Physics - Magnetism Question with Solution | TestHub

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

PhysicsEasysingle choice

An infinitely long hollow conducting cylinder with inner radius $\frac{R}{2}$ and outer radius $R$ carries a uniform current density along its length. The magnitude of the magnetic field, $|\vec{B}|$ as a function of the radial distance $r$ from the axis, is best represented by:

Options:

Answer:

Solution:

$r < \frac{R}{2}$ , $B = 0$
$r > R$ , $B = \frac{μ_{0} I}{2 π r}$
$\frac{R}{2} < r < R$ , $B = \frac{μ_{0} I}{2 π r} [\frac{r^{2} - {(\frac{R}{2})}^{2}}{R^{2} - {(\frac{R}{2})}^{2}}]$

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

⏱ 2mℹ️ Source: PYQ_2020

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