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AIIMS 2015
Exam
AIIMS
Year
2015
Subject
Physics
Chapter
Magnetic Effects of Current

AIIMS 2015 · Physics · Magnetic Effects of Current

What is the magnetic field on the axis of a coil of radius r...

What is the magnetic field on the axis of a coil of radius rr carrying current II at a distance RR from the origin?

Options

  1. Aμ0Ir22(r2+R2)3/2\frac{\mu_0 I r^2}{2\left(r^2+R^2\right)^{3 / 2}}
  2. Bμ0IR22(r2+R2)3/2\frac{\mu_0 I R^2}{2\left(r^2+R^2\right)^{3 / 2}}
  3. Cμ0I2(r+R)\frac{\mu_0 I}{2(r+R)}
  4. Dμ0IR2(r2+R2)1/2\frac{\mu_0 I R}{2\left(r^2+R^2\right)^{1 / 2}}

Correct answer

A. μ0Ir22(r2+R2)3/2\frac{\mu_0 I r^2}{2\left(r^2+R^2\right)^{3 / 2}}

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