Magnetic Effects Of Current Question 99
Question: A current of 0.1 A circulates around a coil of 100 turns and having a radius equal to 5cm. The magnetic field set up at the centre of the coil is (m0 = 4p ´ 10?7 weber/amp-metre) [DPMT 2002]
Options:
A) 2 ´ 10?5 Tesla
B) 4 ´ 10?5 Tesla
C) 8p ´ 10?5 Tesla
D) 4p ´ 10?5 Tesla
Show Answer
Answer:
Correct Answer: D
Solution:
$ B=\frac{{\mu_{0}}}{4\pi }.\frac{2\pi Ni}{r}=\frac{{{10}^{-7}}\times 2\pi \times 100\times 0.1}{5\times {{10}^{-2}}}=4\pi \times {{10}^{-5}}T $
BETA
