MCQs | Magnetic Field Q & A | Electrical Engineering Questions
Question And Answer related to magnetic field is provided in this post which will helpful in GATE examination and also in all type of competitive exams.
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| MCQs | Magnetic Field Q & A | Electrical Engineering Questions |
Q.1
Tesla is a unit of
(a)field strength
(b)inductance
(c)flux density
(d)flux.
Ans.
(c)flux density
Q.2
A permeable substance is one
(a)which is a good conductor
(b)which is a bad conductor
(c)which is a strong magnet
(d)through which the magnetic lines of
force can pass very easily
Ans.
(d)through which the magnetic lines of
force can pass very easily
Q.3
The materials having low retentively
are suitable for making
(a)weak magnets
(b)temporary magnets
(c)permanent magnets
(d)none of the above
Ans.
(b)temporary magnets
Q.4
A magnetic field exists around
(a)iron
(b)copper
(c)aluminum
(d)moving charges
Ans.
(d)moving charges
Q.5
A magnet does not attract
(a)cobalt
(b)nickel
(c)copper
(d)iron
Ans.
(c)copper
Q.6
Aluminum and. platinum are_____
materials.
(a)ferromagnetic
(b)diamagnetic
(c)paramagnetic
(d)insulating
Ans.
(c)paramagnetic
Q.7
Ferrites are _____materials.
(a)paramagnetic
(b)diamagnetic
(c)ferromagnetic
(d)none of the above
Ans.
(c)ferromagnetic
Q.8
Air gap has......reluctance as compared
to iron or steel path
(a)little
(b)lower
(c)higher
(d)zero
Ans.
(b)lower
Q.9
The direction of magnetic lines of force
is
(a)from south pole to north pole
(b)from north pole to south pole
(c)from one end of the magnet to
another
(d)none of the above
Ans.
(b)from north pole to south pole
Q.10
Which of the following is a vector quantity?
(a)Relative permeability
(b)Magnetic field intensity
(c)Flux density
(d)Magnetic potential
Ans.
(b)Magnetic field intensity
Q.11
The two conductors of a transmission
line carry equal current I in opposite
directions. The force on each conductor
is
(a)proportional to I
(b)proportional to (I)^2
(c)proportional to distance between
the conductors
(d)inversely proportional to I
Ans.
(b)proportional to (I)^2
Q.12
A material which is slightly repelled by
a magnetic field is known as
(a)ferromagnetic material
(b)diamagnetic material
(c)paramagnetic material
(d)conducting material
Ans.
(b)diamagnetic material
Q.13
When an iron piece is placed in a mag-
netic field
(a)the magnetic lines of force will bend
away from their usual paths in
order to go away from the piece
(b)the magnetic lines of force will bend
away from their usual paths in
order to pass through the piece
(c)the magnetic field. will not be affected
(d)the iron piece will break
Ans.
(b)the magnetic lines of force will bend
away from their usual paths in
order to pass through the piece
Q.14
Fleming's left hand rule is used to find
(a)direction of magnetic field due to
current carrying conductor
(b)direction of flux in a solenoid
(c)direction of force on a current car-
rying conductor in a magnetic field
(d)polarity of a magnetic pole
Ans.
(c)direction of force on a current car-
rying conductor in a magnetic field
Q.15
The ratio of intensity of magnetization.
to the magnetization force is known as
(a)flux density
(b)susceptibility
(c)relative permeability
(d)none of the above
Ans.
(b)susceptibility
