Recent questions tagged hysteresis

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.

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.

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

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.

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

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

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.

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.

Last Answer : The rotor of a hysteresis motor is made of chrome steel.

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

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

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

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

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

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: