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Physics - Magnetism Question with Solution | TestHub

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

PhysicsEasysingle choice

Two coplanar concentric circular coils of radii $r$ and $2 r$ , have the same number of turns $n$ . The smaller coil carries a clockwise current $i$ , while the larger coil carries an anticlockwise current $2 i$ . The magnetic field induction at the centre is

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Answer:

Solution:

$B_{1} = \frac{μ_{0} n i}{2 r}, B_{2} = \frac{μ_{0} n (2 i)}{2 (2 r)}$
$B_{R} = B_{1} - B_{2}$
$B_{1} = B_{2},$ both are in opposite direction

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

⏱ 2mℹ️ Source: PYQ_2020

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