A tightly wound 100 turns coil of radius 10 cm carries a current of 7 A. The magnitude of the magnetic field at the centre of the coil is (Take permeability of free space as 4π×10^-7 SI units):

NEET UG 2024 · Physics · Question 25

NEET 2024 Physics, question 25

Question 25 of the NEET 2024 paper (code T2) is a Physics question from Moving Charges and Magnetism. Its idea, Field at Center of Loop, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 1.

Updated 2026-10-08

Q25 · Physics

4\pi\times10^{-7}

1 4.4 mT Official answer 2 44 T 3 44 mT 4 4.4 T

Official answer: option 1 · NTA final answer key

Same idea

The only question on Field at Center of Loop

No other NEET paper from 2017–2026 tested this exact idea.

Field at Center of Loop: every question and how it was framed

The chapter

Moving Charges and Magnetism in ten years of NEET

22 questions from 2017–2026, asked in 10 of 10 papers, about 2.1 a paper. Biot-Savart Law alone had 4.

Chapter analysis Study this chapter Practise this chapter

The only question on Field at Center of Loop

Moving Charges and Magnetism in ten years of NEET

Moving Charges and Magnetism: questions per paper