A part an alternator winding consist of eight coils in series, each having an emf of 20 V rms induced in it. Coils are placed in successive slots and between each slot and the next, there is an electrical phase displacement of 30°. Find the emf of eight coils in series

Electrical Machines
A part an alternator winding consist of eight coils in series, each having an emf of 20 V rms induced in it. Coils are placed in successive slots and between each slot and the next, there is an electrical phase displacement of 30°. Find the emf of eight coils in series

76.91 V.

56.91 V.

66.91 V.

86.91 V.

76.91 V.

56.91 V.

66.91 V.

86.91 V.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Copper brushes in DC machine are used

None of these

where low voltage and high currents are involved.

where high voltage and low current.

in both of above cases.

None of these

where low voltage and high currents are involved.

where high voltage and low current.

in both of above cases.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In speed control of DC shunt motor by varying field flux, what may be the value of field regulator?

100 ohm

2 ohm.

0.2 ohm

10 ohm

100 ohm

2 ohm.

0.2 ohm

10 ohm

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In an induction motor, the no-load slip is generally equal to

1.5 %.

zero.

4 %.

less than 1 %.

1.5 %.

zero.

4 %.

less than 1 %.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Which of the following methods of speed control is not affected through stator side?

Change of supply frequency.

Change of supply voltage.

Change of rotor resistance.

Change of number of pole.

Change of supply frequency.

Change of supply voltage.

Change of rotor resistance.

Change of number of pole.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Ward Leonard control is provides speed control

Below rated speed.

Above rated speed.

In both direction.

In one direction only.

Below rated speed.

Above rated speed.

In both direction.

In one direction only.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines

Electrical Machines A part an alternator winding consist of eight coils in series, each having an emf of 20 V rms induced in it. Coils are placed in successive slots and between each slot and the next, there is an electrical phase displacement of 30°. Find the emf of eight coils in series

Electrical Machines Copper brushes in DC machine are used

Electrical Machines In speed control of DC shunt motor by varying field flux, what may be the value of field regulator?

Electrical Machines In an induction motor, the no-load slip is generally equal to

Electrical Machines Which of the following methods of speed control is not affected through stator side?

Electrical Machines Ward Leonard control is provides speed control

Electrical Machines
A part an alternator winding consist of eight coils in series, each having an emf of 20 V rms induced in it. Coils are placed in successive slots and between each slot and the next, there is an electrical phase displacement of 30°. Find the emf of eight coils in series

Electrical Machines
Copper brushes in DC machine are used

Electrical Machines
In speed control of DC shunt motor by varying field flux, what may be the value of field regulator?

Electrical Machines
In an induction motor, the no-load slip is generally equal to

Electrical Machines
Which of the following methods of speed control is not affected through stator side?

Electrical Machines
Ward Leonard control is provides speed control