MCQOPTIONS
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MCQOPTIONS
This section includes 19 Mcqs, each offering curated multiple-choice questions to sharpen your Digital Circuits knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the backplane in LCD? |
| A. | The ac voltage applied between segment and a common element |
| B. | The dc voltage applied between segment and a common element |
| C. | The amount of power consumed |
| D. | For adjusting the intensity of the LCD |
| Answer» B. The dc voltage applied between segment and a common element | |
| 2. |
In 7 segment display, how many LEDs are used? |
| A. | 8 |
| B. | 7 |
| C. | 10 |
| D. | 9 |
| Answer» C. 10 | |
| 3. |
LCDs operate from a frequency ranges from ___________ |
| A. | 10Hz to 60Hz |
| B. | 50Hz to 70Hz |
| C. | 30Hz to 60Hz |
| D. | None of the Mentioned |
| Answer» D. None of the Mentioned | |
| 4. |
LCDs operate from a voltage ranges from ___________ |
| A. | 3 to 15V |
| B. | 10 to 15V |
| C. | 10V |
| D. | 5V |
| Answer» B. 10 to 15V | |
| 5. |
The first LCDs became commercially available in ___________ |
| A. | 1950s |
| B. | 1980s |
| C. | 1960s |
| D. | 1970s |
| Answer» D. 1970s | |
| 6. |
The direction of electric field in an LCD is determined by ___________ |
| A. | the molecule’s chemical structure |
| B. | Crystalline surface structure |
| C. | Molecular Orbital Theory |
| D. | Quantum Cellular Automata |
| Answer» B. Crystalline surface structure | |
| 7. |
Electro-optical effect is produced in ___________ |
| A. | LED |
| B. | LCD |
| C. | OFC |
| D. | OLED |
| Answer» C. OFC | |
| 8. |
The optical properties of liquid crystals depend on the direction of ___________ |
| A. | Air |
| B. | Solid |
| C. | Light |
| D. | Water |
| Answer» D. Water | |
| 9. |
The full form of LCD is ____________ |
| A. | Liquid Crystal Display |
| B. | Liquid Crystalline Display |
| C. | Logical Crystal Display |
| D. | Logical Crystalline Display |
| Answer» B. Liquid Crystalline Display | |
| 10. |
IN_7_SEGMENT_DISPLAY,_HOW_MANY_LEDS_ARE_USED??$ |
| A. | 8 |
| B. | 7 |
| C. | 10 |
| D. | 9 |
| Answer» C. 10 | |
| 11. |
What is backplane in LCD?$ |
| A. | The ac voltage applied between segment and a common element |
| B. | The dc voltage applied between segment and a common element |
| C. | The amount of power consumed |
| D. | None of the Mentioned |
| Answer» B. The dc voltage applied between segment and a common element | |
| 12. |
LCDs operate from a frequency ranges fro? |
| A. | 10Hz to 60Hz |
| B. | 50Hz to 70Hz |
| C. | 30Hz to 60Hz |
| D. | None of the Mentioned |
| Answer» D. None of the Mentioned | |
| 13. |
LCDs operate from a voltage ranges from |
| A. | 3 to 15V |
| B. | 10 to 15V |
| C. | 10V |
| D. | 5V |
| Answer» B. 10 to 15V | |
| 14. |
The first LCDs became commercially available in |
| A. | 1950s |
| B. | 1980s |
| C. | 1960s |
| D. | None of the Mentioned |
| Answer» D. None of the Mentioned | |
| 15. |
The direction of electric field in a LCD is determined by |
| A. | the molecule’s chemical structure |
| B. | Crystalline surface structure |
| C. | Molecular Orbital Theory |
| D. | None of the Mentioned |
| Answer» B. Crystalline surface structure | |
| 16. |
Electro-optical effect is produced in |
| A. | LED |
| B. | LCD |
| C. | OFC |
| D. | None of the Mentioned |
| Answer» C. OFC | |
| 17. |
By which properties, the orientation of molecules in a layer of liquid crystals can be changed? |
| A. | Magnetic field |
| B. | Electric field |
| C. | Electromagnetic field |
| D. | None of the Mentioned |
| Answer» C. Electromagnetic field | |
| 18. |
The optical properties of liquid crystals depend on the direction of |
| A. | Air |
| B. | Solid |
| C. | Light |
| D. | Water |
| Answer» D. Water | |
| 19. |
The full form of LCD is |
| A. | LIquid Crystal Display |
| B. | Liquid Crystalline Display |
| C. | Logical Crystal Display |
| D. | Logical Crystalline Display |
| Answer» B. Liquid Crystalline Display | |