MCQOPTIONS
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MCQOPTIONS
This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Electronic Devices Circuits knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In Hall Effect, the electric field applied is perpendicular to both current and magnetic field? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
What is the conductivity when the Hall Effect coefficient is 5 and mobility is 5cm2 /s. |
| A. | 100 S/m |
| B. | 10 S/m |
| C. | 0.0001S/m |
| D. | 0.01 S/m |
| Answer» D. 0.01 S/m | |
| 3. |
Calculate the Hall Effect coefficient when number of electrons in a semiconductor is 1020. |
| A. | 0.625 |
| B. | 0.0625 |
| C. | 6.25 |
| D. | 62.5 |
| Answer» C. 6.25 | |
| 4. |
Calculate the Hall voltage when B=5A/m, I=2A, w=5cm and n=1020. |
| A. | 3.125V |
| B. | 0.3125V |
| C. | 0.02V |
| D. | 0.002V |
| Answer» E. | |
| 5. |
Which of the following formulae doesn’t account for correct expression for J? |
| A. | ρv |
| B. | I/wd |
| C. | σE |
| D. | µH |
| Answer» E. | |
| 6. |
Which of the following parameters can’t be found with Hall Effect? |
| A. | Polarity |
| B. | Conductivity |
| C. | Carrier concentration |
| D. | Area of the device |
| Answer» E. | |
| 7. |
In the Hall Effect, the directions of electric field and magnetic field are parallel to each other.The above statement is |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
Hall sensor is used to measure the following |
| A. | Position of shaft |
| B. | Angular velocity |
| C. | Strength of magnetic field |
| D. | All the above |
| Answer» E. | |
| 9. |
If l is the current flowing through a Hall effect sensor and B is the magnetic flux density perpendicular to the direction of the current (in the plane of the Hall effect sensor), the Hall voltage generated is |
| A. | Directly proportional to l and inversely proportional to B |
| B. | Directly proportional to both l and B |
| C. | Inversely proportional to both l and B |
| D. | Inversely proportional to l and directly proportional to B |
| Answer» C. Inversely proportional to both l and B | |
| 10. |
Give below are two statements:Statement 1: The Hall effect sensor is included in the magnetic core structure of the current probe.Statement 2: The Hall effect sensor assures that the static magnetic flux in the core is exactly zero.In the light of the above statements, choose the most appropriate answer from the options given below(1) Both Statement 1 and Statement 2 are correct(2) Both Statement 1 and Statement 2 are incorrect(3) Statement 1 is correct but Statement 2 is incorrect(4) Statement 1 is incorrect but Statement 2 is correct. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 11. |
WHAT_IS_THE_CONDUCTIVITY_WHEN_THE_HALL_EFFECT_COEFFICIENT_IS_5_AND_MOBILITY_IS_5CM2_/S.?$ |
| A. | 100 S/m |
| B. | 10 S/m |
| C. | 0.0001S/m |
| D. | 0.01 S/m |
| Answer» D. 0.01 S/m | |
| 12. |
In_Hall_Effect,_the_electric_field_applied_is_perpendicular_to_both_current_and_magnetic_field?$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
Calculate the Hall Effect coefficient when number of electrons in a semiconductor is 1020? |
| A. | 0.625 |
| B. | 0.0625 |
| C. | 6.25 |
| D. | 62.5 |
| Answer» C. 6.25 | |
| 14. |
Calculate the Hall voltage when B=5A/m, I=2A, w=5cm and n=1020. |
| A. | 3.125V |
| B. | 0.3125V |
| C. | 0.02V |
| D. | 0.002V |
| Answer» E. | |
| 15. |
Which of the following formulae doesn’t account for correct expression for J?$ |
| A. | ρv |
| B. | I/wd |
| C. | σE |
| D. | µH |
| Answer» E. | |
| 16. |
Calculate the hall voltage when the Electric Field is 5V/m and height of the semiconductor is 2cm. |
| A. | 10V |
| B. | 1V |
| C. | 0.1V |
| D. | 0.01V |
| Answer» D. 0.01V | |
| 17. |
What is the velocity when the electric field is 5V/m and the magnetic field is 5A/m? |
| A. | 1m/s |
| B. | 25m/s |
| C. | 0.2m/s |
| D. | 0.125m/s |
| Answer» B. 25m/s | |
| 18. |
In the Hall Effect, the electric field is in x direction and the velocity is in y direction. What is the direction of the magnetic field? |
| A. | X |
| B. | Y |
| C. | Z |
| D. | XY plane |
| Answer» D. XY plane | |
| 19. |
Which of the following parameters can’t be found with Hall Effect?$ |
| A. | Polarity |
| B. | Conductivity |
| C. | Carrier concentration |
| D. | Area of the device |
| Answer» E. | |
| 20. |
In the Hall Effect, the directions of electric field and magnetic field are parallel to each other. |
| A. | |
| B. | True |
| Answer» C. | |