Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismMagnetic Dipole & MomentEasy2 minPYQ_2023

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:

The magnetic moment associated with circular coil,
$M = N I A M_{A} = M_{B} ∴ N_{A} I_{A} A_{A} = N_{B} I_{B} A_{B} ∴ N_{A} I_{A} π (0.1)^{2} = N_{B} I_{B} π (0.2)^{2} (∵ A = π r^{2}) ∴ N_{A} I_{A} = 4 N_{B} I_{B}$

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

⏱ 2mℹ️ Source: PYQ_2023

Doubts & Discussion

Loading discussions...