Competency #8
Answer and Explanation
Around high tension power lines there are:
- electric, but no magnetic fields.
- neither electric nor magnetic fields.
- both electric and magnetic fields.
- magnetic, but no electric fields.
Answer: The correct answer is C. The high tension lines have a lot of current moving through them (voltages of 12,000 V) and this creates an electric field around the line. At the same time, the moving electrical charge creates a magnetic field as well.
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