Discussion
Assertion (A): A thunderstorm can be regarded as an electrical generator driven by convection.
Reason (R): The updraught does mechanical work against the electrostatic attraction between charges.
Answer: B
Both are true and the reason gives the energetics, and the ultimate source is latent heat released by condensation. The electrical energy is a small fraction of the total energy the storm processes. Latent heat dwarfs the electrical output entirely.
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