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Tardigrade
Question
Physics
In the given figure, the magnetic field at ‘O’.
Q. In the given figure, the magnetic field at ‘
O
’.
4944
154
KCET
KCET 2020
Moving Charges and Magnetism
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A
4
3
r
μ
o
I
+
4
π
r
μ
o
I
26%
B
10
3
r
μ
o
I
−
4
π
r
μ
o
I
10%
C
8
3
r
μ
o
I
+
4
π
r
μ
o
I
49%
D
8
3
r
μ
o
I
−
4
π
r
μ
o
I
15%
Solution:
B
net
=
B
1
+
B
2
+
B
3
=
8
3
r
μ
0
I
+
4
π
r
μ
0
I
+
0