to one half, the starting torque of three phase squirrel cage induction motor becomes

Electrical Machines Demagnetization effects which of the following?

Electrical Machines
An 8 pole DC generator has 500 armature conductors and useful flux per pole of 0.065 Wb. What will be the emf generated if it is lap connected and runs at 1000 rpm. What must be the speed at which it is driven to produce the same emf if it is wave wound?

Electrical Machines
In the 3-phase induction motor, the resultant flux is of a constant nature and is

Electrical Machines
A 3 - ÃŽÂ¦, 4 pole IM is supplied from a 50 Hz source. Calculate rotor frequency when rotor runs 600 rpm?

Electrical Machines
A crusher is equipped with

Electrical Machines
When applied rated voltage per phase is reduce to one half, the starting torque of three phase squirrel cage induction motor becomes

Electrical Machines
Demagnetization effects which of the following?