Physics - Magnetism Question with Solution | TestHub

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

PhysicsEasysingle choice

A wire of length $100 m$ is tightly wounded on a hollow tube of radius 5mm and length $1 m$ . A current of $1 A$ is flowing in the wire. Then magnetic field strength inside the tube will be :-

Options:

Answer:

Solution:

Field due to a solenoid = $μ_{0} ni$

Given i = 1 A

$n = \frac{100}{2 π \times 5 \times 1 0^{- 3}}$

$∴ B = μ_{0} ni = \frac{4 π \times 1 0^{- 7} \times 100 \times 1}{2 π \times 5 \times 1 0^{- 3}} = 4 mT$

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

⏱ 2mℹ️ Source: PYQ_2020

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