Moving Charges and Magnetism - Result Question 45

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46. Magnetic field intensity at the centre of a coil of 50 turns, radius $0.5 m$ and carrying a current of $2 A$ is

======= ####46. Magnetic field intensity at the centre of a coil of 50 turns, radius $0.5 m$ and carrying a current of $2 A$ is

3e0f7ab6f6a50373c3f2dbda6ca2533482a77bed:content/english/neet-pyq-chapterwise/physics/moving-charges-and-magnetism/moving-charges-and-magnetism—result-question-45.md (a) $0.5 \times 10^{-5} T$

(b) $1.25 \times 10^{-4} T$

(c) $3 \times 10^{-5} T$

(d) $4 \times 10^{-5} T$

[1999]

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Answer:

Correct Answer: 46. (b)

Solution:

  1. (b) We know that magnetic field at the centre of circular coil,

$B=\frac{\mu_0 I n}{2 r}=\frac{4 \pi \times 10^{-7} \times 2 \times 50}{2 \times 0.5}=1.25 \times 10^{-4} N$