Magnetic Effects Of Current Question 61
Question: 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
Options:
4 B
B) 16 B
C) $ B/2 $
D) $ B/4 $
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Answer:
Correct Answer: B
Solution:
$ {B}’=n^{2}B\Rightarrow {B}’={{(4)}^{2}}B=16B $
BETA
