Losses which occur in rotating electric machines and do not occur in transformers are?

Question

asked Mar 19, 2018 by anonymous

83 views

Please log in or register to answer this question.

2 Answers

← Prev Question Next Question →

Request Answer

Related questions

asked Apr 30, 2018 by anonymous

For protection of rotating machines against lightning surges _______ is used.

For protection of rotating machines against lightning surges _______ is used. (1) lightning arrester (2) capacitor (3) combination of lightning arrester and capacitor (4) lightning conductor and arrester

0 like 0 dislike

3,188 views 1 answer

asked May 8, 2018 by anonymous

The friction losses in Real Transformers are :

The friction losses in Real Transformers are : (A) 0% (B) 5% (C) 25% (D) 50%

0 like 0 dislike

1,804 views 1 answer

asked Mar 19, 2018 by anonymous

The efficiencies of transformers compared with that of electric motors of the same power are?

0 like 0 dislike

82 views 2 answers

asked May 3, 2018 by anonymous

The inertia constants of two groups of machines which do not swing together are M1 and M2. The equivalent

The inertia constants of two groups of machines which do not swing together are M1 and M2. The equivalent inertia constant of the system is

0 like 0 dislike

719 views 1 answer

asked Mar 19, 2018 by anonymous

Two transformers do not have equal percentage impedance. This is likely to result in?

Two transformers are connected in parallel. These transformers do not have equal percentage impedance. This is likely to result in?

0 like 0 dislike

52 views 1 answer

asked Mar 19, 2018 by anonymous

What will happen if the transformers working in parallel are not connected with regard to polarity ?

0 like 0 dislike

89 views 2 answers

asked Mar 19, 2018 by anonymous

In a given transformer for a given applied voltage, losses which remain constant irrespective of load changes are?

0 like 0 dislike

87 views 1 answer

asked Mar 19, 2018 by anonymous

Reduction in core losses and increase in permeability are obtained with transformer employing?

0 like 0 dislike

580 views 1 answer

asked Mar 20, 2018 by anonymous

In case of D.C. machines, mechanical losses are primary function of?

0 like 0 dislike

113 views 1 answer

asked Mar 21, 2018 by anonymous

In any rotating machine that part which houses the conductors and in which e.m.f. induced is to be utilised is called?

0 like 0 dislike

99 views 1 answer

asked Mar 19, 2018 by anonymous

If the percentage impedances of the two transformers working in parallel are different, then?

0 like 0 dislike

47 views 1 answer

asked Mar 19, 2018 by anonymous

Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is?

0 like 0 dislike

66 views 1 answer

asked Mar 19, 2018 by anonymous

Distribution transformers are generally designed for maximum efficiency around?

0 like 0 dislike

75 views 1 answer

asked Mar 19, 2018 by anonymous

Power transformers are generally designed to have maximum efficiency around?

0 like 0 dislike

67 views 1 answer

asked Jan 15, 2018 by James

of what use are current and voltage transformers in protective systems

1 like 1 dislike

110 views 1 answer

asked May 1, 2018 by anonymous

In dc machines, the armature windings are placed on the rotor because of the necessity for

In dc machines, the armature windings are placed on the rotor because of the necessity for (1) electromechanical energy conversion (2) generation of voltage (3) commutation (4) development of torque

0 like 0 dislike

159 views 2 answers

asked Mar 25, 2018 by anonymous

Laminated cores, in electrical machines, are used to reduce?

0 like 0 dislike

49 views 1 answer

asked Mar 18, 2018 by anonymous

In a synchronous motor which losses varies with load?

0 like 0 dislike

52 views 1 answer

asked Mar 26, 2018 by anonymous

In DC motor iron losses are occurred in?

0 like 0 dislike

105 views 1 answer

asked Mar 20, 2018 by anonymous

Iron losses in a D.C. machine are independent of variations in?

0 like 0 dislike

97 views 1 answer

asked Mar 10, 2018 by anonymous

What are the losses in a transmission line?

0 like 0 dislike

46 views 0 answers

asked Mar 8, 2018 by anonymous

What are the types of power losses in inductor?

0 like 0 dislike

82 views 1 answer

asked Sep 27, 2017 by anonymous

what are the losses in DC machine?

1 like 0 dislike

72 views 1 answer

asked Mar 19, 2018 by anonymous

Natural oil cooling is used for transformers up to a rating of?

0 like 0 dislike

119 views 1 answer

asked Mar 19, 2018 by anonymous

Short circuit test on transformers is conducted to determine?

0 like 0 dislike

89 views 1 answer

asked Mar 19, 2018 by anonymous

For the parallel operation of single phase transformers it is necessary that they should have?

0 like 0 dislike

98 views 2 answers

asked Mar 19, 2018 by anonymous

Natural air cooling is generally restricted for transformers up to?

0 like 0 dislike

122 views 1 answer

asked Mar 19, 2018 by anonymous

The efficiency of two identical transformers under load conditions can be determined by?

0 like 0 dislike

85 views 1 answer

asked Dec 17, 2017 by anonymous

Why do transformers make noise?

1 like 0 dislike

66 views 1 answer

asked May 7 by anonymous

State advantages of rotating field type alternators.

0 like 0 dislike

50 views 1 answer

asked Aug 25, 2018 by Notes

UNIT 1 fundamentals of AC rotating machine

UNIT 1 fundamentals of AC rotating machine Contents 1.1 Introduction 1.2 Advantages 1.3 Parts of AC machines 1.4 Synchronous speed 1.5 AC winding 1.6 Winding factor (Coil pitch and distributed winding) 1.7 Distribution factor 1.8 EMF equation of alternator or generator 1.9 Numericals 1.10 Harmonic 1.11 Slot harmonics 1.12 Harmonics minimization

0 like 0 dislike

174 views 2 answers

asked Apr 29, 2018 by anonymous

The slip of 400 V, three phase, 4 -pole induction motor when rotating at 1440 rpm is

0 like 0 dislike

133 views 1 answer

asked Aug 19, 2017 by anonymous

what is mean by rotating transformer ?

0 like 0 dislike

70 views 1 answer

asked May 22, 2018 by anonymous

Which of the following are constant losses in Transformers?

Which of the following are constant losses in Transformers? (1) Winding losses (2) Core losses (3) Both Winding & core losses (4) None of these

0 like 0 dislike

54 views 1 answer

asked Apr 29, 2018 by anonymous

Which of the following is the advantage of using CRGO steel in transformers?

Which of the following is the advantage of using CRGO steel in transformers? A) High magnetic flux density B) Low permeability C) Both A and B D) None of these

0 like 0 dislike

74 views 2 answers

asked Sep 22, 2018 by anonymous

Explain following techniques related to energy conservation in transmission and distribution system. (i) By balancing phase currents (ii) Variable technical losses (I2R losses).

0 like 0 dislike

96 views 1 answer

asked May 8, 2018 by anonymous

In a transmission line if booster transformers are to be used, preferred location will be

In a transmission line if booster transformers are to be used, preferred location will be (A) At the receiving end (B) At the sending end (C) At the intermediate point (D) Anywhere in the line

0 like 0 dislike

188 views 1 answer

asked Mar 20, 2018 by anonymous

Brushes of D.C. machines are made of?

0 like 0 dislike

43 views 1 answer

asked Mar 20, 2018 by anonymous

Exciters of synchronous machines are?

0 like 0 dislike

50 views 1 answer

asked Sep 8, 2018 by anonymous

"Hydro electric power station are not perennial power station". Justify.

0 like 0 dislike

45 views 1 answer

asked Apr 29, 2018 by anonymous

Which of the following can reduce the Eddy current losses?

Which of the following can reduce the Eddy current losses? A) By making the core of a stack of plates electrically insulated from each other B) By making the core of solid block C) By increasing the applied voltage D) None of these

0 like 0 dislike

59 views 1 answer

asked Aug 17, 2019 by anonymous

State which electric motors are generally used in electro agro systems with reason.

0 like 0 dislike

56 views 1 answer

asked Mar 25, 2018 by anonymous

Silicon steel is used in electrical machines because it has?

0 like 0 dislike

107 views 1 answer

asked Mar 20, 2018 by anonymous

In D.C. machines the residual magnetism is of the order of?

0 like 0 dislike

234 views 1 answer

asked Mar 20, 2018 by anonymous

In D.C. machines fractional pitch winding is used?

0 like 0 dislike

219 views 1 answer

asked May 8, 2018 by anonymous

Which of the following connection of transformers will give highest value of secondary voltage ?

Which of the following connection of transformers will give highest value of secondary voltage ? (A) Delta primary delta secondary (B) Delta primary star secondary (C) Star primary star secondary (D) Star primary delta secondary

0 like 0 dislike

73 views 1 answer

asked Sep 22, 2018 by anonymous

Explain the “mitigation of power theft” and “faulty meter replacement” for energy conservation techniques to reduce commercial losses.

0 like 0 dislike

60 views 1 answer

asked Mar 10, 2018 by anonymous

Explain the electrical losses of magnetic materials used for the cores of inductors and transformer.

0 like 0 dislike

62 views 0 answers

asked May 8, 2018 by anonymous

Core type transformers are popular in___________.

Core type transformers are popular in___________. (A) High voltage applications (B) Low voltage applications (C) All of the above (D) None of the above

0 like 0 dislike

46 views 1 answer

asked Mar 21, 2018 by anonymous

Instrument transformers are?

0 like 0 dislike

53 views 1 answer

anonymous · Answer 1 · 2018-03-19T20:29:03+0000

Losses which occur in rotating electric machines and do not occur in transformers are friction and windage losses.

prasadnani · Answer 2 · 2019-05-18T03:47:11+0000

answered May 18, 2019 by prasadnani

Friction losses windage losses

Losses which occur in rotating electric machines and do not occur in transformers are?

Please log in or register to add a comment.

Please log in or register to answer this question.

2 Answers

Please log in or register to add a comment.

Please log in or register to add a comment.

Related questions