What is the magnetic field at a point on the axis of a circular loop of radius R

Practice Questions

Q1
What is the magnetic field at a point on the axis of a circular loop of radius R carrying a current I at a distance x from the center?
  1. (μ₀I)/(2R) * (R²/(R²+x²)^(3/2))
  2. (μ₀I)/(4R) * (R²/(R²+x²)^(3/2))
  3. (μ₀I)/(2R) * (1/(R²+x²)^(3/2))
  4. (μ₀I)/(4R) * (1/(R²+x²)^(3/2))

Questions & Step-by-Step Solutions

What is the magnetic field at a point on the axis of a circular loop of radius R carrying a current I at a distance x from the center?
  • Step 1: Understand that we have a circular loop with a radius R and it carries a current I.
  • Step 2: Identify the point where we want to find the magnetic field, which is on the axis of the loop at a distance x from the center.
  • Step 3: Recall the formula for the magnetic field B at a point on the axis of a circular loop: B = (μ₀I)/(2R) * (R²/(R²+x²)^(3/2)).
  • Step 4: Recognize that μ₀ is the permeability of free space, a constant that helps in calculating the magnetic field.
  • Step 5: Plug in the values of I (current), R (radius), and x (distance) into the formula to calculate the magnetic field B.
  • Step 6: Simplify the expression if necessary to find the final value of the magnetic field at the specified point.
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