MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 27 Mcqs, each offering curated multiple-choice questions to sharpen your BITSAT knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is emf? |
| A. | Force |
| B. | Voltage |
| C. | Current |
| D. | Flux |
| Answer» C. Current | |
| 2. |
What does emf stand for? |
| A. | Electronic magnetic force |
| B. | Electromotive force |
| C. | Electromagnetic force |
| D. | Electromated force |
| Answer» C. Electromagnetic force | |
| 3. |
Find the strength of the magnetic field in a conductor 0.5m long moving with a velocity of 10m/s, inducing an emf of 20V if magnetic field, velocity and length of conductor are mutually perpendicular to each other. |
| A. | 1T |
| B. | 2T |
| C. | 3T |
| D. | 4T |
| Answer» E. | |
| 4. |
Find the length of a conductor which is moving with a velocity 0.4m/s in a magnetic field of 8T, inducing an emf of 20V if magnetic field, velocity and length of conductor are mutually perpendicular to each other. |
| A. | 50m |
| B. | 5m |
| C. | 6.25m |
| D. | 0.5m |
| Answer» D. 0.5m | |
| 5. |
If a conductor 0.2m long moves with a velocity of 0.3m/s in a magnetic field of 5T, calculate the emf induced if magnetic field, velocity and length of conductor are mutually perpendicular to each other. |
| A. | 0.3V |
| B. | 0.03V |
| C. | 30V |
| D. | 3V |
| Answer» B. 0.03V | |
| 6. |
The formula for induced emf if magnetic field, length and velocity of conductor all are mutually perpendicular is __________ |
| A. | emf=B2l |
| B. | emf=Bil |
| C. | emf=Blv |
| D. | emf=B2v |
| Answer» D. emf=B2v | |
| 7. |
The total number of magnetic field lines passing through an area is termed as? |
| A. | Voltage |
| B. | EMF |
| C. | Magnetic flux |
| D. | Magnetic flux density |
| Answer» D. Magnetic flux density | |
| 8. |
What is the consequence of motor effect? |
| A. | Current |
| B. | Voltage |
| C. | Electromagnetic induction |
| D. | EMF |
| Answer» D. EMF | |
| 9. |
What happens to the current in a coil while accelerating a magnet inside it? |
| A. | Increases |
| B. | Decreases |
| C. | Remains constant |
| D. | Reverses |
| Answer» B. Decreases | |
| 10. |
An E.M.F. can be induced by _________ |
| A. | Change in the magnetic field only |
| B. | Change in the area of cross section only |
| C. | Change in angle between magnetic field and area only |
| D. | Change in the magnetic field, area or angle between them |
| Answer» E. | |
| 11. |
In a force-extension graph, force is taken along horizontal axis because |
| A. | extension is independent variable |
| B. | force is independent variable |
| C. | all of above |
| D. | force is dependent variable |
| Answer» C. all of above | |
| 12. |
The mass of alpha particle is |
| A. | 100 times the mass of electron |
| B. | 50 times the mass of electron |
| C. | 1000 times the mass of electron |
| D. | 500 times the mass of electron |
| Answer» D. 500 times the mass of electron | |
| 13. |
As compare to proton, the mass of neutron is |
| A. | 5% greater |
| B. | 10% greater |
| C. | 0.1% greater |
| D. | 1% greater |
| Answer» D. 1% greater | |
| 14. |
As the depth increases, the pressure in a fluid |
| A. | decreases |
| B. | increases |
| C. | varies |
| D. | remains constant |
| Answer» C. varies | |
| 15. |
1 Tesla is equal to |
| A. | 100 N A-1m-1 |
| B. | 50 N A-1m-1 |
| C. | 1000 N A-1m-1 |
| D. | 1 N A-1m-1 |
| Answer» E. | |
| 16. |
If the ball is thrown upwards, the energy changings are |
| A. | g.p.e changes to k.e |
| B. | k.e changes to g.p.e |
| C. | mechanical energy changes to k.e |
| D. | k.e changes to mechanical energy |
| Answer» C. mechanical energy changes to k.e | |
| 17. |
The gradient of force-extension graph is |
| A. | increasing |
| B. | variable |
| C. | force constant |
| D. | decreasing |
| Answer» D. decreasing | |
| 18. |
The electrons move around the nucleus in form of |
| A. | dust particles |
| B. | clouds |
| C. | charge |
| D. | steam |
| Answer» C. charge | |
| 19. |
The current and voltage are |
| A. | inversely related |
| B. | directly related |
| C. | gives abnormal behavior on graph |
| D. | not related |
| Answer» C. gives abnormal behavior on graph | |
| 20. |
In generators, the rate of change of flux linkage is maximum when the coil is moving through the |
| A. | horizontal position |
| B. | vertical position |
| C. | at an angle of 45° |
| D. | diagonal position |
| Answer» B. vertical position | |
| 21. |
When the field is parallel to the plane of area, the magnetic flux through coil is |
| A. | infinite |
| B. | zero |
| C. | 5 |
| D. | 2 |
| Answer» C. 5 | |
| 22. |
The instrument which transfers energy to electric charges in a circuit is |
| A. | voltmeter |
| B. | battery |
| C. | galvanometer |
| D. | ammeter |
| Answer» C. galvanometer | |
| 23. |
A straight wire of length 0.20 m moves at a steady speed of 3.0 ms-1 at right angles to the magnetic field of flux density 0.10 T. The emf induced across ends of wire is |
| A. | 0.06 V |
| B. | 0.5 V |
| C. | 0.04 V |
| D. | 0.05 V |
| Answer» B. 0.5 V | |
| 24. |
Our weight, as measured by the spring weighing machine is equivalent of |
| A. | The total centripetal force required to keep us moving on earth's axis |
| B. | The total gravitational force that earth exerts on us |
| C. | The total gravitational force that earth exerts on us - The total centripetal force required to keep |
| D. | The total gravitational force that earth exerts on us + The total centripetal force required to keep |
| Answer» D. The total gravitational force that earth exerts on us + The total centripetal force required to keep | |
| 25. |
The acceleration due to gravity on moon is |
| A. | 9.5 ms-2 |
| B. | 9.9 ms-2 |
| C. | 1.6 ms-2 |
| D. | 6.1 ms-2 |
| Answer» D. 6.1 ms-2 | |
| 26. |
1 W is equal to |
| A. | 1 Js |
| B. | 10 Js-1 |
| C. | 100 Js |
| D. | 1Js-1 |
| Answer» E. | |
| 27. |
Moving a coil in and out of magnetic field induces |
| A. | potential difference |
| B. | force |
| C. | voltage |
| D. | e.m.f |
| Answer» E. | |