Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismMiscellaneousMedium2 minPYQ_2020

PhysicsMediumsingle choice

A finite carrying-current wire is placed in a plane along with a very long, straight conductor carrying current as shown in the figure. The torque on the finite current wire about point $O$ is

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Answer:

Solution:

$B_{(x)} = \frac{μ_{0}}{2 π} \cdot \frac{I_{1}}{x}, dF = B_{(x)} I_{2} dx$

$dF = \frac{μ_{0}}{2 π} \cdot \frac{I_{1} I_{2}}{x} dx, dτ = dF \cdot x = \frac{μ_{0}}{2 π} I_{1} I_{2} dx$

$τ = \frac{μ_{0}}{2 π} \cdot I_{1} I_{2} \int_{l}^{2 l} dx = \frac{μ_{0}}{2 π} I_{1} I_{2} l$

Stream:JEESubject:PhysicsTopic:MagnetismSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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