Related Questions

Ferrites are materials.
A paramagnetic
B diamagnetic
C ferromagnetic
D none of the above
Ferrites are a sub-group of
A non-magnetic materials
B ferro-magnetic materials
C paramagnetic materials
D ferri-magnetic materials
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
A rectangular magnet of magnetic moment M is cut into two piece of same length, the magnetic moment of each piece will be
A M
B $$\frac{{\text{M}}}{2}$$
C 2 M
D $$\frac{{\text{M}}}{4}$$
How does the magnetic compass needle behave in a magnetic field?
A It assures a position right angle to magnetic field
B It starts rotating
C It assures a position which follows a line of magnetic flux
D None of the above
If a copper disc is rotated rapidly below a freely suspended magnetic needle, the magnetic needle shall start rotating with a velocity
A less than that of disc but in opposite direction
B equal to that of disc and in the same direction
C equal to that of disc and in the opposite direction
D less than that of disc and in the same direction
Velocity of liquid hydrocarbon fuels in a pipeline can not be measured by magnetic flowmeters, because their __________ is very low/small.
A Thermal conductivity
B Electrical conductivity
C Specific gravity
D Electrical resistivity
Inspection of surface and sub-surface cracks in non-magnetic alloys is done by __________ testing method.
A X-ray
B Magnetic particle
C Dye penetrant
D Ultrasonic
A magnetic material becomes __________ above the Curie temperature.
A Ferromagnetic
B Diamagnetic
C Paramagnetic
D None of these
Electro-magnetic spectrum range, which is important for radiation varies from __________ microns.
A 1 to 100
B 0.5 to 50
C 10 to 100
D 100 to 1000

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