The magnetic induction at a point P which is at a distance 4 cm from a long current carrying wire is 10^-8 . then what is the field of induction at a distance 12 cm( same value of current)
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B= (uo/4pi). 2i/R
B2/B1 = R1/R2 = 0.04/0.12= 1/3
Therefore, B2 = 1/3 x 10^-8 = 3.33 x 10^-9 Tesla
sjhari:
Thank you
very crisp
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