What is the purpose of this wire

Reference no: EM13102910

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.

Reference no: EM13102910

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What is the purpose of this wire : 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?

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