Physics - Magnetism Question with Solution | TestHub

The magnetic induction $B$ along the axis of a toroidal solenoid is given by the expression:

$B=\mu nI$

where $\mu$ is the permeability of the medium inside the toroid, $n$ is the number of turns per unit length, and $I$ is the current passing through the solenoid.

From the above formula, it is evident that the magnetic induction depends on the permeability, the number of turns per unit length, and the current. It is independent of the radius of the toroidal solenoid.

Answer: radius of the toroidal solenoid.