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Consider the following statements about non-inductive charging.
1. It requires collisions between graupel and ice crystals.
2. Supercooled liquid water must be present for it to work.
3. It requires a strong pre-existing electric field.

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

Answer: D

The first two are correct and are the necessary conditions. The third describes inductive charging instead, which is generally regarded as secondary to the non-inductive mechanism. Inductive charging amplifies rather than initiates.

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