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JEE Advanced 2020 Full Test 6 Paper 1
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© examsnet.com
Question : 4
Total: 54
A wire frame ABCDEF is kept as shown in figure. I am the current in the wire frame.
The direction of magnetic field at 'O' due to the wire frame will be along
(
−
i
∧
−
∧
j
√
2
)
The direction of magnetic field at
P
(
0
,
a
,
0
)
due to wire CD and EF will be along
−
∧
j
The direction of magnetic field at
Q
(
a
,
0
,
0
)
due to wire
E
F
and
C
D
will be along
(
∧
j
)
The direction of magnetic field at
P
(
0
,
a
,
0
)
due to wire
A
F
and
C
B
will be along
(
∧
i
)
Validate
Solution:
Direction of magnetic field at
P
due to
C
D
=
∧
i
×
(
∧
j
+
∧
k
)
√
2
⇒
k
−
∧
j
√
2
Direction of magnetic field at
P
due to
E
F
=
−
∧
i
×
(
∧
j
−
∧
k
)
√
2
⇒
−
k
−
∧
j
√
2
Hence direction will be along
−
hat
j
Direction of magnetic field at 'O' due to upper frame along
−
∧
i
Direction of magnetic field at O due to horizontal frame will be along -
hat
j
© examsnet.com
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