MCQOPTIONS
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MCQOPTIONS
This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Embedded Systems knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following generates a back EMF? |
| A. | relay |
| B. | buffer |
| C. | transistor |
| D. | FET |
| Answer» B. buffer | |
| 2. |
Which of the following can switch the current by a make or break contact? |
| A. | transistor |
| B. | relay |
| C. | buffer |
| D. | fet |
| Answer» C. buffer | |
| 3. |
Which of the following is a current limiting device? |
| A. | voltage |
| B. | current |
| C. | buffer |
| D. | inductor |
| Answer» D. inductor | |
| 4. |
WHICH_OF_THE_FOLLOWING_IS_A_CURRENT_LIMITING_DEVICE??$ |
| A. | voltage |
| B. | current |
| C. | buffer |
| D. | inductor |
| Answer» D. inductor | |
| 5. |
Which of the following generates a back EMF?$ |
| A. | relay |
| B. | buffer |
| C. | transistor |
| D. | FET |
| Answer» B. buffer | |
| 6. |
Which of the following can switch the current by a make or break contact?$ |
| A. | transistor |
| B. | relay |
| C. | buffer |
| D. | fet |
| Answer» C. buffer | |
| 7. |
Which of the following possesses some loops for providing timing functions? |
| A. | hardware |
| B. | software |
| C. | timer |
| D. | counter |
| Answer» C. timer | |
| 8. |
Which of the following can provide a speed control technique in the DC motor interfacing? |
| A. | PCM |
| B. | DPCM |
| C. | ADPCM |
| D. | PWM |
| Answer» E. | |
| 9. |
Which of the following is used to avoid the back EMF in the relay? |
| A. | resistor |
| B. | capacitor |
| C. | inductor |
| D. | diode |
| Answer» E. | |
| 10. |
Which of the following determines the brightness of LEDs? |
| A. | current |
| B. | voltage |
| C. | resistance |
| D. | conductance |
| Answer» B. voltage | |
| 11. |
How is the biasing done in LEDs? |
| A. | forward bias |
| B. | no bias |
| C. | supply voltage |
| D. | reverse bias |
| Answer» E. | |
| 12. |
Which devices are used as indicators in a digital system? |
| A. | LCD |
| B. | LED |
| C. | Varactor diode |
| D. | Gunn diode |
| Answer» C. Varactor diode | |
| 13. |
Which of the following allows voltage reversing? |
| A. | H bridge |
| B. | Relays |
| C. | LEDs |
| D. | LCDs |
| Answer» B. Relays | |
| 14. |
Which of the following is used to create H bridge? |
| A. | switches |
| B. | led |
| C. | capacitor |
| D. | inductor |
| Answer» B. led | |
| 15. |
Which allows the switching of DC motor by using two outputs and four FETs? |
| A. | transistor |
| B. | H bridge |
| C. | darlington pair |
| D. | buffer pack |
| Answer» C. darlington pair | |
| 16. |
Which of the following is used to switch heavy loads? |
| A. | fet |
| B. | transistor |
| C. | buffer pack |
| D. | darlington pair |
| Answer» B. transistor | |
| 17. |
Which devices have high drive capability? |
| A. | transistor |
| B. | fet |
| C. | buffer pack |
| D. | darlington amplifier |
| Answer» D. darlington amplifier | |
| 18. |
Which of the following can be used for providing high gain? |
| A. | transistor |
| B. | darlington transistor pair |
| C. | resistor |
| D. | capacitor |
| Answer» C. resistor | |