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There was a heavy rain with thunderstorms. Vijay was in his house with his brother. Vijay told to his brother that thunder is caused due to collision of two clouds. Do you think Vijay is right? Why ?

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Solution

During thunderstorms, huge clouds are formed such that the air currents move upward while the water droplets move downward. These vigorous movements cause separation of charges. The positive charges collect near the upper edges of the clouds and the negative charges accumulate near the lower edges. When the magnitude of the accumulated charges becomes very large, the air which is normally a poor conductor of electricity, is no longer able to resist their flow. Negative and positive charges meet, producing streaks of bright light and sound. This sound is what causes thunder. Hence, Vijay is right.

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