Applications of magnetic forces and fields 1
Applications of magnetic forces and fields
1
Learning objective to explain the operating principle of electrical measuring instruments, electric engines; 2
Learning objective
to explain the operating principle of electrical measuring instruments, electric engines;
2
G) Group work. Fill in the blank spaces
(G) Group work. Fill in the blank spaces
A simple DC motor has just 4 main parts:
• The Rotor, made up of a 1)................................. mounted on an axle to allow it to 2)..................................
• The 3).................................. which provides the magnetic field, from either
a 4)............................... magnet, or an 5)...........................................
• The Brushes, which maintain 6)......................... contact between the electricity supply and the rotating coil.
The 7)........................
• The 7)...................................., which causes the current to 8)............................. every half-turn. The Motor Effect is also involved in the operation of a 9).....................
............................., and a moving-coil loudspeaker. In an electric meter, the needle moves along a calibrated scale because of the 10)............................ on a coil inside a 11).................................
(shape) magnetic field. In a loudspeaker, the sound is produced by 12)............................ of a speaker cone. In turn, this is made to vibrate by a coil’s magnetic field 13).....................................
with a permanent magnet.
I) Individual work Longer Response
(I) Individual work Longer Response Questions
Reflection What has been learned
Reflection
What has been learned
What remained unclear
What is necessary to work on
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