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A long solenoid is formed by winding $70$ turns $\mathrm{cm^{-1}}$ . If $\mathrm{2.0 A}$ current flows, then the magnetic field produced inside the solenoid is __________ $\mathrm{\left ( \mu _{0}=4\pi\times 10^{-7}TmA^{-1} \right )}$
Option: 1
$88\times 10^{-4}\mathrm{T}$

Option: 2
$352\times 10^{-4}\mathrm{T}$

Option: 3
$176\times 10^{-4}\mathrm{T}$

Option: 4
$1232\times 10^{-4}\mathrm{T}$

Answers (1)

best_answer

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

$\mathrm{=4\times \frac{22}{7}\times 10^{-7}\times 70\times 100\times 2}$

$\mathrm{=176\times 10^{-4}}$

Posted by

Sanket Gandhi

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