JEE PYQ: Magnetic Effects Of Current Question 38
Question 38 - 2019 (10 Apr 2019 Shift 2)
The magnitude of the magnetic field at the center of an equilateral triangular loop of side $1$ m which is carrying a current of $10$ A is: [Take $\mu_0 = 4\pi \times 10^{-7}$ NA$^{-2}$]
(1) $18$ $\mu$T
(2) $9$ $\mu$T
(3) $3$ $\mu$T
(4) $1$ $\mu$T
Show Answer
Answer: (1) $18$ $\mu$T
Solution
$B = \frac{9\mu_0 I}{2\pi a} = \frac{9 \times 2 \times 10^{-7} \times 10}{1} = 18$ $\mu$T.
BETA
