McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Uncategorized topics .
Chapters
| 1. |
An electron is travelling at right angles to a uniform magnetic field of flux density 1.2 mT with a speed of $$$8*10^{6} \: ms ^{-1}$$$ , the radius of the circular path followed by an electron is |
| A. | 3.8 cm |
| B. | 3.7 cm |
| C. | 3.6 cm |
| D. | 3.5 cm |
| Answer» A. 3.8 cm | |
| 2. |
Hall voltage is directly proportional to |
| A. | current |
| B. | electric field |
| C. | magnetic flux density |
| D. | all of above |
| Answer» C. magnetic flux density | |
| 3. |
Force due to magnetic field and velocity is |
| A. | at right angles to each other |
| B. | at acute angles with each other |
| C. | at obtuse angle with each other |
| D. | antiparallel to each other |
| Answer» A. at right angles to each other | |
| 4. |
Force on a moving charge in a uniform magnetic field depends upon |
| A. | magnetic flux density |
| B. | the charge on the particle |
| C. | the speed of particle |
| D. | all of above |
| Answer» D. all of above | |
| 5. |
Electric field strength related to hall voltage is given by |
| A. | VHd |
| B. | VH⁄d |
| C. | VHE |
| D. | Ed |
| Answer» B. VH⁄d | |
| 6. |
Hall probe is made up of |
| A. | metals |
| B. | non metals |
| C. | semiconductor |
| D. | radioactive material |
| Answer» C. semiconductor | |
| 7. |
For an electron, magnitude of force on it is |
| A. | BeV |
| B. | eV |
| C. | Be |
| D. | BV |
| Answer» A. BeV | |
| 8. |
When current is parallel to magnetic fields, force on conductor is |
| A. | zero |
| B. | infinite |
| C. | 2 times |
| D. | same |
| Answer» A. zero | |
| 9. |
Direction of conventional current is |
| A. | direction of neutron flow |
| B. | direction of electron flow |
| C. | direction of flow of positive charge |
| D. | same as that of electric current |
| Answer» C. direction of flow of positive charge | |
| 10. |
According to the equation ‘r =(mv)⁄(Be)’, the faster moving particles |
| A. | move in smaller circle |
| B. | move straight |
| C. | move in bigger circle |
| D. | move randomly |
| Answer» C. move in bigger circle | |
| 11. |
In Hall effect, voltage across probe is known as |
| A. | hall voltage |
| B. | e.m.f |
| C. | potential difference |
| D. | hall potential |
| Answer» A. hall voltage | |
Done Studing? Take A Test.
Great job completing your study session! Now it's time to put your knowledge to the test. Challenge yourself, see how much you've learned, and identify areas for improvement. Don’t worry, this is all part of the journey to mastery. Ready for the next step? Take a quiz to solidify what you've just studied.