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ECAT Physics Chapter 14 Electromagnetism Online Test MCQs With Answers
Question # 1
The SI unit of magnetic permeability is
Choose an answer
WB A
-1
m
-1
WB mA
-1
WB Am
-1
None of these
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Question # 2
A current carrying conductor sets up its own:
Choose an answer
Electric field
Nuclear field
Magnetic field
Both (A) and (C)
All of these
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Question # 3
A full-scale deflection is obtained in a galvanometer with a current of few
Choose an answer
ampere
volts
milliampere
ohm
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Question # 4
The SI unit of magnetic flux is
Choose an answer
NmA
-2
NmA
-1
NAm
-1
Nm
2
A
-1
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Question # 5
The SI unit of magnetic induction is tesla which is equal to
Choose an answer
Newton/ampere-meter or N/A-m
Newton/ampere
2
-meter or N/A
2
-m
Newton/ampere
2
-meter
2
or N/A
2
-m
2
Newton/ampere
2
-meter
2
or N/A
2
-m
2
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Question # 6
F = I(L x B) is a
Choose an answer
vector
scalar
unit vector
none of these
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Question # 7
Centripetal force for electron is given by
Choose an answer
mv
2
/ r
mv / r
2
mv
2
/ r
mr
2
/ v
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Question # 8
The force acting on a charge moving in a magnetic field
Choose an answer
is perpendicular to the both magnetic field and direction of motion
is proportional to the magnetic of charges
vanishes when the motion is directly opposite to the direction of field
all of the above
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Question # 9
In a moving coil galvanometer, the deflecting couple depends upon
Choose an answer
area of the coil
number of turns of coil
value of magnetic field
all of the above
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Question # 10
The gavanometer constant of a moving coil galvanometer is given by
Choose an answer
K=BAN/C
K=BN/CA
K=NAC/B
K=C/BAN
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Question # 11
The SI unit of magnetic induction is
Choose an answer
Gauses
Tesla
Weber
Weber
2
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Question # 12
The vector representation of force experience give the direction of
Choose an answer
magnetic field
current
length of conductor
force
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Question # 13
Magnetic flux passing through a element whose vector area makes an angle
0º with lines of magnetic force is:
Choose an answer
BA
CosѲ
Zero
BA
BA sin
Ѳ
None of these
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Question # 14
The force experienced by an electron projected in a magnetic field B with a velocity V is given by
Choose an answer
F=e(V x B)
F= -e(V x B)
F= e(B x V)
Both a and c
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Question # 15
The galvanometer can be made sensitive if the value of the factor C/BAN is
Choose an answer
constant
small
large
none of these
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Question # 16
In the expression of force experienced by electron, the direction of both
v
and
B
are
Choose an answer
parallel
zero
perpendicular
none of them
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