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Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismMagnetic Dipole & MomentEasy2 minQB

PhysicsEasysingle choice

The magnetic moments associated with two closely wound circular coils $A$ and $B$ of radius $r_{A} = 10 cm and r_{B} = 20 cm$ respectively are equal if: (Where $N_{A}, I_{A} and N_{B}, I_{B}$ are number of turn and current of $A and B$ respectively)

Options:

Answer:

Solution:

As magnetic moment of both the coil is the same,

$μ_{1} = μ_{2}$

$\Rightarrow N_{A} [I_{A} π (r_{A}^{2})] = N_{B} [I_{B} π {(r_{B}^{2})}^{2}] \Rightarrow N_{A} [I_{A} {(0.10)}^{2}] = N_{B} [I_{B} {(0.20)}^{2}] \Rightarrow I_{A} N_{A} = 4 I_{B} N_{B}$

Stream:JEESubject:PhysicsTopic:MagnetismSubtopic:Magnetic Dipole & Moment

⏱ 2mℹ️ Source: QB

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