A 4 pole dc motor with armature winding resistance of 0.6 ohm receives a supply of 230 Volt. If the back emf produced during running condition is equal to 210 volt. Calculate the current flowing through the armature at this point.

Electrical Machines
A 4 pole dc motor with armature winding resistance of 0.6 ohm receives a supply of 230 Volt. If the back emf produced during running condition is equal to 210 volt. Calculate the current flowing through the armature at this point.

33.33 Amp.

44.47 Amp.

43 Amp.

29 Amp.

33.33 Amp.

44.47 Amp.

43 Amp.

29 Amp.

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Electrical Machines
No load test on induction motor is conducted to find which of the following losses?

Stator copper loss

Stator core loss

All of these

Rotational loss

Stator copper loss

Stator core loss

All of these

Rotational loss

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Electrical Machines
The armature shaft must be able to with stand

Twisting stains due to transmission of torque.

All of these

Bending moment due to weight of the armature.

Any unbalanced magnetic pull on the armature core.

Twisting stains due to transmission of torque.

All of these

Bending moment due to weight of the armature.

Any unbalanced magnetic pull on the armature core.

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Electrical Machines
For a single phase capacitor start induction motor which of the following is valid?

None of these.

Direction of rotation cannot be changed.

Rotation can be changed by reversing main winding terminals.

Rotation can be changed by interchanging supply terminals.

None of these.

Direction of rotation cannot be changed.

Rotation can be changed by reversing main winding terminals.

Rotation can be changed by interchanging supply terminals.

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Electrical Machines
In a DC motor under constant terminal voltage what is the relation between torque (Te) and power (P)

T∝ P²

T is independent of P

T∝ P

T∝ P³

T∝ P²

T is independent of P

T∝ P

T∝ P³

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Electrical Machines
A 100/10, 50 VA double winding transformer is converted to 100/110 V auto transformer. The rating of auto transformer is

100 VA

500 VA

550 VA

110 VA

100 VA

500 VA

550 VA

110 VA

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Electrical Machines

Electrical Machines A 4 pole dc motor with armature winding resistance of 0.6 ohm receives a supply of 230 Volt. If the back emf produced during running condition is equal to 210 volt. Calculate the current flowing through the armature at this point.

Electrical Machines No load test on induction motor is conducted to find which of the following losses?

Electrical Machines The armature shaft must be able to with stand

Electrical Machines For a single phase capacitor start induction motor which of the following is valid?

Electrical Machines In a DC motor under constant terminal voltage what is the relation between torque (Te) and power (P)

Electrical Machines A 100/10, 50 VA double winding transformer is converted to 100/110 V auto transformer. The rating of auto transformer is

Electrical Machines
A 4 pole dc motor with armature winding resistance of 0.6 ohm receives a supply of 230 Volt. If the back emf produced during running condition is equal to 210 volt. Calculate the current flowing through the armature at this point.

Electrical Machines
No load test on induction motor is conducted to find which of the following losses?

Electrical Machines
The armature shaft must be able to with stand

Electrical Machines
For a single phase capacitor start induction motor which of the following is valid?

Electrical Machines
In a DC motor under constant terminal voltage what is the relation between torque (Te) and power (P)

Electrical Machines
A 100/10, 50 VA double winding transformer is converted to 100/110 V auto transformer. The rating of auto transformer is