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Physics Class 12th Mechanical Properties of Solids Physics NCERT Exemplar Solutions Class 12th Chapter Nine

A closely wounded circular coil of radius 5cm produces a magnetic field of 37.68 × 104 T at its centre. The current through the coil is_ A. [Given, number of turns in the coil is 100 and = 3.14]

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Vishal Baghel | Contributor-Level 10

2 months ago

$B_{c e n t r e} = N \frac{μ_{0} i}{2 r}$

$\Rightarrow \frac{100 \times 4 π \times 1 0^{- 7} \times i}{2 \times 5 \times 1 0^{- 2}} = 37.68 \times 1 0^{- 4}$

$∴ i = \frac{37.68}{4 \times 3.14} = 3 A$

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A closely wounded circular coil of radius 5cm produces a magnetic field of 37.68 × 104 T at its centre. The current through the coil is_ A. [Given, number of turns in the coil is 100 and = 3.14]

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