12. Electromagnetism
1. The unit of magnetic field strength is named _________ in his honour.
2. _________ was made a foreign member of the Royal Swedish Academy of Sciences in 1822.
3. We say that the magnetic field is ________________ i.e., magnetic field surrounds its source such as bar magnet.
4. The magnetic lines are formed around the magnet is technically called “_______________”.
5. The number of lines passing through the plane of area ‘A’ perpendicular to the field is called __________. It is denoted by ‘____’.
6. Magnetic flux represents the number of lines passing through the imagined plane in the field. Flux depends on the ____________ of the plane in the field.
7. The S.I unit of magnetic flux is _________.
8. The strength of the field is technically called _____________ .
9. ______________ is defined as the magnetic flux passing through unit area taken perpendicular to the field.
10. B is also known as ______________.
11. The ratio of magnetic flux passing through a plane perpendicular to the field and the area of the plane is called the _______________.
12. So magnetic flux density = _____________. ( B = F/A. ⟹Φ = BA)
13. The unit of magnetic flux density is ___________. It is also called Tesla.
14. B = magnetic flux / __________.
15. When the current in the coil is in _______________, the direction of magnetic field due to the coil points away from you.
16. When you curl your right hand fingers in the direction of current, thumb gives the direction of ____________.
17. A ___________ is a long wire wound in a close packed helix.
18. The magnetic field lines set up by solenoid resemble those of a bar magnet indicating that a solenoid behaves like a __________.
19. The direction of the field due to solenoid is determined by using ______________.
20. One end of the solenoid behaves like a north pole and other behaves like a ___________.
21. The field lines outside the solenoid are ________ with those inside.
22. Outside the _________ the direction of the field lines is from north to south while inside the direction is from south to north.
23. Themagnetic field lines are ____________.
24. The current carrying wires produce _____________.
25. The electric charges in motion produce ___________.
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