Multiple choice

Where is the strength of a magnetic field greatest in a circular current-carrying conductor?

  1. Tangent to the wire

  2. Parallel to the wire

  3. Perpendicular to the wire

  4. Centre of the wire

  5. -

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct answer. The strength of the magnetic field is the greatest at the centre as all lines of force add up to each other.