Magnetic Effects Of Current Question 106
Question: When a certain length of wire is turned into one circular loop, the magnetic induction at the centre of coil due to some current flowing is $ B_{1} $ If the same wire is turned into three loops to make a circular coil, the magnetic induction at the center of this coil for the same current will be [MP PMT 2002]
Options:
A) $ B_{1} $
B) $ 9,B_{1} $
C) $ 3,B_{1} $
D) $ 27,B_{1} $
Show Answer
Answer:
Correct Answer: B
Solution:
$ {B}’=n^{2}B={{(3)}^{2}}B=9B $
BETA
