The magnetic field at the centre of a flat coil can be increased by:

  1. reversing the current
  2. increasing the radius
  3. using copper of lower resistance only
  4. increasing the current or the number of turns
Answer

D) increasing the current or the number of turns

B = mu0NI2r. SLO P-09-E-35 · Application

Physics MCQ · More Magnetism and Electromagnetic Induction MCQs · Practise