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Consider the following statements about thunderstorm charge structure.
1. The main negative centre lies in the mixed phase region.
2. A broad positive region sits above it near the anvil.
3. The charge structure is identical in every thunderstorm.

  • A.3 only
  • B.1 only
  • C.All of them
  • D.1 and 2 only

Answer: D

The first two are correct and describe the classical tripole. The third is not so, and inverted structures with the polarity reversed are observed in some severe storms on the plains. Such storms produce anomalously many positive flashes.

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