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| Q. |
Moving electric charge produces - |
| A. | magnetic field |
| B. | sound waves |
| C. | light rays |
| D. | heat waves |
| Answer» A. magnetic field | |
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Explanation: An electric charge always produces an electric field, regardless of speed, and a moving charge generates a magnetic field. An electric current passing through a conductor produces a magnetic field because it has many charges in motion. |
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