Physics - Magnetism Question with Solution | TestHub

A tightly wound long solenoid carries a current of 1.5 A . An electron is executing uniform circular motion inside the solenoid with a time period of 75 ns . The number of turns per metre in the solenoid is $\dots \dots$ -. [Take mass of electron ${\mathrm{m}}_{\mathrm{e}}=9\times 10^{-31}\mathrm{kg}$, charge of electron $\left|{\mathrm{q}}_{\mathrm{e}}\right|=1.6\times 10^{-19}\mathrm{C}$, ${\mu }_0=4\pi \times 10^{-7}\frac{\mathrm{N}}{{\mathrm{A}}^2},1\mathrm{ns}=10^{-9}\mathrm{s}]$