How regularly does the Sun's magnetic pole switch?

How regularly does the Sun's magnetic pole switch?

• A. Every eleven years
• B. Every hundred years
• C. Every year
• D. Every fifty years

Answer: (A)

The Sun’s magnetic field is generated by a dynamo inside its interior, and it evolves in a regular cycle. Observations show the global magnetic dipole flips its orientation during solar maximum, so the magnetic poles switch roughly every 11 years. This 11-year rhythm aligns with the sunspot cycle, where activity waxes and wanes with a similar period. If you follow two of these reversals, the magnetic field returns to its original polarity about 22 years after the first flip, which is the full Hale cycle. So the best answer is that the Sun’s magnetic poles switch about every eleven years.

The Sun’s magnetic field is generated by a dynamo inside its interior, and it evolves in a regular cycle. Observations show the global magnetic dipole flips its orientation during solar maximum, so the magnetic poles switch roughly every 11 years. This 11-year rhythm aligns with the sunspot cycle, where activity waxes and wanes with a similar period. If you follow two of these reversals, the magnetic field returns to its original polarity about 22 years after the first flip, which is the full Hale cycle. So the best answer is that the Sun’s magnetic poles switch about every eleven years.