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NEET
Exam
NEET
Subject
Physics
Chapter
Magnetic Properties of Matter

NEET · Physics · Magnetic Properties of Matter

A magnetic material of susceptibility 499 is placed inside a...

A magnetic material of susceptibility 499499 is placed inside a magnetising field of 40004000 A m−1^{-1}. The magnetic induction inside the material is:
(μ0=4π×10−7\mu_0 = 4\pi \times 10^{-7} T m A−1^{-1})

Options

  1. A0.7984π0.7984\pi T
  2. B0.8π×10−30.8\pi \times 10^{-3} T
  3. C0.8π0.8\pi T
  4. D1.6π1.6\pi T

Correct answer

C. 0.8π0.8\pi T

Step-by-step solution

Relative permeability is given by μr=1+χm\mu_r = 1 + \chi_m.

μr=1+499=500\mu_r = 1 + 499 = 500

The magnetic induction BB inside the material is given by B=μH=μ0μrHB = \mu H = \mu_0 \mu_r H.

B=(4π×10−7)×500×4000B = (4\pi \times 10^{-7}) \times 500 \times 4000

B=4π×10−7×2×106=0.8πB = 4\pi \times 10^{-7} \times 2 \times 10^6 = 0.8\pi T

Answer: 0.8π0.8\pi T
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