Which of following methods are suitable for the speed control of squirrel cage induction motor? 1. Voltage control. 2. Frequency control. 3. Pole changing method. 4. Rotor resistance control select the correct answer using the codes given below:-

Electrical Machines
Which of following methods are suitable for the speed control of squirrel cage induction motor? 1. Voltage control. 2. Frequency control. 3. Pole changing method. 4. Rotor resistance control select the correct answer using the codes given below:-

2 and 4.

1, 3 and 4.

2, 3 and 4.

1, 2 and 3.

2 and 4.

1, 3 and 4.

2, 3 and 4.

1, 2 and 3.

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Electrical Machines
When a short circuit test on a transformer is performed at 25 V, 50 Hz, the drawn current is I1. If the test is performed by 25 V and 25 Hz and power drawn current is I2, then

None of these

I1 < I2

I1 = I2

I1 > I2

None of these

I1 < I2

I1 = I2

I1 > I2

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Electrical Machines
The constant losses in transformer is/are

both 2 and 3.

hysteresis loss.

copper loss.

eddy current loss.

both 2 and 3.

hysteresis loss.

copper loss.

eddy current loss.

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Electrical Machines
A 2 pole synchronous machine is operating at 3000 rpm. Find the relation between electrical angular momentum (ωe) and mechanical angular momentum (ωm) ?

ωe = ωm

ωe = 4*ωm

ωe = 2*ωm

ωe = 1/2*ωm

ωe = ωm

ωe = 4*ωm

ωe = 2*ωm

ωe = 1/2*ωm

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Electrical Machines
In 3 - ÃŽÂ¦ induction motor some times copper bars are placed deep in the rotor to

improve starting torque.

reduce copper loss.

improve power factor.

improve efficiency.

improve starting torque.

reduce copper loss.

improve power factor.

improve efficiency.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
For an ideal transformer the winding should have

equal resistance on primary and secondary side

minimum resistance on primary side and maximum resistance on secondary side

no ohmic resistance on either side

maximum resistance on primary side and least resistance on secondary side

equal resistance on primary and secondary side

minimum resistance on primary side and maximum resistance on secondary side

no ohmic resistance on either side

maximum resistance on primary side and least resistance on secondary side

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines

Electrical Machines Which of following methods are suitable for the speed control of squirrel cage induction motor? 1. Voltage control. 2. Frequency control. 3. Pole changing method. 4. Rotor resistance control select the correct answer using the codes given below:-

Electrical Machines When a short circuit test on a transformer is performed at 25 V, 50 Hz, the drawn current is I1. If the test is performed by 25 V and 25 Hz and power drawn current is I2, then

Electrical Machines The constant losses in transformer is/are

Electrical Machines A 2 pole synchronous machine is operating at 3000 rpm. Find the relation between electrical angular momentum (ωe) and mechanical angular momentum (ωm) ?

Electrical Machines In 3 - ÃŽÂ¦ induction motor some times copper bars are placed deep in the rotor to

Electrical Machines For an ideal transformer the winding should have

Electrical Machines
Which of following methods are suitable for the speed control of squirrel cage induction motor? 1. Voltage control. 2. Frequency control. 3. Pole changing method. 4. Rotor resistance control select the correct answer using the codes given below:-

Electrical Machines
When a short circuit test on a transformer is performed at 25 V, 50 Hz, the drawn current is I1. If the test is performed by 25 V and 25 Hz and power drawn current is I2, then

Electrical Machines
The constant losses in transformer is/are

Electrical Machines
A 2 pole synchronous machine is operating at 3000 rpm. Find the relation between electrical angular momentum (ωe) and mechanical angular momentum (ωm) ?

Electrical Machines
In 3 - ÃŽÂ¦ induction motor some times copper bars are placed deep in the rotor to

Electrical Machines
For an ideal transformer the winding should have