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NDA 2 2024 GAT, question 68

Topic: Physics

Q68

Lightning is due to

  1. (a) The flow of charges between different parts of the cloudCorrect answer
  2. (b) The short-circuiting of charges between the upper and lower surfaces of the cloud
  3. (c) The collection of positively charged particles on the base and collection of negatively charged particles at the top of the cloud
  4. (d) The induction of positive charge on the ground below the negative charge at the base of the cloud

Solution.

Answer: (a) The flow of charges between different parts of the cloud

  1. Lightning is an electrical discharge produced by a sufficiently large potential difference.
  2. A discharge between charged regions of a cloud is a valid example.
  3. Charge separation explains the buildup, but is not itself the discharge.