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Which of the following is the most necessary for an electric field to exist?(a) Current(b) Potential difference(c) Dielectric material(d) Metal conductor |
Answer» The correct option is (b) Potential difference For explanation I would say: The most important thing for an electric field to exist is a potential difference between two conductors. It is not that only metal conductors can produce an electric field, potential difference between fluids also produces electric fields. |
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