Related Questions

Substances which have permeability less than the permeability of free space are known as
A Ferromagnetic
B Paramagnetic
C Diamagnetic
D Bipolar
Permeability in a magnetic circuit corresponds to_________ in an electric circuit.
A Resistance
B Resistivity
C Conductivity
D Conductance
The permeability of a core material is an indication of the ability of the material to establish a magnetic field.
A True
B False
Magnetic permeability of iron is increased by its
A Decarburising
B Alloying with cobalt
C Purification
D Alternate heating & cooling
Which one of the following kinds of materials has the lowest permeability?
A A diamagnetic material
B A paramagnetic material
C A feiTomagnetic material
D All of the above
E None of the above
Which one of the following kinds of materials has the highest permeability?
A A diamagnetic material
B A ferromagnetic material
C A paramagnetic material
D All of the above
E None of the above
The relative permeability of materials is not constant.
A diamagnetic
B paramagnetic
C ferromagnetic
D insulating
Paramagnetic materials have relative permeability
A slightly less than unity
B equal to unity
C slightly more than unity
D equal to that ferromagnetic mate rials
There are five persons sitting on a bench. Blue eyed lady sitting in the middle is my mother. At the extreme left, the man with grey hair is my maternal uncle. Lady sitting at the extreme right is having a pimple on her nose and is the wife of person who is sitting between blue eyed lady and grey haired man and has a pointed nose. A lady having marks on her face is the younger sister of the blue eyed lady and sitting on the remaining fifth place. The person having a pointed nose is the son of the blue eyed lady. What is the lady having marks on her face to the man sitting at extreme left ?
A Wife
B Maternal Aunt
C Sister
D Sister-in-law
Perminvar alloy having constant permeability is an alloy of
A Nickel, copper and iron
B Nickel, copper and zinc
C Copper, nickel and antimony
D Iron, zinc and bismuth

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