NEET 2020

NEET 2020 Physics question on Magnetism and Moving Charges

A long solenoid of 50 cm length having 100 turns carries a current of 2.5 A. The magnetic field at the centre of the solenoid is :
(μ0=4π×10−7 T m A−1\mu_0 = 4\pi \times 10^{-7}\,\text{T m A}^{-1})
  1. A.
    3.14×10−4 T3.14 \times 10^{-4}\,\text{T}
  2. B.
    6.28×10−5 T6.28 \times 10^{-5}\,\text{T}
  3. C.
    3.14×10−5 T3.14 \times 10^{-5}\,\text{T}
  4. D.
    6.28×10−4 T6.28 \times 10^{-4}\,\text{T}
Show answer

Correct option: D

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