MAGNETIC FORCE AND ELECTRIC MOTOR
1. On what factors, does the force experienced by a current carrying conductor placed inside a magnetic field, depends?
2. How one can show experimentally that force on a current carrying conductor depends upon the
(a) direction of the magnetic field? (b) direction of the flow of current?
3. Why is current carrying conductor experiences a force on placing it, inside a magnetic field?
4. When the force experienced by a straight current carrying conductor will be maximum?
5. How one can determine the direction of force on a straight current carrying conductor placed inside a magnetic field?
6. Can the magnetic force, on a charge moving in magnetic field, accelerate the charge linearly?
7. In which direction, does the electron beam moving along the earth’s equator (from west to east) will experience the force due to the earth’s magnetic field?
8. State the principle on which an electric motor works.
9. Name the device which converts electrical energy into mechanical energy?
9. Explain the working of an electric motor with the help of a labeled diagram.
10. What is the function of split rings in an electric motor?
11. How rotation of electric motor armature will be affected on (i) interchanging the magnetic poles (ii) reversing battery polarity (iii) both (i) and (ii) simultaneously?
12. Can direction of flow of current, direction of magnetic field and magnetic force on that current carrying conductor lie in same plane?
13. A bar magnet is placed inside a uniform magnetic field as shown below.
What type of motion do you expect from the bar magnet?
15. What will happen if we change the split ring by two different complete rings in an electric motor?
16. What will happen if we use circular coil instead of rectangular coil in armature of an electric generator?
17. Can we differentiate magnetic field lines formed due to a bar magnet and a current carrying solenoid using a compass?
18. If a current carrying conductor experiences a force (action) on placing it in a magnetic field then which component experiences its reaction as per the Newton’s third law?
19. If we halve the number of turns in a current carrying solenoid without changing anything else, what will be the difference in force experienced on placing it in a magnetic field from the previous case?
20. What will happen to the rotation of armature if we:–
(a) increase the number of rectangular turns? (b) increase the magnetic pole strength?
(c) decrease the current through armature coil?
No comments:
Post a Comment