Question

The magnetic field at the centre of a circular coil of radius R carrying current I is 64 times the magnetic field at a distance x on its axis from the centre of the coil. Then the value of x is

• A. $\frac{R}{4}\sqrt{3}$
• B. $R\sqrt{3}$
• C. $\frac{R}{4}$
• D. $R\sqrt{15}$

Answer 1

Answer: (D)

$R\sqrt{15}$

Answer 2

The correct answer is Option (D) : $R\sqrt{15}$