The magnetic field at a distance r from a long wire carrying current i – McqOptions

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1.	The magnetic field at a distance r from a long wire carrying current i is 0.4 Tesla. The magnetic field at a distance 2r is [CBSE PMT 1992; DPMT 2004]
A.	0.2 Tesla
B.	0.8 Tesla
C.	0.1 Tesla
D.	1.6 Tesla
Answer» B. 0.8 Tesla

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