Physics - Magnetism Question with Solution | TestHub

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

PhysicsEasysingle choice

A wire of length $L$ carrying a current $I$ is bent into a circle. The magnitude of the magnetic field at the centre of the circle is

Options:

Answer:

Solution:

Length $L =$ circumference of circle $= 2 πR$

$\Rightarrow R = \frac{L}{2 π}$

$∴$ Magnetic field at the centre of circular current loop is

$B = \frac{μ_{0} I}{2 R} = \frac{μ_{0} I}{2 L} \times 2 π$

$B = \frac{μ_{0} πI}{L}$

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

⏱ 2mℹ️ Source: PYQ_2020

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