A series generator is connected in series to a feeder having 0.5Ω resistance to boost the voltage. The induced voltage is given by Eg = 0.6Ia, Ra = 0.2Ω and Rs = 0.3Ω. Find the voltage boosted by the generator, when delivering 400 Amp?

Electrical Machines
A series generator is connected in series to a feeder having 0.5Ω resistance to boost the voltage. The induced voltage is given by Eg = 0.6Ia, Ra = 0.2Ω and Rs = 0.3Ω. Find the voltage boosted by the generator, when delivering 400 Amp?

90 V.

40 V.

30 V.

60 V.

90 V.

40 V.

30 V.

60 V.

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Electrical Machines
A smaller air gap in a polyphase induction motor helps to

increase the starting torque.

reduce the magnetizing current.

reduce the chance of cogging.

reduce the chance of crawling.

increase the starting torque.

reduce the magnetizing current.

reduce the chance of cogging.

reduce the chance of crawling.

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Electrical Machines
Armature reaction in a DC machine

is in the same direction as the main poles.

makes an angle of 90° with the main pole axis.

makes an angle with the main pole axis which is load dependent.

is in direct opposition to the main poles.

is in the same direction as the main poles.

makes an angle of 90° with the main pole axis.

makes an angle with the main pole axis which is load dependent.

is in direct opposition to the main poles.

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Electrical Machines
A generator may loose residual magnetism due to

over excitation.

heating.

any of these.

vibrations.

over excitation.

heating.

any of these.

vibrations.

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Electrical Machines
Consider the following statements : 1. interpole windings are connected in series with armature windings 2. polarity of interpoles must be the same as that of the main poles in advance 3. distortion of the main field under the pole shoes is not affected by the use of interpoles From above, the correct answer is

2 and 3

1 and 2

1 and 3

1 alone

2 and 3

1 and 2

1 and 3

1 alone

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Electrical Machines
An ideal DC generated is one that has _____________ voltage regulation.

zero.

low.

negative.

positive.

zero.

low.

negative.

positive.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines

Electrical Machines A series generator is connected in series to a feeder having 0.5Ω resistance to boost the voltage. The induced voltage is given by Eg = 0.6Ia, Ra = 0.2Ω and Rs = 0.3Ω. Find the voltage boosted by the generator, when delivering 400 Amp?

Electrical Machines A smaller air gap in a polyphase induction motor helps to

Electrical Machines Armature reaction in a DC machine

Electrical Machines A generator may loose residual magnetism due to

Electrical Machines An ideal DC generated is one that has _____________ voltage regulation.

Electrical Machines
A series generator is connected in series to a feeder having 0.5Ω resistance to boost the voltage. The induced voltage is given by Eg = 0.6Ia, Ra = 0.2Ω and Rs = 0.3Ω. Find the voltage boosted by the generator, when delivering 400 Amp?

Electrical Machines
A smaller air gap in a polyphase induction motor helps to

Electrical Machines
Armature reaction in a DC machine

Electrical Machines
A generator may loose residual magnetism due to

Electrical Machines
An ideal DC generated is one that has _____________ voltage regulation.