Magnetic Effects Of Current Question 71
Question: Magnetic field intensity at the centre of coil of 50 turns, radius 0.5 m and carrying a current of 2 A is [CBSE PMT 1999; BHU 2002]
Options:
A) $ 0.5\times {{10}^{-5}},T $
B) $ 1.25\times {{10}^{-4}},T $
C) $ 3\times {{10}^{-5}},T $
D) $ 4\times {{10}^{-5}},T $
Show Answer
Answer:
Correct Answer: B
Solution:
$ B=\frac{{\mu_{0}}Ni}{2r}=\frac{4\pi \times {{10}^{-7}}\times 50\times 2}{2\times 0.5}=1.25\times {{10}^{-4}},T $
BETA
