Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismBiot-savart's & Ampere's Circuital lawEasy2 minPYQ_2021

PhysicsEasysingle choice

A solenoid is $2 m$ long and $3 cm$ in diameter. It has 5 layers of winding of 1000 turns each and carries a current of $5 A$ . What is the magnetic field at its centre ? Use the standard value of $μ_{0}$ .

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Answer:

Solution:

Length of solenoid, $l = 2 m$ Total number of turns, $N = 5 \times 1000 = 5000$ Number of turns per unit length, $n = \frac{N}{l} = \frac{5000}{2} = 2500 m^{- 1}$ Current, I = 5A Now, B $= μ_{0} nI = 4 π \times 1 0^{- 7} \times 2500 \times 5 T$ $= 1.57 \times 1 0^{- 2} T$

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

⏱ 2mℹ️ Source: PYQ_2021

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