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Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismBiot-savart's & Ampere's Circuital lawMedium2 minPYQ_2016

PhysicsMediumsingle choice

A long straight wire of radius $R$ carries current $i$ . The magnetic field inside the wire at distance $r$ from its centre is expressed as :

Options:

Answer:

Solution:

Using Ampere's law, we have
$\oint B \cdot d ℓ = μ_{0} i_{in} or B \times 2 π r = μ_{0} \frac{i}{π R ^{2}} π r^{2} ∴ B = \frac{μ _{0}}{2 π} \cdot \frac{i r}{R ^{2}}$

Stream:VITEEESubject:PhysicsTopic:MagnetismSubtopic:Biot-savart's & Ampere's Circuital law

⏱ 2mℹ️ Source: PYQ_2016

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