Magnetic Effects Of Current Question 79
Question: The magnetic induction in air at a point 1cm away from a long wire that carries a current of 1A, will be [BHU 1999]
Options:
A) $ 1\times {{10}^{-5}}T $
B) $ 2\times {{10}^{-5}}T $
C) $ 3\times {{10}^{-5}}T $
D) $ 4\times {{10}^{-5}}T $
Show Answer
Answer:
Correct Answer: B
Solution:
$ B=\frac{{\mu_{0}}}{4\pi }\times \frac{2i}{r}={{10}^{-7}}\times \frac{2\times 1}{{{10}^{-2}}}=2\times {{10}^{-5}} $ Tesla
BETA
