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JEE Main
Exam
JEE Main
Subject
Physics
Chapter
Magnetic Properties of Matter

JEE Main · Physics · Magnetic Properties of Matter

The intensity of the magnetic induction field at the centre of a...

The intensity of the magnetic induction field at the centre of a single turn circular coil of radius 5 cm5 \mathrm{~cm} carrying current of 0.9 A0.9 \mathrm{~A}.

Options

  1. A36π×10−7 T36 \pi \times 10^{-7} \mathrm{~T}
  2. B9π×10−7 T9 \pi \times 10^{-7} \mathrm{~T}
  3. C36π×10−6 T36 \pi \times 10^{-6} \mathrm{~T}
  4. D9π×10−6 T9 \pi \times 10^{-6} \mathrm{~T}

Correct answer

A. 36π×10−7 T36 \pi \times 10^{-7} \mathrm{~T}

Step-by-step solution

The intensity of magnetic induction field B=μ0i2r=4π×10−7×0.92×5×10−2B=36π×10−7 TB=\frac{\mu_0 i}{2 r}=\frac{4 \pi \times 10^{-7} \times 0.9}{2 \times 5 \times 10^{-2}}B=36 \pi \times 10^{-7} \mathrm{~T}
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