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Gaurav Seth 5 years, 4 months ago
As conductor is connected with the cell , the potential difference across two paths (two possible paths i.e. one upside and one downside path) is same.
V1 = V2
I1R1=I2R2
I1dl1=I2dl2 (as resistivity and area of cross section same )
Now,
field, due to one path, is opposite due to another part. So magnetic field at the center is

[sin 90 = 1 , i1dl1 = i2dl2]
= 0 (proved)
As conductor is connected with the cell , the potential difference across two paths (two possible paths i.e. one upside and one downside path) is same.
V1 = V2
I1R1=I2R2
I1dl1=I2dl2 (as resistivity and area of cross section same )
Now,
field, due to one path, is opposite due to another part. So magnetic field at the center is

[sin 90 = 1 , i1dl1 = i2dl2]
= 0 (proved)
2Thank You