Question

A coil having 9 turns carrying a current produces magnetic filed B1 at the centre. Now the coil is rewounded into 3 turns carrying same current. Then the magnetic field at the centre B2=

• A. $\frac{B_1}{9}$
• B. 9B1
• C. 3B1
• D. $\frac{B_1}{3}$

Answer 1

Answer: (A)

$\frac{B_1}{9}$

Answer 2

The correct answer is Option (A) : $\frac{B_1}{9}$