Question

Magnetic field at point 'P' of given current distribution is :-

• A. $\frac{{\mu }_{0}I}{2\pi a}\otimes$
• B. $\frac{{\mu }_{0}I}{8\pi a}\odot$
• C. $\frac{{\mu }_{0}I}{2\pi a}\odot$
• D. zero

Answer 1

Answer: (C)

$B_P=\frac{{\mu }_{0}I}{4\pi a}+\frac{{\mu }_0(2I)}{4\pi (2a)}\odot$
$=\frac{{\mu }_{0}I}{2\pi a}\odot$