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PHYSICS Questions And Answers.
| 1. | When a helium atom loses an electron, it becomes: |
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| A. | An alpha particle |
| B. | Proton |
| C. | A positive helium ion |
| D. | A negative helium ion |
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Published by:Michael Daani
| 2. | When a helium atom loses an electron, it becomes: |
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| A. | Alpha partical |
| B. | A positive helium ion |
| C. | A negative helium ion |
| D. | Proton |
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| 3. | Beta ray emitted by a radioactive substance is: |
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| A. | An electron which was existing outside the nucleus |
| B. | An electron which was existing inside the nucleus. |
| C. | An electron emitted by the nucleus as a result of the decay of neutron inside the nucleus. |
| D. | A pulse of electromagnetic wave. |
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| 4. | An electric charge in uniform motion produces |
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| A. | An electric field. |
| B. | Both magnetic and electric fields. |
| C. | A magnetic field. |
| D. | Neither magnetic nor electric fields |
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| 5. | What is emitted by a hot metal filament in a cathode ray tube? |
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| A. | X ray |
| B. | Electron |
| C. | Proton |
| D. | Photon |
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