[[1]] discovered static electricity or lightning in clouds.

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Detailed Solution

Benjamin Franklin discovered static electricity or lightning in clouds. Benjamin Franklin discovered static electricity or lightning in clouds. During the development of thunderstorms, there is always an upward movement of air while the water droplets move downward. These vigorous movements cause the separation of charges. Therefore, the top of the cloud becomes positively charged while the bottom of the cloud becomes negatively charged. So, when both the positive and negative charges of clouds meet, then they produce an intense spark of electricity.

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