Question

A toroid has number of turns per unit length $n$, current $i$, then magnetic field is:

• A. ${\mu }_{0}ni$
• B. ${\mu }_0{n}^{2}i$
• C. $\frac{{\mu }_{0}i}{n}$
• D. None of these

Answer 1

Answer: (A)

${\mu }_{0}ni$

The magnetic field at the center of toroid havong $n$ turns per unit length and current $i$ flowing through it is given by:

$B={\mu }_{0}ni$