ESS
Grade-9
Easy
Question
Cycles of sunspot maximum occur around every ___________.
- 7 years
- 9 years
- 10 years
- 11 years
Hint:
More than a decade.
The correct answer is: 11 years
- The solar cycle, also known as the solar magnetic activity cycle, sunspot cycle, or Schwabe cycle, is an approximately 11-year period of periodic variation in solar activity as measured by variations in the number of sunspots observed on the surface of the sun.
- So, the correct option is d.
- The solar cycle affects activity on the surface of the Sun, such as sunspots which are caused by the Sun's magnetic fields.
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