alleryStart learning →A single circular loop of radius 5 cm carries 2 A. What is the field at its centre?
A1.26 x 10^-5 T
B5 x 10^-5 T
C2.5 x 10^-6 T
D2.5 x 10^-5 T
Answer & Solution
Correct answer: D. 2.5 x 10^-5 T
B = mu0 I/(2R) = 4 pi x 10^-7 x 2/0.1 = 2.5 x 10^-5 T.
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