61 views

1 Answer

Answer :

The rotor of a hysteresis motor is made of chrome steel.

Like 0 like

Please log in or register to answer this question.

Related questions

76 views

Last Answer : In a hysteresis motor, the rotor must have retentivity.

1 answer
87 views

Last Answer : Locked rotor current of a shaded pole motor is slightly more than full load current.

1 answer
210 views

Description : Describe with neat sketch working of hysteresis motor.

Last Answer : Working: When stator is energized with single phase ac supply, rotating magnetic field is produced because of starting (auxiliary) and main windings, which remain in circuit permanently. The ... the principle of magnetic locking this motor either rotates at synchronous speed or not at all.

1 answer
123 views

Last Answer : A hysteresis motor works on the principle of hysteresis loss.

1 answer
235 views

Last Answer : The direction of rotation of an hysteresis motor is determined by position of shaded pole with respect to main pole.

1 answer
180 views

Description : Explain with neat circuit diagrams the procedures to perform no load and blocked rotor tests on three phase induction motor.

0 answers
171 views

Description : The rotor impedance of a slip ring induction motor is (0.1 + j0.6)Ohm/ ph . The resistance/ph to be inserted into rotor to get maximum torque at starting should be

Last Answer : The rotor impedance of a slip ring induction motor is (0.1 + j0.6)Ohm/ ph . The resistance/ph to be inserted into rotor to get maximum torque at starting should be 0.5 Ohm

1 answer
598 views

Description : Ratio of the rotor reactance X to the rotor resistance R for a two-phase servo motor (A) is equal to that of a normal induction motor (B) is less than that of a normal induction motor (C) ... than that of a normal induction motor (D) may be less or greater than that of a normal induction motor

Last Answer : C

2 answers
91 views

Last Answer : The rotor developed by a single-phase motor at starting is zero.

1 answer
188 views

Description : An electric motor in which both stator field and rotor rotates with same speed is called?

Last Answer : An electric motor in which both stator field and rotor rotates with same speed is called synchronous motor.

1 answer
135 views

Description : What is the rotor of a motor?

Last Answer : Rotor is the rotating or moving part in motor and generator.

1 answer
132 views

Description : A synchronous motor can be made self starting by providing?

Last Answer : A synchronous motor can be made self-starting by providing damper bar.

1 answer
308 views

Description : The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as?

Last Answer : The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as pull-in torque.

1 answer
118 views

Last Answer : As hysteresis motors are free from mechanical and magnetic vibrations therefore these are considered as suitable for sound equipment.

1 answer
305 views

Description : 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

Last Answer : 3  Commutation

2 answers
81 views

Description : What is magnetic hysteresis? What is the cause of hysteresis?

Last Answer : Magnetic hysteresis: When a magnetic material is subjected to cycle of magnetization, it is found that flux density (B) in the material lags behind applied magnetizing force (H). This ... the movement of orientation, due to which the flux density lags behind the magnetic field intensity.

1 answer
98 views

Description : State the factors affecting hysteresis loss.

Last Answer : i) Flux density ii) Frequency iii) Volume of the magnetic material iv) Nature of magnetic material

1 answer
720 views

Description : Explain the hysteresis loop of a magnetic material with neat diagram.

Last Answer : Hysteresis loop of magnetic material:  The circuit arrangement for plotting the hysteresis loop is shown in figure given below. The electromagnetic part consists of a coil wound on the iron ring ... one magnetic reversal is called hysteresis loop. Meaning of hysteresis is to lag behind.

1 answer
127 views

Description : Hysteresis is commonly found in ______ A) ferromagnetic materials B) ferroelectric materials C) both A and B D) none of these

Last Answer : Hysteresis is commonly found in ______ A) ferromagnetic materials B) ferroelectric materials C) both A and B D) none of these

1 answer
76 views

Description : The term hysteresis is associated with (A) On-Off control (B) P-I control (C) Feed forward control (D) Ratio control

Last Answer : The term hysteresis is associated with On-Off control

1 answer
645 views

Description : If the area of hysteresis loop of a material is large, the hysteresis loss in this material will be?

Last Answer : If the area of hysteresis loop of a material is large, the hysteresis loss in this material will be large.

1 answer
421 views

Description : In a magnetic material hysteresis loss takes place primarily due to?

Last Answer : In a magnetic material hysteresis loss takes place primarily due to it high retentivity.

1 answer
3.0k views

Description : What is the difference between eddy current and hysteresis loss?

Last Answer : Loss occurred by magnetising and demagnetising process is called histerisis loss and the current flowed due to the magnetic field produced by the electric field applied is called eddy current losses

1 answer
749 views

Description : Explain hysteresis loss, eddy current loss and skin effect limitations with reference to magnetic material.

Last Answer : Hysteresis loss: Hysteresis loss is a loss which occurs due to the friction of magnetic domain due to the change in magnetic field in ferromagnetic material like iron. Hysteresis loss causes power loss ... loss in transformer is given by, We=Kef2Kf2Bm2watts Skin effect limitations:

1 answer
166 views

Description : Brushes of DC machine are made up of ?

Last Answer : Brushes of DC machine are made up of carbon.

1 answer
118 views

Description : From which material field coils of DC generator are made of?

Last Answer : Field coils of DC generator are usually made of copper.

1 answer
125 views

Last Answer : The bearings used to support the rotor shafts are generally ball bearings.

1 answer
101 views

Description : Salient pole rotor is use for which speed?

Last Answer : Salient pole rotor is use for low and medium speed prime movers.

1 answer
85 views

Description : Which rotor is use for high speed in turbo alternators?

Last Answer : Non-salient pole rotor is used for high speed in turbo alternators.

1 answer
96 views

Description : In a single-phase induction motor when the rotor is stationary and voltage is applied to the stator, then (A) the flux is constant (B) the flux first decreases and then increases in ... increases and decreases in the opposite direction with the same magnitude (D) current flows through the rotor

Last Answer : In a single-phase induction motor when the rotor is stationary and voltage is applied to the stator, then the flux first decreases and then increases in the same direction

1 answer
2.1k views

Description : A 3-phase, 4-pole, 50Hz induction motor runs at a speed of 1440 rpm. The rotating field produced by the rotor rotates at a speed of ________ rpm with respect to stator field. (A) 1500 (B) 0 (C) 1440 (D) 60

Last Answer : 0

2 answers
183 views

Description : An 8-pole, 50Hz, three-phase induction motor is running at 705rpm and has a rotor copper loss of 5kW. Its rotor input is (A) 5.06 kW (B) 0.3 kW (C) 100 kW (D) 83.33 kW

Last Answer : An 8-pole, 50Hz, three-phase induction motor is running at 705rpm and has a rotor copper loss of 5kW. Its rotor input is 83.33 kW

1 answer
149 views

Last Answer : The rotor slots, in an induction motor, are usually not quite parallel to the shaft because it helps in reducing the tendency of the rotor teeth to remain under the stator teeth.

1 answer
5 views

Description : How To Make Chalking Made Easy

Last Answer : Chalking Made Easy: Simple Instructions for Scrapbookers and Card Designers Chalking is a quick, inexpensive way to add creativity, color, and character to your scrapbooking layouts and other papercrafts. With a ... to experiment. This is where the artist in you is allowed to come out and play!

1 answer
5 views

Description : How Wool is Made

Last Answer : How Wool is Made Wool is the fiber derived from the fleece or the fur of the Caprinae family. This family consists of chamois, goats, serows, sheep and relatives. Wool may is made from ... the final wool fabric. These finishing procedures will determine the warmth, durability and value of the wool.

1 answer
14 views

Description : How Silk is Made

Last Answer : How Silk is Made Silk is made from the fine woven filaments of cocoons of silkworms. There are almost 70 species of silk moths. The most famous is the Bombyx mori. The caterpillar is among ... of each filament, the way each filament is looped and twisted into the silk thread are also considere

1 answer
5 views

Description : How Paper is Made

Last Answer : How Paper is Made Paper is an essential commodity utilized for business and education. Paper is typically made from plant fibres. Most common would be from the fibres of trees. Other materials such as ... done to sift all the unneeded particles of the wood. The cellulose fibres will remain intact.

1 answer
13 views

Description : How Is Glass Made?

Last Answer : How Is Glass Made? Glass is a common household object. It is an amorphous noncrystalline solid that has several applications in our daily lives. Glass is transparent to visible light. This makes it ... filler for rubbers and plastics. It is also used in many coating adhesives, cements, and sealants.

1 answer
5 views

Description : How are Paintballs Made

Last Answer : How are Paintballs Made What is a Paintball? Paintball is a sport in which the aim of the participants is to eliminate people on the other team by shooting at them paintballs. These so-called paintballs ... as soon as the balls have dried up. When ready, the paintballs are packed and moved onwards.

1 answer
8 views

Description : How are Jigsaw Puzzles Made

Last Answer : How are Jigsaw Puzzles Made What is a jigsaw puzzle? A jigsaw puzzle can be described as a puzzle made up of small tiles of different shapes that can interlock with one another. Each of these tiles has ... ready. You can ask anyone to look at the uncut picture and assemble the pieces with its help.

1 answer
7 views

Description : How are Diamonds Made

Last Answer : How are Diamonds Made What is a Diamond? Diamonds are typically formed deep beneath the earth's surface. They are made up of pure carbon which has been placed under immense pressure for millions of years ... , diamonds can be made to grow up to 10 millimeters across and 4.5 millimeters in thickness.

1 answer
7 views

Description : How Electricity is Made ?

Last Answer : How Electricity is Made Electricity is produced when the balance between the protons and electrons of an atom is disrupted by a certain force. It transmits an electrical charge through solid matter. ... as the classic Dutch six-bladed wind mills. These wind mills were used in ancient times.

1 answer
120 views

Description : The IC chips, used in computers, is made of  (1) Iron oxide (2) Silicon (3) Graphite (4) Silica

Last Answer : 2 These are made on silicon wafers which is aa semi conductor. ...

2 answers
196 views

Description : A switch tail ring counter is made by using a single D-FF. The resulting circuit is (A) T-FF (B) D-FF (C) SR-FF (D) JK-FF

Last Answer : A switch tail ring counter is made by using a single D-FF. The resulting circuit is T-FF

1 answer
57 views

Last Answer : Standard resistor is made from maganin.

1 answer
2.7k views

Description : D.C. shunt relays are made of?

Last Answer : D.C. shunt relays are made of many turns of thin wire.

1 answer
106 views

Description : The maximum torque which a synchronous motor will develop at rest for any angular position of the rotor, at rated stator supply voltage and frequency, is known as?

0 answers
245 views

Description : Split phase induction motor

Last Answer : Split phase induction motor : There are two windings used in split phase induction motor. It is a type of single-phase induction motor. There are two winding one is called main winding and ... motor have low starting torque it is used for small fans, blowers, centrifugal pumps, grinders etc.

1 answer
146 views

Description : Describe the reason of using dc series motor for electric trains.

Last Answer : Electric trains require an inverse torque speed characteristics for proper operation. That is a higher torque is required at start (when speed is nil or low) and as the train picks up ... torque - speed characteristics of DC series motors match, these motors are suitable for electric trains

1 answer
497 views

Description : A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net Voltage across armature resistance at the time of plugging will be

Last Answer : A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net Voltage across armature resistance at the time of plugging will be 474 V

1 answer
...