Question

(iii) Assertion: During thunderstorms, the movements in the clouds cause the charges in the water molecules to separate. Reason: The positive charges collect at the lower regions of the clouds and the negative charges concentrate atthe higher regions of the clouds.
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Answer 1

Answer:

positively charged

We have to find the nature of charges on upper edges of clouds in a thunderstorm, the air currents move upwards while the water droplets move downward. This vigorous movement causes separation of charges. This leads to the positive charges collected near the upper edges of clouds and the negative charges to accumulate near the lower edges of the clouds.