CUET Preparation Today
A circular coil A of radius r carries current I. Another circular coil B of radius 2r carries current of I. The magnetic fields at the centres of the circular coils are in the ratio of |
$3:1$ $4:1$ $1:1$ $2:1$ |
$2:1$ |
$ \text{Magnetic Field due to circular coil is } B = \frac{\mu_0 I}{2r}$ $ \frac{B_1}{B_2} = \frac{r_2}{r_1} = 2$ |
