What would create a stronger magnetic field?

What would create a stronger magnetic field?

• A. Wrapping the windings of a conductor closer together
• B. Both A and B
• C. Increasing the number of loops in a coil
• D. None of the above

Answer: (B)

The magnetic field strength of a coil depends on ampere-turns: how much current is flowing times how many turns contribute to the field. If you keep the current fixed, there are two effective ways to raise the field. First, wrapping the windings closer together increases the number of turns per unit length, so there are more turns contributing in a given length and the field becomes stronger. Second, increasing the total number of loops adds more turns overall, which also increases the field for the same current because more current paths add their magnetic effects. So both adjustments raise the field: packing the windings tighter and adding more loops both boost the coil’s magnetic field. The option that combines these ideas correctly reflects how to strengthen the field.

The magnetic field strength of a coil depends on ampere-turns: how much current is flowing times how many turns contribute to the field. If you keep the current fixed, there are two effective ways to raise the field. First, wrapping the windings closer together increases the number of turns per unit length, so there are more turns contributing in a given length and the field becomes stronger. Second, increasing the total number of loops adds more turns overall, which also increases the field for the same current because more current paths add their magnetic effects.

So both adjustments raise the field: packing the windings tighter and adding more loops both boost the coil’s magnetic field. The option that combines these ideas correctly reflects how to strengthen the field.