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
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
The presence of parallel alignment of magnetic dipole moment is given by which materials?
A Diamagnetic
B Ferromagnetic
C Paramagnetic
D Ferromagnetic
Those magnetic materials are best suited for making armature and transformer cores which have ________permeability and _________hysteresis loss.
A High, high
B Low, high
C High, low
D Low, low
For which of the following materials the net magnetic moment should be zero?
A Diamagnetic materials
B Ferrimagnetic materials
C Antiferromagnetic materials
D Antiferrimagnetic materials
The magnetic materials exhibit the property of magnetisation because of
A orbital motion of electrons
B spin of electrons
C spin of nucleus
D either of these
The materials are a bit inferior conductors of magnetic flux than air.
A ferromagnetic
B paramagnetic
C diamagnetic
D dielectric
Hard magnetic materials have high
A Coercive force
B Residual magnetic induction
C Both A & B
D Neither A nor B

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