What is the purpose of this wire

Question # 00767856 Posted By: HICKMAN Updated on: 06/26/2020 08:56 AM Due on: 07/09/2020
Subject Physics Topic General Physics Tutorials:
Question
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At some automobile toll-collecting stations, a thin metal wire sticks up from the road and makes contact with cars before they reach the toll collector. What is the purpose of this wire? 1. To count the vehicles 2. To transfer positive particles to the auto- mobile 3. To warn the drivers 4. To transfer electrons to the automobile 5. To discharge the automobile.

 

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