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A long solenoid of \( 50 \mathrm{~cm} \) length having 100 turns carries a current of \( 2.5 \mathrm{~A} \). The magneti…

Q1

A long solenoid of \( 50 \mathrm{~cm} \) length having 100 turns carries a current of \( 2.5 \mathrm{~A} \). The magnetic field at the centre of the solenoid is \( \left(\mu_{0}=4 \pi \times 10^{-7} \mathrm{~T} \mathrm{~m} \mathrm{~A}^{-1}\right) \)

[NEET 2020]

a

\( 6.28 \times 10^{-4} \mathrm{~T} \)

b

\( 3.14 \times 10^{-4} \mathrm{~T} \)

c

\( 6.28 \times 10^{-5} \mathrm{~T} \)

d

\( 3.14 \times 10^{-5} \mathrm{~T}\)

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