Related Questions

To avoid the effect of stray magnetic field in A.C. bridges we can use
A magnetic screening
B Wagner earthing device
C wave filters
D any of the above
The working of a meter is based on the use of a permanent magnet. In order to protect the meter functioning from stray magnetic fields
A meter is surrounded by strong magnetic fields
B a soft iron shielding is used
C a plastic shielding is provided
D a shielding of anon-magnetic material is used
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
Your..... remarks spoil the effect of your speech; try not to stray from your subject .
A digressive
B disingenuous
C discerning
D demoniac
Your ........ remarks spoil the effect of your speech ; try not to stray from your subject.
A digressive
B enigmatic
C persistent
D derogatory
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 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
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
What happens to the MMF when the magnetic flux decreases?
A Increases
B Decreases
C Remains constant
D Becomes zero

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