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Hysteresis Loop
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Magnetic Hysteresis and Hysteresis Loss ...
Magnetic Hysteresis and Hysteresis Loss Part I
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Magnetic Hysteresis and Hysteresis Loss Part I
3 mins
Important Questions
What is hysteresis? Define the terms 'coercivity' and 'retentivity' of a ferromagnetic material.
Easy
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>
Magnetic field lines of two magnets are shown in fig. A and fig. B. Select the figure that represents the correct pattern of field lines. Give reasons for
your answer. Also, name the poles of the magnets facing each other.
Medium
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>
State four properties of magnetic field lines.
Medium
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A bar magnet is demagnetized by inserting it inside a solenoid of length
0
.
2
m
,
1
0
0
t
u
r
a
s
, and carrying a current of
5
.
2
A
. The coercivity of the bar magnet is:
Medium
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>
Define magnetic field lines. Describe an activity to draw a magnetic field line outside a bar magnet from one pole to another pole.
Medium
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>
Write two properties of a material suitable for making
(a) a permanent magnet and
(b) an electromagnet
Medium
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>
State the direction of magnetic field in the following case.
Easy
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>
A test
1
.
6
×
1
0
−
1
9
C
b
is moving with velocity
v
=
(
2
i
^
+
3
j
^
)
m/sec is magnetic field
B
=
(
2
i
^
+
3
j
^
)
w
b
/
m
2
.the magnetic force on the test charge:-
Medium
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(a) Draw the pattern of magnetic field lines near a bar magnet placed with its north pole pointing towards the geographic north. Indicate the position of neutral points by marking x.
(b) State whether the magnetic field lines in part (a) represent a uniform magnetic field or non-uniform magnetic field?
Medium
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>
In a permanent magnet at room temperature.
Medium
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>