Questions
One metre length of wire carries a constant current. The wire is bent to form a circular loop. The magnetic field at the centre of this loop is B. The same is now bent to form a circular loop of smaller radius to have four turns in the loop. The magnetic field at the centre of this new loop is
detailed solution
Correct option is B
B'=n2B ⇒ B'=42 B = B'=16BTalk to our academic expert!
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