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Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismBiot-savart's & Ampere's Circuital lawEasy2 minPYQ_2020

PhysicsEasysingle choice

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

Options:

Answer:

Solution:

Using Ampere's law, we have
$\oint \vec{B} . \vec{d l} = μ_{0} i_{i n}$

or $B \times 2 π r = μ_{0} \frac{i}{π R^{2}} π r^{2}$
$∴$ $B = \frac{μ_{0}}{2 π} . \frac{i r}{R^{2}}$

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

⏱ 2mℹ️ Source: PYQ_2020

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