Related Questions

While comparing magnetic and electric circuits, the flux of magnetic circuit is compared with which parameter of electrical circuit?
A E.M.F.
B Current
C Current density
D Conductivity
The unit of magnetic flux is
A Henry
B Weber
C Ampere-turn/weber
D Ampere/metre
Which of the following is capable of acting both as an acid flux as well as a basic flux in the metal extraction from its ore?
A Silica
B Lime
C Alumina
D Fluorite
Heat flux increases with temperature drop beyond the Leiden frost point in the plot of heat flux vs. temperature drop for a boiling liquid, because
A Convection becomes important
B Conduction becomes important
C Radiation becomes important
D Sub-cooled boiling occurs
In a particular type of welding, flux is prepared in the form of a coarse powder and granulated flux is spread over the joint. What is this type of welding process called?
A Electric arc welding
B Submerged arc welding
C MIG welding
D TIG welding
Which of the following statement holds true for the divergence of electric and magnetic flux dendities?
A Both are zero
B These are zero for static flux dendities but non-zero for time -varying flux dendities
C It is zero for electric flux densities
D It is zero for magnetic flux densities
_______ is extensively used for those portions of magnetic circuit which carry steady flux and need superior mechanical properties ?
A Grey cast-iron
B Cast steel
C High carbon steel
D Stainless steel
The property of a material which opposes the creation of magnetic flux in it is known as
A Reluctivity
B Magneto-motive force
C Permeance
D Reluctance
What happens to the MMF when the magnetic flux decreases?
A Increases
B Decreases
C Remains constant
D Becomes zero
The useful magnetic flux obtainable from any closed surface is
A Unity
B Constant
C Both A and B
D None of the above

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