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Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismProperties of magnetEasy2 minPYQ_2020

PhysicsEasysingle choice

A solenoid of radius $4 cm$ and $1000 turns$ , carries a current of $8 A$ . If it is equivalent to a magnet of same size and magnetisation $\vec{M}$ ( $\frac{Magnetic moment}{Volume}$ ) of
$20000 {Am}^{- 1}$ , then the length of the solenoid is

Options:

Answer:

Solution:

$M = \frac{π r^{2} I N}{π r^{2} L} = \frac{N I}{L} \Rightarrow L = \frac{N I}{M}$
$= \frac{1000 \times 8}{20000} \times 100 cm$

$= 40 cm$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:MagnetismSubtopic:Properties of magnet

⏱ 2mℹ️ Source: PYQ_2020

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