MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Mechatronics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The critical angle in total internal reflection depends on the colour of the incident light. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
What is the working principle of optical fiber? |
| A. | Total internal refraction |
| B. | Total internal reflection |
| C. | Lenz Law |
| D. | Brine theory |
| Answer» C. Lenz Law | |
| 3. |
Which layer is just present above cladding that protects the optical fibre from physical damage? |
| A. | Core |
| B. | Cladding |
| C. | Coating |
| D. | Cover |
| Answer» D. Cover | |
| 4. |
Which layer is just present above core that protects the light from going outside? |
| A. | Core |
| B. | Cladding |
| C. | Coating |
| D. | Mine |
| Answer» C. Coating | |
| 5. |
Who is known as the father of fibre optics? |
| A. | Nick brown |
| B. | Nick Holonyak |
| C. | Stefencolumbus |
| D. | Narinder Singh Kapany |
| Answer» E. | |
| 6. |
Which electromagnetic rays is emitted GaAs LED s ? |
| A. | Infrared |
| B. | Visible light |
| C. | Ultraviolet |
| D. | Radio |
| Answer» B. Visible light | |
| 7. |
Optical isolator is also called as ________ |
| A. | Opaque isolator |
| B. | Optical coupling |
| C. | Optocoupler |
| D. | Optical resistor |
| Answer» D. Optical resistor | |
| 8. |
Which is a type of Opto-isolator? |
| A. | CMCP793V-500 |
| B. | MOC3021 |
| C. | MPU 6050 |
| D. | L298N |
| Answer» C. MPU 6050 | |
| 9. |
LASER stands for ____ |
| A. | Light amplification by systematic emission of radiation |
| B. | Light amplification by stimulated emission of radiation |
| C. | Light absorption by stimulated emission of radiation |
| D. | Low amplification by stimulating emitted radiation |
| Answer» C. Light absorption by stimulated emission of radiation | |
| 10. |
Opto-isolator uses a source of light for transmission, most commonly near infrared light emitting diodes . |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
Recombination of charge carriers in an LED, releases some energy which comes out in the form of light. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 12. |
Which alloy is used for red, orange and yellow LED s? |
| A. | InGaN (Indium gallium nitride) |
| B. | GaAs (Gallium arsenide) |
| C. | (AlGaInP) Aluminum gallium indium phosphide |
| D. | TiO2(titanium dioxide) |
| Answer» D. TiO2(titanium dioxide) | |
| 13. |
Which alloy is used for green blue and white LED s? |
| A. | InGaN (Indium gallium nitride) |
| B. | GaAs (Gallium arsenide) |
| C. | (AlGaInP) Aluminum gallium indium phosphide |
| D. | TiO2(titanium dioxide) |
| Answer» B. GaAs (Gallium arsenide) | |
| 14. |
Who was/were awarded with noble prize in physics in the year 2014 for the invention of blue light emitting diodes? |
| A. | Hiroshi Amano |
| B. | Nick Holonyak |
| C. | Isamu Akasaki, Hiroshi Amano |
| D. | Isamu Akasaki, Hiroshi Amano and Shuji Nakamura |
| Answer» E. | |
| 15. |
Who developed the first Light emitting diode? |
| A. | Nick brown |
| B. | Nick Holonyak |
| C. | Stefencolumbus |
| D. | Billy Stern |
| Answer» C. Stefencolumbus | |