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Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismMagnetic Dipole & MomentEasy2 minPYQ_2020

PhysicsEasysingle choice

A magnetic dipole of magnetic moment $6 \times 10^{- 2} A m^{2}$ and moment of inertia $12 \times 10^{- 6} k g m^{2}$ performs oscillations in a magnetic field of $2 \times 10^{- 2} T$ . The time taken by the dipole to complete 20 oscillations is $(π ≃ 3)$

Options:

Answer:

Solution:

Given,

Magnetic moment $(M) = 6 \times 10^{- 2} A m^{2}$

Moment of inertia $(I) = 12 \times 10^{- 6} k g m^{2}$

Magnetic field $(B) = 2 \times 10^{- 2} T$

We know that,

Time $T = 2 π \sqrt{\frac{I}{M B}}$

$= 2 π \sqrt{\frac{12 \times 10^{- 6}}{6 . \times 10^{- 2} \times 2 \times 10^{- 2}}}$

$= 2 π \sqrt{\frac{12 \times 10^{- 2}}{12}}$

$= 2 π \times 10^{- 1}$ s

For 20 oscillations of $t \approx 12 s$

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

⏱ 2mℹ️ Source: PYQ_2020

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