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CGPET 2018 Solved Paper
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© examsnet.com
Question : 8
Total: 150
Two thin metallic wires lie on
X
and
Y
-axes and both carry the same current as shown in the figure below.
A
B
and
C
D
are the two lines making angles
45
°
with the axes and the origin of axes is
O
. The magnetic field will be zero
on the line
A
B
on the line
C
D
only on part
O
B
of the line
A
B
only on part
O
C
of the line
C
D
Validate
Solution:
According to Maxwell's right hand rule, direction of magnetic field due to
+
X
-axis will be outward and due to
+
Y
-axis will be inward. So, the magnetic field will cancel out each other on the line
O
B
.
© examsnet.com
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