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): (1) 44 mT (2) 4.4 T (3) 4.4 mT (4) 44 T

Correct Answer: C — 4.4 mTStep-by-step Solution:The magnetic field at the centre of a circular coil is B = (μ₀ N I) / (2 R). Given N = 100, I = 7 A, R = 10 cm = 0.1 m, μ₀ = 4π × 10^{-7} T m/A. Then B = (4π × 10^{-7} × 100 × 7) / (2 × 0.1) = (4π × 10^{-5} × 7) / 0.2 = (28π × 10^{-5}) / 0.2 = 140π × 10^{-5} = 140 × 3.14 × 10^{-5} = 439.6 × 10^{-5} = 4.396 × 10^{-3} T = 4.4 mT.Key Concepts: Magnetic field due to a current-carrying circular coil at centre.

NEET is a competitive examination conducted in India. This question is from the 2024 NEET Physics paper.

How can I prepare for NEET Physics?

To prepare for NEET Physics, practice previous year questions (PYQs), understand concepts thoroughly, and solve mock tests regularly. This 2024 question covers Moving Charges and Magnetism topic.

What is the difficulty level of this question?

This NEET 2024 Physics question has a easy difficulty level and is marked as an important question and is one of the most repeated questions.

Where can I find more NEET previous year questions?

You can find more NEET previous year questions on AspirantMitraa. Browse by subject, topic, year, and difficulty level to practice effectively.

NEET Physics 2024 - A tightly wound 100 turns coil of...

An electron (mass 9 × 10⁻³¹ kg, charge 1.6 × 10⁻¹⁹ C) moving with speed c/100 is injected into a mag…

MEDIUM2025NEETPhysics

A model for quantized motion of an electron in a uniform magnetic field B states that the flux passi…

HARD2025NEETPhysics

A wire carrying a current I along the positive x-axis has length L. It is kept in a magnetic field B…

MEDIUM2023NEETPhysics

A very long conducting wire is bent in a semi-circular shape from A to B as shown in figure. [Semi-c…

HARD2023NEETPhysics

The net magnetic flux through any closed surface is

EASY2023NEETPhysics

Given below are two statements Statement I: Biot-Savart's law gives us the expression for the magnet…

EASY2022NEETPhysics

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): (1) 44 mT (2) 4.4 T (3) 4.4 mT (4) 44 T

Master NEET with Our Test Series

More Questions from Moving Charges and Magnetism

Frequently Asked Questions

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): (1) 44 mT (2) 4.4 T (3) 4.4 mT (4) 44 T

Master NEET with Our Test Series

More Questions from Moving Charges and Magnetism

Frequently Asked Questions