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Chapter 4: Q99PP (page 720)

What is the best explanation for the observation that the electric charge on the stem became positive as the charged bee approached (before it landed)? (a) Because air is a good conductor, the positive charge on the bee鈥檚 surface flowed through the air from bee to plant. (b) Because the earth is a reservoir of large amounts of charge, positive ions were drawn up the stem from the ground toward the charged bee. (c) The plant became electrically polarized as the charged bee approached. (d) Bees that had visited the plant earlier deposited a positive charge on the stem

Short Answer

Expert verified

Option (c) The plant became electrically polarized as the charged bee approached is the correct answer.

Explanation: Electric field of the bee causes polarization of the stem.

The stem is electrically neutral, but as the bee approaches the steam the positively charged bee causes polarization of the stem. As a result, a slight shift in positive and negative charges within the molecule of the plants takes place.

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