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Tardigrade
Question
Physics
The magnetic field intensity at the centre of cubical cage of identical wires of length ‘a’ due to a current I flowing as shown in the fiigure is
Q. The magnetic field intensity at the centre of cubical cage of identical wires of length ‘a’ due to a current I flowing as shown in the fiigure is
2295
191
WBJEE
WBJEE 2016
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A
a
21
B
a
21
C
0
D
I/2a
Solution:
For symmetrical current distribution, magnetic field at the centre due to all current carrying conductors will get cancelled. Hence
B
n
e
t
=
0