MCQOPTIONS
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MCQOPTIONS
This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Find the wrong statement. |
| A. | An electron gun is to create electrons and then accelerate them to a very high speed |
| B. | Thermionic emissions and photoelectric emissions are the same |
| C. | The kinetic energy of photoelectrons vary |
| D. | Vacuum tubes are thermionic devices |
| Answer» C. The kinetic energy of photoelectrons vary | |
| 2. |
Thermionic emission is dependent on temperature. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
Which of the following are quick electron emissions? |
| A. | Photoelectric emission |
| B. | Field emission |
| C. | Secondary emission |
| D. | Thermionic emission |
| Answer» C. Secondary emission | |
| 4. |
How many types of electron emissions exist? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 1 |
| Answer» D. 1 | |
| 5. |
Identify the process in which an electron escapes from the metal surface. |
| A. | Electron emission |
| B. | Electron displacement |
| C. | Electron transgression |
| D. | Electron movement |
| Answer» B. Electron displacement | |