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Hey everyone, welcome back.
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In this question, we have to name three situations under which force is created.
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So, uh, let us consider first situation as there is a charge.
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Let's say this is a point charge in influence of electric field.
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Let's say this is the electric field.
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So whenever there is a charge in electric field, then there is a force developed on this particular charge due to electric field.
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So there will be force on this particular charge.
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Let us consider this charge is positive.
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So in this direction only, there will be force on this particular charge.
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In the second part of question, in the second situation, let us consider a block on the surface of earth...