A long solenoid of 50 cm length having 100 turns carries a current of 2.5 A. The magnetic field at the centre of the solenoid is :$\left( {{\mu _0} = 4\pi \times {{10}^{ - 7}}Tm{{A}^{-1}}} \right)$

Question

A long solenoid of 50 cm length having 100 turns carries a current of 2.5 A. The magnetic field at the centre of the solenoid is :
$\left( {{\mu _0} = 4\pi \times {{10}^{ - 7}}Tm{{A}^{-1}}} \right)$

3.14 ${ \times {{10}^{ - 4}}T}$

6.28 ${ \times {{10}^{ - 5}}T}$

3.14 ${ \times {{10}^{ - 5}}T}$

6.28 ${ \times {{10}^{ - 4}}T}$

Solution

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