| 21. | When an electrical conductor moves through a magnetic field, an electric current is induced into the conductor.
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| 22. | When radio waves pass an electrical conductor, the oscillating fields induce an alternating current in the conductor.
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| 23. | Copper is one of nature s most efficient thermal and electrical conductors, which helps to conserve energy.
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| 24. | The same thing also happens when the electrical conductor is stationary and the magnetic field is moving.
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| 25. | The phosphors are usually poor electrical conductors.
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| 26. | For example, saltwater is an electrical conductor.
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| 27. | In these cables, the optical fibers carry information, and the electrical conductors are used to transmit power.
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| 28. | The invention of the telephone in 1876 created further demand for copper wire as an electrical conductor.
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| 29. | Despite competition from other materials, copper remains the preferred electrical conductor in nearly all categories of electrical wiring.
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| 30. | Plastics can be good electrical conductors.
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