Magnetic Effects Of Current Question 121
Question: The magnetic induction at the centre of a current carrying circular of coil radius r, is [J & K CET 2004]
Options:
A) Directly proportional to r
B) Inversely proportional r
C) Directly proportional to r2
D) Inversely proportional to r2
Show Answer
Answer:
Correct Answer: B
Solution:
$ B=\frac{{\mu_{0}}}{4\pi }.\frac{2\pi i}{r}\Rightarrow B\propto \frac{1}{r} $
BETA
