Physics-
General
Easy
Question
Figure shows a square loop 
with edge length 
. The resistance of the wire 
is 
and that of 
is 
. The value of magnetic field at the centre of the loop assuming uniform wire is
The correct answer is:
According to question, resistance of wire is twice that of wire . Hence current flowing through is half that of 
. Also 
and 
Magnetic field at centre
due to wire 
and 
(part 1 and 2) 
And magnetic field at centre due to wires 
and 
Also 
. So 
Hence net magnetic field at centre
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