Magnetic Effects Of Current Question 112
Question: A wire in the form of a circular loop of one turn carrying a current produces a magnetic field B at the centre. If the same wire is looped into a coil of two turns and carries the same current, the new value of magnetic induction at the centre is [CBSE 2002; KCET 2003]
Options:
A) $ 5B $
B) $ 3B $
C) $ 2B $
D) $ 4B $
Show Answer
Answer:
Correct Answer: D
Solution:
$ B’=n^{2}B={{(2)}^{2}}B=4B $
BETA
