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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACMiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

A current $i$ is uniformly distributed over the cross-section of a long hollow cylindrical wire of inner radius $R_{1}$ and outer radius $R_{2}$ . Magnetic field $B$ varies with distance $r$ from the axis of the cylinder as

Options:

Answer:

Solution:

$r < R_{1}, B = 0$

$r > R_{2}, b = \frac{μ_{0} i}{2 π r}$

$R_{1} < r < R_{2}, B = \frac{μ_{0} i (r^{2} - R_{1}^{2})}{2 π r (R_{2}^{2} - R_{1}^{2})}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:EMI/ACSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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